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Razavi-Shearer D, Child H, Razavi-Shearer K, Voeller A, Razavi H, Buti M, Tacke F, Terrault N, Zeuzem S, Abbas Z, Aghemo A, Akarca U, Al Masri N, Alalwan A, Blomé MA, Jerkeman A, Aleman S, Kamal H, Alghamdi A, Alghamdi M, Alghamdi S, Al-Hamoudi W, Ali E, Aljumah A, Altraif I, Amarsanaa J, Asselah T, Baatarkhuu O, Babameto A, Ben-Ari Z, Berg T, Biondi M, Braga W, Brandão-Mello C, Brown R, Brunetto M, Cabezas J, Cardoso M, Martins A, Chan H, Cheinquer H, Chen CJ, Yang HI, Chen PJ, Chien CH, Chuang WL, Garza LC, Coco B, Coffin C, Coppola N, Cornberg M, Craxi A, Crespo J, Cuko L, De Ledinghen V, Duberg AS, Etzion O, Ferraz M, Ferreira P, Forns X, Foster G, Fung J, Gaeta G, García-Samaniego J, Genov J, Gheorghe L, Gholam P, Gish R, Glenn J, Hamid S, Hercun J, Hsu YC, Hu CC, Huang JF, Idilman R, Jafri W, Janjua N, Jelev D, Jia J, Kåberg M, Kaita K, Kao JH, Khan A, Kim D, Kondili L, Lagging M, Lampertico P, Lázaro P, Lazarus J, Lee MH, Yang HI, Lim YS, Lobato C, Macedo G, Marinho R, Marotta P, Mendes-Correa M, Méndez-Sánchez N, Navas MC, Ning Q, Örmeci N, Orrego M, Osiowy C, Pan C, Pessoa M, Piracha Z, Pop C, Qureshi H, Raimondo G, Ramji A, Ribeiro S, Ríos-Hincapié C, Rodríguez M, Rosenberg W, Roulot D, Ryder S, Saeed U, Safadi R, Shouval D, Sanai F, Sanchez-Avila J, Santantonio T, Sarrazin C, Seto WK, Seto WK, Simonova M, Tanaka J, Tergast T, Tsendsuren O, Valente C, Villalobos-Salcedo J, Waheed Y, Wong G, Wong V, Yip T, Wong V, Wu JC, Yang HI, Yu ML, Yuen MF, Yurdaydin C, Zuckerman E. Adjusted estimate of the prevalence of hepatitis delta virus in 25 countries and territories. J Hepatol 2024; 80:232-242. [PMID: 38030035 DOI: 10.1016/j.jhep.2023.10.043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 10/13/2023] [Accepted: 10/30/2023] [Indexed: 12/01/2023]
Abstract
BACKGROUND & AIMS Hepatitis delta virus (HDV) is a satellite RNA virus that requires the hepatitis B virus (HBV) for assembly and propagation. Individuals infected with HDV progress to advanced liver disease faster than HBV-monoinfected individuals. Recent studies have estimated the global prevalence of anti-HDV antibodies among the HBV-infected population to be 5-15%. This study aimed to better understand HDV prevalence at the population level in 25 countries/territories. METHODS We conducted a literature review to determine the prevalence of anti-HDV and HDV RNA in hepatitis B surface antigen (HBsAg)-positive individuals in 25 countries/territories. Virtual meetings were held with experts from each setting to discuss the findings and collect unpublished data. Data were weighted for patient segments and regional heterogeneity to estimate the prevalence in the HBV-infected population. The findings were then combined with The Polaris Observatory HBV data to estimate the anti-HDV and HDV RNA prevalence in each country/territory at the population level. RESULTS After adjusting for geographical distribution, disease stage and special populations, the anti-HDV prevalence among the HBsAg+ population changed from the literature estimate in 19 countries. The highest anti-HDV prevalence was 60.1% in Mongolia. Once adjusted for the size of the HBsAg+ population and HDV RNA positivity rate, China had the highest absolute number of HDV RNA+ cases. CONCLUSIONS We found substantially lower HDV prevalence than previously reported, as prior meta-analyses primarily focused on studies conducted in groups/regions that have a higher probability of HBV infection: tertiary care centers, specific risk groups or geographical regions. There is large uncertainty in HDV prevalence estimates. The implementation of reflex testing would improve estimates, while also allowing earlier linkage to care for HDV RNA+ individuals. The logistical and economic burden of reflex testing on the health system would be limited, as only HBsAg+ cases would be screened. IMPACT AND IMPLICATIONS There is a great deal of uncertainty surrounding the prevalence of hepatitis delta virus among people living with hepatitis B virus at the population level. In this study, we aimed to better understand the burden in 25 countries and territories, to refine techniques that can be used in future analyses. We found a lower prevalence in the majority of places studied than had been previously reported. These data can help inform policy makers on the need to screen people living with hepatitis B virus to find those coinfected with hepatitis delta virus and at high risk of progression, while also highlighting the pitfalls that other researchers have often fallen into.
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Khan MA, Alhayyan H, Aljahdali HH, Rajendram R, Alturaifi D, Jawad M, Alyami SM, Sher H, Almutairi AM, Alghamdi M. A Single-Center Study of the Utility of Bronchoalveolar Lavage in Critically Ill Patients With Haematological Malignancy or Stem Cell Transplants. Cureus 2023; 15:e50296. [PMID: 38205482 PMCID: PMC10776959 DOI: 10.7759/cureus.50296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/10/2023] [Indexed: 01/12/2024] Open
Abstract
INTRODUCTION The aim of this study was to evaluate the yield of bronchoscopy-guided bronchoalveolar lavage (BAL) and decisions on management of antimicrobials in critically ill patients with hematological malignancy and/or hematological stem cell transplant (HSCT). The safety and tolerance of bronchoscopy were also reported. METHODS A retrospective cohort study was conducted by reviewing health charts of all adult patients with a hematological malignancy and/or an HSCT who were admitted to the intensive care unit and underwent bronchoscopy and BAL over four years from April 2016 to April 2020 at King Abdulaziz Medical City, Riyadh. Results: The cohort included 75 critically ill patients. Of these 75 patients, 53 (70.7%) had HSCT (allogenic 66%, autologous 32.1%, haplogenic 3.8%). Computed tomography of the chest was abnormal in all patients. Predominant findings included airspace abnormalities, ground glass opacities, and others. The positive yield was found to be 20% for bacterial, 22% for viral, 21% for fungal, and other organisms were identified in 2%. Although cytology was not performed in 18 patients, malignant cells were identified on BAL in two patients. While the overall mortality of the cohort was high (46.7%), the vast majority (94.7%) tolerated bronchoscopy and BAL without any complications. However, three patients (4%) developed a pneumothorax and one patient bled and developed the acute respiratory distress syndrome post bronchoscopy. CONCLUSIONS BAL can identify and detect microorganisms directly influencing the clinical care of patients who have received non-invasive diagnostic tests that yielded negative culture results. Bronchoscopy and BAL are generally safe and well tolerated by critically ill patients with hematological malignancy or HSCT.
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Affiliation(s)
- Mohammad Ayaz Khan
- Department of Medicine, King Abdulaziz Medical City Riyadh, Riyadh, SAU
- College of Medicine, King Saud Bin Abdulaziz University for Health Sciences, Riyadh, SAU
- Research, King Abdullah International Medical Research Center, Riyadh, SAU
| | - Hajar Alhayyan
- Department of Medicine, King Abdulaziz Medical City Riyadh, Riyadh, SAU
- College of Medicine, King Saud Bin Abdulaziz University for Health Sciences, Riyadh, SAU
| | - Hamdan H Aljahdali
- Department of Medicine, King Abdulaziz Medical City Riyadh, Riyadh, SAU
- College of Medicine, King Saud Bin Abdulaziz University for Health Sciences, Riyadh, SAU
- Research, King Abdullah International Medical Research Center, Riyadh, SAU
| | - Rajkumar Rajendram
- Department of Medicine, King Abdulaziz Medical City Riyadh, Riyadh, SAU
- College of Medicine, King Saud Bin Abdulaziz University for Health Sciences, Riyadh, SAU
- Research and Development, King Abdullah International Medical Research Center, Riyadh, SAU
| | - Dana Alturaifi
- Department of Medicine, King Abdulaziz Medical City Riyadh, Riyadh, SAU
| | - Muhammad Jawad
- Department of Medicine, King Abdulaziz Medical City Riyadh, Riyadh, SAU
| | - Sami M Alyami
- Department of Medicine, King Abdulaziz Medical City Riyadh, Riyadh, SAU
| | - Hooryia Sher
- Department of Biomedical Science, York University, Toronto, CAN
| | - Ahmed M Almutairi
- Department of Medicine, King Abdulaziz Medical City Riyadh, Riyadh, SAU
| | - Majed Alghamdi
- Department of Medicine, King Abdulaziz Medical City Riyadh, Riyadh, SAU
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Mohamad I, Karam I, El-Sehemy A, Abu-Gheida I, Al-Ibraheem A, AL-Assaf H, Aldehaim M, Alghamdi M, Alotain I, Ashour M, Bushehri A, ElHaddad M, Hosni A. The Evolving Role of Stereotactic Body Radiation Therapy for Head and Neck Cancer: Where Do We Stand? Cancers (Basel) 2023; 15:5010. [PMID: 37894377 PMCID: PMC10605184 DOI: 10.3390/cancers15205010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 10/09/2023] [Accepted: 10/12/2023] [Indexed: 10/29/2023] Open
Abstract
Stereotactic body radiation therapy (SBRT) is a precise and conformal radiation therapy (RT) that aims to deliver a high dose of radiation to the tumor whilst sparing surrounding normal tissue, making it an attractive option for head and neck cancer (HNC) patients who are not suitable for the traditional long course of RT with comprehensive RT target volume. Definitive SBRT for HNC has been investigated in different settings, including early stage glottis cancer, and as an alternative to brachytherapy boost after external beam RT. It is also used as a primary treatment option for elderly or medically unfit patients. More recently, an SBRT combination with immunotherapy in the neoadjuvant setting for HNC showed promising results. Salvage or adjuvant SBRT for HNC can be used in appropriately selected cases. Future studies are warranted to determine the optimum dose and fractionation schedules in any of these indications.
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Affiliation(s)
- Issa Mohamad
- Department of Radiation Oncology, King Hussein Cancer Center, Amman 11941, Jordan;
| | - Irene Karam
- Department of Radiation Oncology, Odette Cancer Centre, University of Toronto, Toronto, ON M4N3M5, Canada;
| | - Ahmed El-Sehemy
- Faculty of Medicine, University of Toronto, Toronto, ON M5S1A1, Canada;
| | - Ibrahim Abu-Gheida
- Department of Radiation Oncology, Burjeel Medical City, Abu Dhabi 7400, United Arab Emirates;
- Emirates Oncology Society, Dubai 2299, United Arab Emirates
| | - Akram Al-Ibraheem
- Department of Nuclear Medicine, King Hussein Cancer Center, Amman 11941, Jordan;
| | - Hossam AL-Assaf
- Department of Radiation Oncology, Comprehensive Cancer Center, King Fahad Medical City, Riyadh 11525, Saudi Arabia
| | - Mohammed Aldehaim
- Department of Radiation Oncology, King Faisal Specialist Hospital and Research Center Riyadh, Riyadh 11211, Saudi Arabia;
| | - Majed Alghamdi
- Radiation Oncology, Princess Noorah Oncology Center, King Abdulaziz Medical City, Ministry of National Guard Health Affairs-Western Region, Jeddah 21556, Saudi Arabia;
- College of Medicine, King Saud Bin Abdulaziz University for Health Sciences, Jeddah 11481, Saudi Arabia
| | - Ibrahim Alotain
- Department of Radiation Oncology, King Fahad Specialist, Dammam 31444, Saudi Arabia;
| | - May Ashour
- Department of Radiation Oncology, National Cancer Institute, Cairo University, Cairo 11796, Egypt;
| | - Ahmad Bushehri
- Department of Radiation Oncology, Kuwait Cancer Control Center, Kuwait 42262, Kuwait;
| | - Mostafa ElHaddad
- Clinical Oncology Department, Kasr Al-Ainy Center of Clinical Oncology and Nuclear Medicine, Kasr Al-Ainy School of Medicine, Cairo University, Cairo 12613, Egypt
| | - Ali Hosni
- Radiation Medicine Program, Princess Margaret Cancer Centre, University Health Network, University of Toronto, Toronto, ON M5G2M9, Canada
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Alghamdi M, Alzahrani R, Alghamdi A, Ali M, Alghamdi AM, Alghamdi W, Alghamdi K, Alghamdi S. AWARENESS AND KNOWLEDGE OF OBSTRUCTIVE SLEEP APNEA AMONG THE POPULATION OF THE AL-BAHA REGION OF SAUDI ARABIA: A CROSS-SECTIONAL STUDY. Georgian Med News 2023:153-158. [PMID: 38096533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
Obstructive sleep apnea (OSA) is a known sleep-disordered breathing, with known morbidity and mortality, that affects a lot of people worldwide. In Saudi Arabia, the prevalence of OSA is estimated to be around 8.8% among adult males and 5.1% among adult females. The research is a cross-sectional study design conducted in the Al-Baha region; Saudi Arabia in 385 participants. To evaluate the knowledge and awareness of OSA, the study utilized a validated and reliable adapted Arabic version of the OSA questionnaire. The degree of consciousness and understanding regarding OSA demonstrated a noteworthy connection with varying levels of education and a favorable family history of OSAS (p<0.05). The regression analyses unveiled that people with a familial OSA background had a 2.565-fold increased likelihood of identifying daytime fatigue as a symptom of OSA (p<0.05). The study reported an insufficient level of awareness and knowledge of OSA among the Saudi Arabian population. Various factors, including gender, education, and family history of OSA, may affect the awareness and knowledge of this condition.
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Affiliation(s)
- M Alghamdi
- 1Unit of Otolaryngology, Department of Surgery, Faculty of Medicine, Al-Baha University, Saudi Arabia
| | - R Alzahrani
- 1Unit of Otolaryngology, Department of Surgery, Faculty of Medicine, Al-Baha University, Saudi Arabia
| | - A Alghamdi
- 2Community Medicine Department, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - M Ali
- 1Unit of Otolaryngology, Department of Surgery, Faculty of Medicine, Al-Baha University, Saudi Arabia
| | - A M Alghamdi
- 3Faculty of Medicine, Al-Baha University, Saudi Arabia
| | - W Alghamdi
- 3Faculty of Medicine, Al-Baha University, Saudi Arabia
| | - Kh Alghamdi
- 3Faculty of Medicine, Al-Baha University, Saudi Arabia
| | - Sh Alghamdi
- 3Faculty of Medicine, Al-Baha University, Saudi Arabia
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Alfosail EK, Alghamdi M. Perception and Acceptance of COVID-19 Vaccine Among Healthcare Workers in Jeddah, Saudi Arabia. Cureus 2023; 15:e35673. [PMID: 37012961 PMCID: PMC10066419 DOI: 10.7759/cureus.35673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/01/2023] [Indexed: 03/06/2023] Open
Abstract
Introduction The COVID-19 pandemic has resulted in significant hospitalizations and deaths, particularly among healthcare workers (HCWs). Various therapeutic and preventive measures have been introduced, with vaccination considered the primary preventive measure. This study aims to assess the perceptions and acceptance of COVID-19 vaccination among HCWs. Methods We conducted an analytical cross-sectional study on HCWs in hospitals located in Jeddah, Saudi Arabia. The study included physicians, nurses, pharmacists, lab technicians, and radiologists who work in the Ministry of Health's general hospitals. A total of 394 participants were included in the study. Data were analyzed using SPSS v26, and a p-value less than 0.05 was considered significant. Results A majority of the participants (72.6%) were female, aged between 31-40 years (55.3%), and married (59.6%). More than half of the participants (55.6%) had received training on dealing with COVID-19. The mean scores for COVID-19 vaccine refusal, perceived susceptibility, perceived severity, perceived benefits, perceived barriers, and perceived effectiveness of COVID-19 vaccination were 18.36 ± 7.02, 14.48 ± 3.62, 11.51 ± 2.99, 12.39 ± 3.5, 8.25 ± 2.35, and 8.40 ± 2.46, respectively. Age was found to be correlated with the perceived severity of COVID-19 in non-vaccination (p=0.048), while gender was associated with the perceived severity of COVID-19 (p=0.015). Marital status (p=0.001), years of experience (p=0.009), profession (p=0.019), and education (p=0.028) were found to be correlated with perceived susceptibility. Education levels were found to be correlated with the perceived benefits of vaccination (p=0.007), perceived barriers to vaccines (p=0.002), and vaccine views (p=0.002). Years of experience (p=0.017) were found to be correlated with perceived severity of COVID-19, while profession type was significantly associated with perceived severity of COVID-19 (p=0.016) and vaccine view (p=0.008) Conclusion The study found that participants had a positive perception and high acceptance of COVID-19 vaccination. The results also indicated that various sociodemographic factors were associated with the perception and acceptance of COVID-19 vaccines among HCWs. These findings could help in formulating effective strategies to improve vaccination uptake rates among HCWs, thereby reducing transmission and mortality among Health Care Workers due to COVID-19.
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Alghamdi M, El-Zahhar AA, Idris AM, Sahlabji T. Synthesis and characterization of novel polymeric-sepiolite composite resin for effective water softening: applications in batch and column adsorption. J MACROMOL SCI B 2022. [DOI: 10.1080/00222348.2022.2152164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Majed Alghamdi
- Environmental Monitoring, Assessment & Treatment (EMAT) Research Group, Department of Chemistry, College of Science, King Khalid University, P.O. Box 9004, Abha 62529, Saudi Arabia
| | - Adel A. El-Zahhar
- Environmental Monitoring, Assessment & Treatment (EMAT) Research Group, Department of Chemistry, College of Science, King Khalid University, P.O. Box 9004, Abha 62529, Saudi Arabia
- Nuclear Chem. Dept. AEA, Cairo-13759, Egypt
| | - Abubakr Mustafa Idris
- Environmental Monitoring, Assessment & Treatment (EMAT) Research Group, Department of Chemistry, College of Science, King Khalid University, P.O. Box 9004, Abha 62529, Saudi Arabia
- Research Center for Advanced Materials Science (RCAMS), King Khalid University, Abha 62529, Saudi Arabia
| | - Taher Sahlabji
- Environmental Monitoring, Assessment & Treatment (EMAT) Research Group, Department of Chemistry, College of Science, King Khalid University, P.O. Box 9004, Abha 62529, Saudi Arabia
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Alahmadi A, Alghamdi M. Knowledge and practice of primary healthcare physicians toward diagnosis of oral clefts through prenatal ultrasound imaging: An analytical cross-sectional study. MS 2022. [DOI: 10.54905/disssi/v26i125/ms306e2390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Alghamdi M, Aljaafri ZA, Alhadlaq KH, Alamro SA, Alfaryan SM, Al Swaidan O, Mohamud M. Association Between Asthmatic Patients' Asthma Control Test Score and the Number of Exacerbations per Year in King Abdulaziz Medical City, Riyadh. Cureus 2022; 14:e24001. [PMID: 35547440 PMCID: PMC9086837 DOI: 10.7759/cureus.24001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/09/2022] [Indexed: 11/05/2022] Open
Abstract
Background Asthma is a reactive airway disease that has a high prevalence across the globe. Asthma exacerbations can occur due to various bacterial and viral infections that irritate nerve endings in the airways. With time, airway obstruction follows, and patients with asthma have various symptoms that occur intermittently. Asthma symptoms primarily include breathlessness, wheezing, coughing, and chest tightness. This research focused on the association between the Asthma Control Test (ACT) score and number of exacerbations per year. Methods A questionnaire-based, cross-sectional study was conducted at the outpatient pulmonary clinic, King Abdulaziz Medical City, a tertiary hospital in Riyadh. The study included 227 adult patients who were diagnosed with asthma and had no other pulmonary diseases or other medical diseases that could mimic asthma exacerbation. Data was collected by direct interview with the patients and through the BESTCare system in King Abdulaziz Medical City. All the data were collected through Microsoft Excel 2010 (Microsoft, Redmond, WA, USA) and analyzed using Statistical Package for Social Sciences (SPSS) Statistics version 23 (IBM Corp., Armonk, NY, US). The categorical data we used were presented by percentages and frequencies such as gender, whereas the numerical data were prescribed as mean and standard deviation such as age and number of exacerbations. For inferential statistics, Chi square was used to find the association between the categorical variable while T-test and ANOVA test were used to find the relationship between asthma control test score of asthmatic patients, which was divided into three different groups based on their scores that include: well-controlled, partially controlled, or uncontrolled, and the number of exacerbations per year. Results A total of 227 adult asthma patients were enrolled in this study, most of them were females (72.7%). Average age of the participants was 47.3 ± 13.8 years. The average ACT score was found to be 18.5 ± 4.9 out of 25. Uncontrolled asthma was present in 26% of the patients, 22.9% were partially controlled and 51.1% had well-controlled asthma; to relieve the exacerbation most of the patients used salbutamol (51.5%), 35.2% used oxygen and 30.4% did not use any medication. Gender and age were not associated with ACT score (P = 0.787 and 0.797, respectively), whereas number of exacerbations was significantly associated with ACT score (P = 0.000), as fewer exacerbations were reported with higher ACT scores. Conclusion About one-quarter of the patients had uncontrolled asthma, slightly less than one-quarter of the patients had partially controlled asthma while more than half of the patients had well-controlled asthma. Number of exacerbations was found to be significantly associated with asthma control test score as fewer exacerbations were reported in well-controlled asthmatic patients.
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Affiliation(s)
- Majed Alghamdi
- Pulmonary Medicine, Ministry of the National Guard Health Affairs, Riyadh, SAU
- College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Riyadh, SAU
| | - Ziad A Aljaafri
- College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Riyadh, SAU
| | - Khalid H Alhadlaq
- College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Riyadh, SAU
| | - Sultan A Alamro
- College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Riyadh, SAU
| | - Saud M Alfaryan
- College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Riyadh, SAU
| | - Osama Al Swaidan
- College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Riyadh, SAU
| | - Mohamud Mohamud
- Medical Education, King Saud bin Abdulaziz University for Health Sciences, Riyadh, SAU
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Alghamdi M, Bugis BA, Bugis A, Alharbi N, Alotaibi SM, Alanzi ZH, Almutairi YY, Elamro RA, Aloqayfi FA, Alsalem OA. The Prevalence of Liver Diseases among Chronic Obstructive Pulmonary Disease Patients: Statistics from Riyadh, Saudi Arabia. JPRI 2021. [DOI: 10.9734/jpri/2021/v33i55a33815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Background: Alpha-1 antitrypsin is an important protein produced by the liver, and deficiency in this protein will cause many liver diseases. A deficiency in this protein can cause congenital emphysema, characterized by damaged and stretched air sacs of the lungs. To our knowledge, limited studies have been performed on liver disease prevalence among chronic obstructive pulmonary disease (COPD) patients in Saudi Arabia.
Methods: This study was a secondary data analysis of existing clinical records and aimed at determining the prevalence and association of liver diseases among COPD patients from 2016 to 2020. A total of 1579 clinical records were collected. In this study we analyzed one hundred fifty-five records.
Results: Senior patients who were aged 65 or older represented most patients (61.29%). In addition, 81% of the selected COPD patients were diagnosed with cirrhosis, while only one patient was diagnosed with fibrosis. Senior COPD patients aged 65 years or older were more likely to be diagnosed clinically with any type of liver disease (61.75%) than those from younger age groups.
Conclusions: Screening and expression tests for patients showing liver and lung diseases are the procedures to determine whether symptoms are due to alpha-1 antitrypsin deficiency. However, this is challenging in patients with COPD.
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Owolabi LF, Reda AA, Raafat A, M Fares DM, Enwere OO, Mba UA, Adamu B, Alghamdi M. Nerve conduction study findings and their predictors in clinically diagnosed patients with carpal tunnel syndrome in a Saudi population. Niger J Clin Pract 2021; 24:1423-1429. [PMID: 34657005 DOI: 10.4103/njcp.njcp_459_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background Despite the reports of carpal tunnel syndrome (CTS) being commonplace in Saudi Arabia, there is scarcity of cross-sectional or prospective studies detailing the profile of nerve conduction study (NCS) findings in patients with CTS. Objective The study aimed to evaluate the neurophysiologic profile of CTS with the view to finding the determinant of abnormal findings in clinically diagnosed cases of CTS in a population of Saudis. Methods Nerve conduction study was performed on consecutive patients with clinically diagnosed CTS. Median sensory, ulnar sensory, radial sensory median motor and ulnar motor nerves were assessed. The nerve conduction parameters measured were median and ulnar sensory peak latency, amplitude and velocity. Median conduction velocity, distal latency, and amplitude were also measured. Comparative median-ulnar and median-ulnar-digit 4 studies were done and the severity of CTS was determined. Data was analyzed using STATA software version 12. Results A total of 152 patients, comprising 59 males and 93 females (mean age of 42.7 years) with clinically diagnosed CTS were seen during the study period. About 72.4% patients had numbness and paresthesia in the affected fingers, 66.5% had pain in the hands, and 10.5% had weakness in the affected hands. Majority of the patients (62%) had bilateral clinical features. Carpal tunnel syndrome was confirmed with NCS in 84 (55.26%) patients. Presence of weakness in the affected hand, positive Phalen' sign, and positive Tinel's sign in patients appear to predict [6.1 (1.2-30.7), 3.9 (1.2-30.2), and 4.9 (1.4-17.0) respectively] abnormal NCS findings after adjustment for age, gender and the presence of DM. Conclusion The study revealed that over half of the patients with CTS had NCS/ Electromyography (EMG) abnormalities. Presence of hand muscles weakness, positive Phalen and Tinel's signs predict abnormal findings on NCS/EMG in patients with CTS.
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Affiliation(s)
- L F Owolabi
- Department of Medicine, University of Bisha, Bisha, Saudi Arabia
| | - A A Reda
- Department of Medicine, University of Bisha, Bisha, Saudi Arabia
| | - A Raafat
- King Abdullah Hospital, Bisha, Saudi Arabia
| | | | - O O Enwere
- King Abdullah Hospital, Bisha, Saudi Arabia
| | - U A Mba
- King Abdullah Hospital, Bisha, Saudi Arabia
| | - B Adamu
- Department of Medicine, University of Bisha, Bisha, Saudi Arabia
| | - M Alghamdi
- Department of Medicine, University of Bisha, Bisha, Saudi Arabia
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Alghamdi M, Gumbleton M, Newland B. Local delivery to malignant brain tumors: potential biomaterial-based therapeutic/adjuvant strategies. Biomater Sci 2021; 9:6037-6051. [PMID: 34357362 DOI: 10.1039/d1bm00896j] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Glioblastoma (GBM) is the most aggressive malignant brain tumor and is associated with a very poor prognosis. The standard treatment for newly diagnosed patients involves total tumor surgical resection (if possible), plus irradiation and adjuvant chemotherapy. Despite treatment, the prognosis is still poor, and the tumor often recurs within two centimeters of the original tumor. A promising approach to improving the efficacy of GBM therapeutics is to utilize biomaterials to deliver them locally at the tumor site. Local delivery to GBM offers several advantages over systemic administration, such as bypassing the blood-brain barrier and increasing the bioavailability of the therapeutic at the tumor site without causing systemic toxicity. Local delivery may also combat tumor recurrence by maintaining sufficient drug concentrations at and surrounding the original tumor area. Herein, we critically appraised the literature on local delivery systems based within the following categories: polymer-based implantable devices, polymeric injectable systems, and hydrogel drug delivery systems. We also discussed the negative effect of hypoxia on treatment strategies and how one might utilize local implantation of oxygen-generating biomaterials as an adjuvant to enhance current therapeutic strategies.
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Affiliation(s)
- Majed Alghamdi
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, King Edward VII Avenue, Cardiff, CF10 3NB, UK. and Faculty of Pharmacy, King Abdulaziz University, Jeddah, 22522, Kingdom of Saudi Arabia
| | - Mark Gumbleton
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, King Edward VII Avenue, Cardiff, CF10 3NB, UK.
| | - Ben Newland
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, King Edward VII Avenue, Cardiff, CF10 3NB, UK. and Leibniz-Institut für Polymerforschung Dresden, Max Bergmann Center of Biomaterials Dresden, Hohe Straße 6, D-01069 Dresden, Germany
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12
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Copeland M, Alqahtani RT, Moody J, Curdy B, Alghamdi M, Alqurashi F. When Friends Bring You Down: Peer Stress Proliferation and Suicidality. Arch Suicide Res 2021; 25:672-689. [PMID: 32264764 DOI: 10.1080/13811118.2020.1746939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Peers play a significant role in adolescent mental well-being and suicidality. While social integration among peers is often assumed to benefit mental health, a growing literature recognizes that peer relationships can increase suicidality. Conceptualizing friends' disclosure of mental distress as a stressor on teens' own mental health clarifies how distressed peers relate to suicidal ideation given integration in key social contexts, such as school. This study applies the stress process to examine peer depression and self-harm disclosure as stressors predicting teens' suicidal ideation. Using cross-sectional data from an understudied context, youth in Saudi Arabia (n = 545, 50% female, mean age = 16.8), models find friends' disclosure of depression and self-harm are associated with adolescents' higher suicidal ideation net of their own depression. Teens who are more attached to school see higher risk of suicidality from friends' depression, while friends' self-harm predicts higher suicidality overall. Results challenge assumptions of uniformly beneficial social integration by indicating that friends' mental distress, particularly self-harm, can act as a stressor increasing youth suicidality.
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Alrayes H, Alazmi M, Alderaan K, Alghamdi M, Alghanim N, Alhazmi A, Alkhadhrawi N, Almohideb M, Attar S, Alzahrani ZA, Bedaiwi M, Zakaria N, Halabi H. AB0566 CONSENSUS-BASED RECOMMENDATIONS FOR THE MANAGEMENT OF PSORIATIC ARTHRITIS IN THE KINGDOM OF SAUDI ARABIA. Ann Rheum Dis 2021. [DOI: 10.1136/annrheumdis-2021-eular.298] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background:Psoriatic arthritis (PsA) is a chronic inflammatory condition associated with psoriasis. The common clinical features of PsA include peripheral arthritis, dactylitis, enthesitis, spondylitis, skin and nail disease1. Considering the heterogeneous course of disease and the different patient characteristics, there is a need to standardize management of PsA patients. At present, no established guidelines are available on PsA care pathway in Saudi Arabia.Objectives:To provide consensus-based guidance to all Saudi health care providers (HCPs) on the management of PsA patients including referral pathway, definition of remission and treat-to-target approach.Methods:A Delphi technique was used to understand PsA patient care pathway. In first step, a targeted literature review was conducted and a survey questionnaire including 16 questions was developed to explore PsA patient journey. In second step, this questionnaire was submitted to 127 HCPs and 33 of them provided their response. In third step, a panel of 12 experts including 10 rheumatologists, 1 dermatologist and 1 general physician reviewed the available evidence along with survey results to align on final recommendations.Results:The most common management guidelines recommended for PsA were European League against Rheumatism (EULAR, 100% agreed) and American College of Rheumatology (ACR, 100% agreed). Psoriasis Epidemiology Screening Tool (PEST) was recommended by 67% of experts as validated screening tool for PsA in dermatology clinic. The laboratory investigations included were C-reactive protein (CRP, 100%), erythrocyte sedimentation rate (ESR, 100%), complete blood count (92%), urea and creatinine (92%), liver function (92%), rheumatoid factor (56%) and X-ray of affected joints (75%). For patients with additional symptoms of back pain, X-ray of sacroiliac joints and human leukocyte antigen B27 (HLA-B27) test to be included. Only rheumatologists should recommend a magnetic resonance imaging based on the individual clinical picture. The agreement criteria for HCPs for referring patient to a rheumatologist were presence of psoriasis (100%) and one of the following features: dactylitis [100%], joint pain [100%], arthritis [100%], nail dystrophy [91%]. Patient with active arthritis should be referred to rheumatologist within 4 weeks. The referral pathway agreed by the experts for PsA patients is presented in Figure 1. Majority of experts (57%) defined clinical remission as absence of disease activity in all facets of disease assessed using the disease activity in psoriatic arthritis (DAPSA) or minimal disease activity (MDA) index. For treat-to-target, 71% of experts agreed on EULAR recommendations2. For remission and treat-to-target, experts identified a need for more clear definition.Conclusion:This expert consensus aimed to provide guidance to Saudi HCPs on standardizing diagnosis and care of PsA patients. Most experts recommended PEST as validated screening tool for PsA along with laboratory investigations such as CRP, ESR, X-ray, etc. Referral to a rheumatologist should be considered for patient with presence of psoriasis and one of the other defining features for PsA. There is a need for more clear definition of remission and treat-to-target.References:[1]Ogdie A, et al. Rheum Dis Clin North Am. 2015;41(4):545–568.[2]Gossec L, et al. Ann Rheum Dis. 2020;79:700–712.Figure 1.Referral pathway for psoriatic arthritis patients CRP: C-reactive protein; ESR: Erythrocyte sedimentation rate; CBC: Complete blood count; HLA-B27: Human leukocyte antigen B27; PEST: Psoriasis Epidemiology Screening ToolAcknowledgements:This project was supported by Novartis Saudi Ltd., Saudi Arabia and the Saudi Society for Rheumatology. We would also like to thank Dr. Xenofon Baraliakos for his support.Disclosure of Interests:Hanan Alrayes: None declared., Mansour Alazmi Speakers bureau: Pfizer, Abbvie, Khaled Alderaan: None declared., Mushabab Alghamdi: None declared., Nayef Alghanim: None declared., Ahmed Alhazmi: None declared., Nadeer Alkhadhrawi: None declared., Mohammad Almohideb Speakers bureau: Novartis, Abbvie, Celgene, Lilly, Jansen and Sanofi, Grant/research support from: Sanofi and Abbvie, Suzan Attar Speakers bureau: Lectures in symposium about different diseases in rheumatology and management, Grant/research support from: Research in recruiting patient, Zyad ahmed Alzahrani Speakers bureau: Pfizer, Novartis, MSD, Janssen, Abbvie, Lilly, Consultant of: Pfizer, Novartis, MSD, Janssen, Abbvie, Lilly, Mohamed Bedaiwi: None declared., Nancy Zakaria Employee of: Novartis, Hussein Halabi: None declared.
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Jazieh AR, Alghamdi M, Alkaiyat M, Al Johani SM, Damlaj M. A retrospective evaluation of the value of COVID-19 screening and testing in patients with cancer: Aiming at a moving target. J Infect Public Health 2021; 14:949-953. [PMID: 34130118 PMCID: PMC8152208 DOI: 10.1016/j.jiph.2021.05.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 04/17/2021] [Accepted: 05/03/2021] [Indexed: 01/12/2023] Open
Abstract
BACKGROUND Diagnosis of COVID-19 infection in cancer patients is critical to co-manage their underlying disease and infection appropriately. Our study aimed at evaluating the sensitivity and specificity of screening patients with cancer for COVID-19 infection. METHODS All oncology patients receiving care at Department of Oncology at King Abdulaziz Medical City in Riyadh were screened using the acute respiratory infection (ARI) survey. Nasopharyngeal and throat swap for polymerase chain reaction (PCR) testing for severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) was performed on patients who have high ARI score (i.e. ≥ 4), or any patient requiring elective/emergency hospitalization, undergoing a procedure as well as screening asymptomatic patients receiving chemotherapy between April 1st and July 30, 2020. Institutional Review Board approval was obtained. Descriptive and inferential analyses were done and sensitivity, specificity, positive and negative predictive values (PPV and NPV) were calculated considering the COVID-19 PCR as the gold standard. RESULTS During the study period, a total of 473 patients were included with a median age was 56 years (14-104), 51% were female, 73% had solid tumors, and 66% received treatment within the last 3 months. These patients underwent 688 PCR tests along with ARI survey screening. Testing was done in the outpatient, inpatient, and emergency department setting in 41%, 40% and 19% of the patients, respectively. Majority of tests were screening of asymptomatic patients and only 23% were tested for suspected infections with ARI ≥ 4. A total of 54 patients (8%) had positive PCR for COVID-19 infection. The prevalence of infection varied from month to month ranging from 1.09% in April up to 19.70% in June and correlated with the average daily and active case load at a national level. The diagnostic yield of the ARI score also correlated with infection burden nationally. The PPV and NPV of the ARI as a screening tool was 18.24% (0-31.8) and 95.6% (86.36-98.86%) with the PPN fluctuating considerably in parallel with the prevalence of COVID-19 result. Similarly, the sensitivity and specificity of the ARI were 55.77% (0-70.59) and 79.4 (69.19-92), respectively. CONCLUSION The yield of screening asymptomatic patients with cancer varies based on the community burden of COVID-19 infection. As universal screening can cause delays to patient care, it should be tailored based on the individual patient risks and infection burden in the region.
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Affiliation(s)
- Abdul Rahman Jazieh
- Department of Oncology, King Abdulaziz Medical City, King Abdullah International Medical Research Center, King Saud Bin Abdulaziz University for Health Sciences, Ministry of National Guard Health Affairs (MNGHA), Riyadh, Saudi Arabia.
| | - Majed Alghamdi
- Department of Medicine, College of Medicine, Al Baha University, Saudi Arabia; Radiation Oncology, Princess Norah Oncology Center, King Abdulaziz Medical City, Ministry of National Guard Health Affairs (MNGHA), Jeddah, Saudi Arabia
| | - Mohammad Alkaiyat
- Department of Oncology, King Abdulaziz Medical City, King Abdullah International Medical Research Center, King Saud Bin Abdulaziz University for Health Sciences, Ministry of National Guard Health Affairs (MNGHA), Riyadh, Saudi Arabia
| | - Sameera M Al Johani
- Department of Pathology and Laboratory Medicine, King Abdulaziz Medical City, King Abdullah International Medical Research Center, King Saud Bin Abdulaziz University for Health Sciences, Ministry of National Guard Health Affairs (MNGHA), Riyadh, Saudi Arabia
| | - Moussab Damlaj
- Department of Oncology, King Abdulaziz Medical City, King Abdullah International Medical Research Center, King Saud Bin Abdulaziz University for Health Sciences, Ministry of National Guard Health Affairs (MNGHA), Riyadh, Saudi Arabia
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15
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Alzahrani R, Obaid A, Al-Hakami H, Alshehri A, Al-Assaf H, Adas R, Alduhaibi E, Alsafadi N, Alghamdi S, Alghamdi M. Locally Advanced Oral Cavity Cancers: What Is The Optimal Care? Cancer Control 2020; 27:1073274820920727. [PMID: 32339002 PMCID: PMC7218312 DOI: 10.1177/1073274820920727] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Patients with oral cavity cancers often present late to seek medical care. Surgery is usually the preferred upfront treatment. However, surgical resection cannot be achieved in many cases with advanced disease without major impact on patient’s quality of life. On the other hand, radiotherapy (RT) and chemotherapy (CT) have not been employed routinely to replace surgery as curative treatment or to facilitate surgery as neoadjuvant therapy. The optimal care of these patients is challenging when surgical treatment is not feasible. In this review, we aimed to summarize the best available evidence-based treatment approaches for patients with locally advanced oral cavity cancer. Surgery followed by RT with or without CT is the standard of care for locally advanced oral cavity squamous cell carcinoma. In the case of unresectable disease, induction CT prior to surgery or chemoradiotherapy (CRT) can be attempted with curative intent. For inoperable patients or when surgery is expected to result in poor functional outcome, patients may be candidates for possibly curative CRT or palliative RT with a focus on quality of life.
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Affiliation(s)
- Rajab Alzahrani
- Department of Surgery, Medical School, Al Baha University, Al Baha, Saudi Arabia
| | - Arwa Obaid
- Department of Surgery, Medical School, Al Baha University, Al Baha, Saudi Arabia
| | - Hadi Al-Hakami
- Otolaryngiology/Head and Neck section, Department of Surgery, King Abdulaziz Medical City, Ministry of National Guard, Jeddah, Saudi Arabia.,King Saud Bin Abdulaziz University, Jeddah, Saudi Arabia.,King Abdullah International Medical Research Center, Jeddah, Saudi Arabia
| | - Ahmed Alshehri
- King Saud Bin Abdulaziz University, Jeddah, Saudi Arabia.,Medical Oncology Section, King Abdulaziz Medical City, Ministry of National Guard, Jeddah, Saudi Arabia
| | - Hossam Al-Assaf
- Radiation Oncology Department, Comprehensive Cancer Center, King Fahad Medical City, Riyadh, Saudi Arabia
| | - Reem Adas
- Medical Imaging Department, King Abdulaziz Medical City, Ministry of National Guard, Jeddah, Saudi Arabia
| | - Eman Alduhaibi
- Radiation Oncology Section, King Abdulaziz Medical City, Ministry of National Guard, Jeddah, Saudi Arabia
| | - Nabil Alsafadi
- Radiation Oncology Section, King Abdulaziz Medical City, Ministry of National Guard, Jeddah, Saudi Arabia
| | - Suliman Alghamdi
- King Saud Bin Abdulaziz University, Jeddah, Saudi Arabia.,King Abdullah International Medical Research Center, Jeddah, Saudi Arabia.,Radiation Oncology Section, King Abdulaziz Medical City, Ministry of National Guard, Jeddah, Saudi Arabia
| | - Majed Alghamdi
- Radiation Oncology Section, King Abdulaziz Medical City, Ministry of National Guard, Jeddah, Saudi Arabia.,Department of Medicine, Medical School, Al Baha University, Al Baha, Saudi Arabia
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16
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Alghamdi M, Chierchini F, Eigel D, Taplan C, Miles T, Pette D, Welzel PB, Werner C, Wang W, Neto C, Gumbleton M, Newland B. Poly(ethylene glycol) based nanotubes for tuneable drug delivery to glioblastoma multiforme. Nanoscale Adv 2020; 2:4498-4509. [PMID: 36132909 PMCID: PMC9418774 DOI: 10.1039/d0na00471e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 08/20/2020] [Indexed: 06/16/2023]
Abstract
Glioblastoma multiforme (GBM) is the most aggressive type of malignant brain tumour, which is associated with a poor two-year survival rate and a high rate of fatal recurrence near the original tumour. Focal/local drug delivery devices hold promise for improving therapeutic outcomes for GBM by increasing drug concentrations locally at the tumour site, or by facilitating the use of potent anti-cancer drugs that are poorly permeable across the blood brain barrier (BBB). For inoperable tumours, stereotactic delivery to the tumour necessitates the development of nanoscale/microscale injectable drug delivery devices. Herein we assess the ability of a novel class of polymer nanotube (based on poly(ethylene glycol) (PEG)) to load doxorubicin (a mainstay breast cancer therapeutic with poor BBB permeability) and release it slowly. The drug loading properties of the PEG nanotubes could be tuned by varying the degree of carboxylic acid functionalisation and hence the capacity of the nanotubes to electrostatically bind and load doxorubicin. 70% of the drug was released over the first seven days followed by sustained drug release for the remaining two weeks tested. Unloaded PEG nanotubes showed no toxicity to any of the cell types analysed, whereas doxorubicin loaded nanotubes decreased GBM cell viability (C6, U-87 and U-251) in a dose dependent manner in 2D in vitro culture. Finally, doxorubicin loaded PEG nanotubes significantly reduced the viability of in vitro 3D GBM models whilst unloaded nanotubes showed no cytotoxicity. Taken together, these findings show that polymer nanotubes could be used to deliver alternative anti-cancer drugs for local therapeutic strategies against brain cancers.
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Affiliation(s)
- Majed Alghamdi
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University King Edward VII Avenue Cardiff CF10 3NB UK
- School of Pharmacy, King Abdulaziz University Jeddah 21589 Saudi Arabia
| | - Filippo Chierchini
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University King Edward VII Avenue Cardiff CF10 3NB UK
| | - Dimitri Eigel
- Leibniz-Institut für Polymerforschung Dresden, Max Bergmann Center of Biomaterials Dresden Hohe Straße 6 D-01069 Dresden Germany
| | - Christian Taplan
- Leibniz-Institut für Polymerforschung Dresden, Max Bergmann Center of Biomaterials Dresden Hohe Straße 6 D-01069 Dresden Germany
| | - Thomas Miles
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University King Edward VII Avenue Cardiff CF10 3NB UK
| | - Dagmar Pette
- Leibniz-Institut für Polymerforschung Dresden, Max Bergmann Center of Biomaterials Dresden Hohe Straße 6 D-01069 Dresden Germany
| | - Petra B Welzel
- Leibniz-Institut für Polymerforschung Dresden, Max Bergmann Center of Biomaterials Dresden Hohe Straße 6 D-01069 Dresden Germany
| | - Carsten Werner
- Leibniz-Institut für Polymerforschung Dresden, Max Bergmann Center of Biomaterials Dresden Hohe Straße 6 D-01069 Dresden Germany
| | - Wenxin Wang
- Charles Institute of Dermatology, School of Medicine, University College Dublin Ireland
| | - Catia Neto
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University King Edward VII Avenue Cardiff CF10 3NB UK
| | - Mark Gumbleton
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University King Edward VII Avenue Cardiff CF10 3NB UK
| | - Ben Newland
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University King Edward VII Avenue Cardiff CF10 3NB UK
- Leibniz-Institut für Polymerforschung Dresden, Max Bergmann Center of Biomaterials Dresden Hohe Straße 6 D-01069 Dresden Germany
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Muwar M, Samkari A, Alghamdi M. Contribution of Pathologists in Leading Clinical Cancer Research Through Interdisciplinary Collaboration in Saudi Arabia. Cureus 2020; 12:e10513. [PMID: 33094054 PMCID: PMC7571775 DOI: 10.7759/cureus.10513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Background Interdisciplinary collaboration is often the key to advance cancer research. This research collaboration is frequently observed between oncologists and pathologists. While clinical cancer research is often led by oncologists, the leading role of pathologists is likely limited to laboratory-based and preclinical research. Therefore, the magnitude and characteristics of clinical studies led by pathologists is largely unknown. Objectives The objective of our study was to assess the quantity and quality of clinical cancer-related publications led by Saudi pathologists over a 10-year period. Methods A PubMed search was conducted between January 2008 and December 2017 to extract all published clinical articles regarding cancer by at least one Saudi pathologist with the collaboration of other cancer specialists. Information about articles and authors were collected. The level of evidence (LOE) was independently assessed by two authors. Two five-year periods (2008 - 2012 and 2013 - 2017) were compared using the relevant parameters. Results A total of 127 publications met our inclusion criteria and were included. Review articles (27%) were the most common type of publication. There were no experimental studies. The LOE was III and IV in 59.1% and 40.9% of the included publications, respectively. Comparing the two five-year periods, the number of publications (p < 0.001), publications in international journals (p = 0.004), and international collaborations (p < 0.001) increased in the second period. The LOE and journal impact factor were the same in the two periods. Conclusions The pathologist-led clinical cancer research in Saudi Arabia increased over time. Despite the observed increase in international collaboration and publications in international journals, the LOE was low (III/IV) and did not change over time.
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Affiliation(s)
- Moataz Muwar
- Department of Pathology and Laboratory Medicine, King Abdualziz Medical City, Ministry of National Guard, Jeddah, SAU
| | - Alaa Samkari
- Department of Pathology and Laboratory Medicine, King Abdualziz Medical City, Ministry of National Guard, Jeddah, SAU.,Department of Pathology, King Saud Bin Abdulaziz University for Health Sciences, Jeddah, SAU
| | - Majed Alghamdi
- Department of Internal Medicine/Oncology, Al Baha University, Jeddah, SAU.,Department of Radiation Oncology, Princess Noorah Oncology Center, King Abdualziz Medical City, Ministry of National Guard, Jeddah, SAU
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18
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Alghamdi M. Cross-cultural validation and psychometric properties of the Arabic Brief COPE in Saudi population. Med J Malaysia 2020; 75:502-509. [PMID: 32918417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
INTRODUCTION Coping strategies for stress tend to vary in different cultural. The Brief COPE (BC) is the most commonly used self-report instrument to identify the types of coping strategies used which has a total of 14 strategies with 28 items. The aim of this study was to translate into Arabic and validate the Brief COPE scale in the Saudi Arabian population. METHODS A cross-sectional method was used to assess the reliability, validity, and cultural appropriateness of the Arabic version of the Brief COPE (A-BC) among 302 males and females (33.8% females). RESULTS The test-retest reliability was strong at 0.8, and the principal component factor analysis yielded a 3-factor structure, namely 'active coping', 'passive coping', and 'support-seeking', with Composite Reliability scores of 0.84, 0.75, and 0.81 respectively. Confirmatory factor analysis indicated an acceptable factors structure. CONCLUSION The 3-factor structure of the A-BC was found to be a valid and reliable instrument among the Saudi population. This makes the scale useful in both clinical practice and clinical research.
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Affiliation(s)
- M Alghamdi
- Taif University, University College-Tarabah, Division of Education Sciences, P.O. Box 888, Taif 21974, Saudi Arabia.
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Alshehri SM, Alkattan K, Abdelwarith A, Alhussain H, Shaker S, Alghamdi M, Alassaf H, Albargawi A, Naimi MA, Alomair A, Althaqfi S, Alhebshi A, Alothman M, Jazieh A. Highlights on the Management of Oligometastatic Disease. Journal of Immunotherapy and Precision Oncology 2020; 3:34-44. [PMID: 35756179 PMCID: PMC9208385 DOI: 10.4103/jipo.jipo_24_19] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 12/11/2019] [Accepted: 12/19/2019] [Indexed: 12/25/2022]
Abstract
Purpose: The understanding of oligometastatic disease (OMD) is rapidly evolving and with this comes the ability to utilize a number of modalities that excel in the localized control of disease. It has been identified that there are no clear guidelines based on high-level evidence to standardized approaches toward the management of OMD. These highlights have been developed to provide a road map for all health-care professionals who are involved in the management of OMD to support standardized patient care. Methods: The Saudi Lung Cancer Guidelines Committee is a part of the Saudi Lung Cancer Association which, in turn, is part of the Saudi Thoracic Society. Considering that lung cancer constitutes a major proportion of OMD prevalence, the committee took the initiative to develop national highlights to support the management of OMD within Saudi Arabia. The committee members are national clinical leaders who collaborated with international expertise to establish these highlights to serve as a general clinical pathway in the management of OMD. Results: Standardization of the indications to diagnose oligometastases and patient selection criteria including ineligibility criteria for treatment are the basis of the highlights. Treatment approaches including surgical and the variety of radiotherapeutical options are discussed in relation to specific oligometastatic sites. Acceptable measurements for response to treatment and the future for the treatment of OMD conclude the development of the highlights. Conclusion: These are the first national highlights addressing this important disease in oncology. The implementation of these highlights as guidelines requires a robust multidisciplinary team and access to specific technology and expertise. These highlights are based on the most recent findings within the literature but will require repeated review and updating due to this rapidly evolving field in disease management.
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Affiliation(s)
- Salem M. Alshehri
- Department of Oncology, King Abdulaziz Medical City, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia
- King Saud bin Abdulaziz University for Health Sciences, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia
| | - Khaled Alkattan
- King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Ahmed Abdelwarith
- Department of Medicine, King Saud University Hospital, Riyadh, Saudi Arabia
| | - Hussain Alhussain
- Department of Radiation Oncology, King Fahad Medical City, Riyadh, Saudi Arabia
| | - Shaker Shaker
- Department of Radiation Oncology, King Fahad Medical City, Riyadh, Saudi Arabia
| | | | - Hossam Alassaf
- Department of Radiation Oncology, King Fahad Medical City, Riyadh, Saudi Arabia
| | - Ali Albargawi
- Department of Oncology, King Abdulaziz Medical City, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia
- King Saud bin Abdulaziz University for Health Sciences, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia
| | - Manal Al Naimi
- Department of Radiation Oncology, King Fahad Specialist Hospital, Dammam, Saudi Arabia,
| | - Ameen Alomair
- King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Saif Althaqfi
- Department of Oncology, King Abdulaziz Medical City, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia
- King Saud bin Abdulaziz University for Health Sciences, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia
| | - Adnan Alhebshi
- Radiation Oncology Unit, John Hopkins Aramco Healthcare, Dharan, Saudi Arabia
| | - Majid Alothman
- Radiation Oncology Unit, John Hopkins Aramco Healthcare, Dharan, Saudi Arabia
| | - AbdulRahman Jazieh
- Department of Oncology, King Abdulaziz Medical City, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia
- King Saud bin Abdulaziz University for Health Sciences, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia
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Alghamdi M, Sahgal A, Soliman H, Myrehaug S, Yang VXD, Das S, Wilson J, Campbell M, Lee YK, Cawricz M, Da Costa L, Atenafu EG, Tseng CL. Postoperative Stereotactic Body Radiotherapy for Spinal Metastases and the Impact of Epidural Disease Grade. Neurosurgery 2019; 85:E1111-E1118. [DOI: 10.1093/neuros/nyz349] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 06/18/2019] [Indexed: 11/12/2022] Open
Abstract
Abstract
BACKGROUND
Postoperative stereotactic body radiotherapy (pSBRT) is an emerging indication for spinal metastases (SM).
OBJECTIVE
To report our experience with pSBRT for SM.
METHODS
A retrospective chart review was performed for prospectively collected data of patients treated between September 2008 to December 2015 with pSBRT and followed with serial spinal MRIs every 2 to 3 mo until death or last follow-up. Univariate and multivariable analyses were performed to identify predictive factors.
RESULTS
A total of 83 spinal segments in 47 patients treated with a median dose of 24 Gy in 2 fractions were included, with mostly lung and breast primaries. A total of 59.3% had preoperative high-grade epidural disease (ED) and 39.7% were unstable. The 12-mo cumulative incidence of local failure was 17% for all segments, and 33.3%, 21.8%, and 0% in segments with postoperative high-grade, low-grade, and no ED, respectively. Downgrading preoperative ED was predictive of better local control (P = .03). The grade of postoperative ED was also predictive for local control (P < .0001), as was a longer interval between prior radiotherapy and pSBRT in those previously irradiated (P = .004). The 12-mo overall survival rate was 55%. One case of radiculopathy, 3 vertebral compression fractures, and no cases of myelopathy, hardware failure, or skin breakdown were observed.
CONCLUSION
pSBRT is an effective and safe treatment. The association between downgrading preoperative ED and better local control following pSBRT is confirmed and supports the concept of separation surgery.
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Affiliation(s)
- Majed Alghamdi
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Canada
- Department of Medicine, Faculty of Medicine, Al Baha University, Al Baha, Saudi Arabia
| | - Arjun Sahgal
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Canada
| | - Hany Soliman
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Canada
| | - Sten Myrehaug
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Canada
| | - Victor X D Yang
- Division of Neurosurgery, Department of Surgery, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Canada
| | - Sunit Das
- Department of Neurosurgery, St. Michael's Hospital, University of Toronto, Toronto, Canada
| | - Jefferson Wilson
- Department of Neurosurgery, St. Michael's Hospital, University of Toronto, Toronto, Canada
| | - Mikki Campbell
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Canada
| | - Young K Lee
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Canada
| | - Monica Cawricz
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Canada
| | - Leo Da Costa
- Division of Neurosurgery, Department of Surgery, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Canada
| | - Eshetu G Atenafu
- Department of Biostatistics, University Health Network, University of Toronto, Toronto, Canada
| | - Chia-Lin Tseng
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Canada
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Almohammadi AL, Alghamdi M, Almohammadi EL. Socio-demographic and Lifestyle Determinants of Insomnia among Adult Patients Attending Primary Healthcare Centres, Jeddah: A Cross-sectional Study. J Clin Diagn Res 2019. [DOI: 10.7860/jcdr/2019/38403.12493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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22
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Guebert A, Conroy L, Weppler S, Alghamdi M, Conway J, Harper L, Phan T, Olivotto IA, Smith WL, Quirk S. Clinical implementation of AXB from AAA for breast: Plan quality and subvolume analysis. J Appl Clin Med Phys 2018; 19:243-250. [PMID: 29696752 PMCID: PMC5978944 DOI: 10.1002/acm2.12329] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 12/06/2017] [Accepted: 03/02/2018] [Indexed: 12/01/2022] Open
Abstract
Purpose Two dose calculation algorithms are available in Varian Eclipse software: Anisotropic Analytical Algorithm (AAA) and Acuros External Beam (AXB). Many Varian Eclipse‐based centers have access to AXB; however, a thorough understanding of how it will affect plan characteristics and, subsequently, clinical practice is necessary prior to implementation. We characterized the difference in breast plan quality between AXB and AAA for dissemination to clinicians during implementation. Methods Locoregional irradiation plans were created with AAA for 30 breast cancer patients with a prescription dose of 50 Gy to the breast and 45 Gy to the regional node, in 25 fractions. The internal mammary chain (IMCCTV) nodes were covered by 80% of the breast dose. AXB, both dose‐to‐water and dose‐to‐medium reporting, was used to recalculate plans while maintaining constant monitor units. Target coverage and organ‐at‐risk doses were compared between the two algorithms using dose–volume parameters. An analysis to assess location‐specific changes was performed by dividing the breast into nine subvolumes in the superior–inferior and left–right directions. Results There were minimal differences found between the AXB and AAA calculated plans. The median difference between AXB and AAA for breastCTVV95%, was <2.5%. For IMCCTV, the median differences V95%, and V80% were <5% and 0%, respectively; indicating IMCCTV coverage only decreased when marginally covered. Mean superficial dose increased by a median of 3.2 Gy. In the subvolume analysis, the medial subvolumes were “hotter” when recalculated with AXB and the lateral subvolumes “cooler” with AXB; however, all differences were within 2 Gy. Conclusion We observed minimal difference in magnitude and spatial distribution of dose when comparing the two algorithms. The largest observable differences occurred in superficial dose regions. Therefore, clinical implementation of AXB from AAA for breast radiotherapy is not expected to result in changes in clinical practice for prescribing or planning breast radiotherapy.
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Affiliation(s)
- Alexandra Guebert
- Department of Physics and Astronomy, University of Calgary, Calgary, AB, Canada
| | - Leigh Conroy
- Department of Physics and Astronomy, University of Calgary, Calgary, AB, Canada.,Division of Medical Physics, Tom Baker Cancer Centre, Calgary, AB, Canada
| | - Sarah Weppler
- Department of Physics and Astronomy, University of Calgary, Calgary, AB, Canada.,Division of Medical Physics, Tom Baker Cancer Centre, Calgary, AB, Canada
| | - Majed Alghamdi
- Division of Radiation Oncology, Department of Oncology, University of Calgary, Calgary, AB, Canada.,Department of Oncology, Tom Baker Cancer Centre, Calgary, AB, Canada
| | - Jessica Conway
- Division of Radiation Oncology, Department of Oncology, University of Calgary, Calgary, AB, Canada.,Department of Oncology, Tom Baker Cancer Centre, Calgary, AB, Canada
| | - Lindsay Harper
- Department of Oncology, Tom Baker Cancer Centre, Calgary, AB, Canada
| | - Tien Phan
- Division of Radiation Oncology, Department of Oncology, University of Calgary, Calgary, AB, Canada.,Department of Oncology, Tom Baker Cancer Centre, Calgary, AB, Canada
| | - Ivo A Olivotto
- Division of Radiation Oncology, Department of Oncology, University of Calgary, Calgary, AB, Canada.,Department of Oncology, Tom Baker Cancer Centre, Calgary, AB, Canada
| | - Wendy L Smith
- Department of Physics and Astronomy, University of Calgary, Calgary, AB, Canada.,Division of Medical Physics, Tom Baker Cancer Centre, Calgary, AB, Canada.,Division of Radiation Oncology, Department of Oncology, University of Calgary, Calgary, AB, Canada
| | - Sarah Quirk
- Department of Physics and Astronomy, University of Calgary, Calgary, AB, Canada.,Division of Medical Physics, Tom Baker Cancer Centre, Calgary, AB, Canada.,Division of Radiation Oncology, Department of Oncology, University of Calgary, Calgary, AB, Canada
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Alghamdi M, Glogauer M, Jackson TD, okrainec A, Allard JP. A318 DO IMPROVEMENTS IN METABOLIC SYNDROME POST BARIATRIC CARE ASSOCIATED WITH BETTER ORAL HEALTH? J Can Assoc Gastroenterol 2018. [DOI: 10.1093/jcag/gwy009.318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- M Alghamdi
- University of Toronto, Toronto, ON, Canada
| | - M Glogauer
- University of Toronto, Toronto, ON, Canada
| | - T D Jackson
- University of Health Network, Toronto, ON, Canada
| | - A okrainec
- University of Health Network, Toronto, ON, Canada
| | - J P Allard
- University of Health Network, Toronto, ON, Canada
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Barton DBH, Georghiou D, Dave N, Alghamdi M, Walsh TA, Louis EJ, Foster SS. PHENOS: a high-throughput and flexible tool for microorganism growth phenotyping on solid media. BMC Microbiol 2018; 18:9. [PMID: 29368646 PMCID: PMC5784713 DOI: 10.1186/s12866-017-1143-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Accepted: 12/18/2017] [Indexed: 01/01/2023] Open
Abstract
Background Microbial arrays, with a large number of different strains on a single plate printed with robotic precision, underpin an increasing number of genetic and genomic approaches. These include Synthetic Genetic Array analysis, high-throughput Quantitative Trait Loci (QTL) analysis and 2-hybrid techniques. Measuring the growth of individual colonies within these arrays is an essential part of many of these techniques but is useful for any work with arrays. Measurement is typically done using intermittent imagery fed into complex image analysis software, which is not especially accurate and is challenging to use effectively. We have developed a simple and fast alternative technique that uses a pinning robot and a commonplace microplate reader to continuously measure the thickness of colonies growing on solid agar, complemented by a technique for normalizing the amount of cells initially printed to each spot of the array in the first place. We have developed software to automate the process of combining multiple sets of readings, subtracting agar absorbance, and visualizing colony thickness changes in a number of informative ways. Results The “PHENOS” pipeline (PHENotyping On Solid media), optimized for Saccharomyces yeasts, produces highly reproducible growth curves and is particularly sensitive to low-level growth. We have empirically determined a formula to estimate colony cell count from an absorbance measurement, and shown this to be comparable with estimates from measurements in liquid. We have also validated the technique by reproducing the results of an earlier QTL study done with conventional liquid phenotyping, and found PHENOS to be considerably more sensitive. Conclusions “PHENOS” is a cost effective and reliable high-throughput technique for quantifying growth of yeast arrays, and is likely to be equally very useful for a range of other types of microbial arrays. A detailed guide to the pipeline and software is provided with the installation files at https://github.com/gact/phenos. Electronic supplementary material The online version of this article (10.1186/s12866-017-1143-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- David B H Barton
- Department of Genetics & Genome Biology, University of Leicester, Leicester, LE1 7RH, UK
| | - Danae Georghiou
- Department of Genetics & Genome Biology, University of Leicester, Leicester, LE1 7RH, UK
| | - Neelam Dave
- Department of Genetics & Genome Biology, University of Leicester, Leicester, LE1 7RH, UK
| | - Majed Alghamdi
- Department of Genetics & Genome Biology, University of Leicester, Leicester, LE1 7RH, UK
| | - Thomas A Walsh
- Department of Genetics & Genome Biology, University of Leicester, Leicester, LE1 7RH, UK
| | - Edward J Louis
- Department of Genetics & Genome Biology, University of Leicester, Leicester, LE1 7RH, UK.
| | - Steven S Foster
- Department of Genetics & Genome Biology, University of Leicester, Leicester, LE1 7RH, UK.
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25
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Alghamdi M, Hasan Y, Ruschin M, Atenafu EG, Myrehaug S, Tseng CL, Spears J, Mainprize T, Sahgal A, Soliman H. Stereotactic radiosurgery for resected brain metastasis: Cavity dynamics and factors affecting its evolution. J Radiosurg SBRT 2018; 5:191-200. [PMID: 29988304 PMCID: PMC6018046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Accepted: 04/13/2018] [Indexed: 06/08/2023]
Abstract
OBJECTIVE To determine changes in post-surgical cavity volume for metastases based on time from surgery, pre-operative tumor dimensions and other predictors, in patients planned for post-operative stereotactic radiosurgery (SRS). METHODS Patients with resected brain metastases from a primary solid tumor, treated with post-operative surgical cavity SRS from 2008 to 2014 were identified from an institutional prospective database. The segmented three-dimensional (3D) volume of the pre-operative tumor and post-operative surgical cavity were determined based on MRI and percent volume change was calculated. Patients were grouped according to early (<21 days), intermediate (22-42 days), and late (>42 days) intervals based on the number of days between the date of surgery and the treatment planning MRI. Potential predictive factors including tumor size, location, age, dural involvement, and degree of surgical resection were also analyzed. RESULTS Sixty-one cavities in 59 patients were evaluated. Overall, a significant volume reduction (4cm3, p=0.03) was observed comparing tumor and cavity volumes. For larger tumors, an average volume reduction of 11.6% (p=0.01) was observed compared to an increase of 34.4% in smaller tumors (p=0.69). For both large and small tumors, cavities were larger in the early interval especially for smaller tumors. During the intermediate interval, a significant volume reduction was observed for larger tumors (28%, p=0.0007). Tumor size, dural involvement, age and time from surgery were significant predictors for volume change on univariate analysis. On multivariate analysis, tumor size, dural involvement and time from surgery were significant. CONCLUSION Tumor size (>3cm), dural involvement and longer time from surgery were significant predictors of cavity volume reduction. Caution must be taken when treating cavities in the early (<21 days) interval after surgery as it may lead to irradiating more normal tissue especially in small tumors.
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Affiliation(s)
- Majed Alghamdi
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON, Canada
- Department of Medicine, Al Baha University, Al Baha, Saudi Arabia
| | - Yaser Hasan
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON, Canada
| | - Mark Ruschin
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON, Canada
| | - Eshetu G. Atenafu
- Department of Biostatistics, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Sten Myrehaug
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON, Canada
| | - Chia-Lin Tseng
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON, Canada
| | - Julian Spears
- Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, ON, Canada
| | - Todd Mainprize
- Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, ON, Canada
| | - Arjun Sahgal
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON, Canada
| | - Hany Soliman
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON, Canada
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Faruqi S, Tseng CL, Whyne C, Alghamdi M, Wilson J, Myrehaug S, Soliman H, Lee Y, Maralani P, Yang V, Fisher C, Sahgal A. Vertebral Compression Fracture After Spine Stereotactic Body Radiation Therapy: A Review of the Pathophysiology and Risk Factors. Neurosurgery 2017; 83:314-322. [DOI: 10.1093/neuros/nyx493] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Accepted: 09/07/2017] [Indexed: 01/23/2023] Open
Abstract
Abstract
BACKGROUND
Vertebral compression fracture (VCF) is a challenging and not infrequent complication observed following spine stereotactic body radiation therapy (SBRT).
OBJECTIVE
To summarize the data from the multiple studies that have been published, addressing the risk and predictive factors for VCF post-SBRT.
METHODS
A systematic literature review was conducted. Studies were selected if they specifically addressed risk factors for post-SBRT VCF in their analyses.
RESULTS
A total of 11 studies were identified, reporting both the risk of VCF post-SBRT and an analysis of risk factors based on univariate and multivariate analysis. A total of 2911 spinal segments were treated with a crude VCF rate of 13.9%. The most frequently identified risk factors on multivariate analysis were: lytic disease (hazard ratio [HR] range, 2.76-12.2), baseline VCF prior to SBRT (HR range, 1.69-9.25), higher dose per fraction SBRT (HR range, 5.03-6.82), spinal deformity (HR range, 2.99-11.1), older age (HR range, 2.15-5.67), and more than 40% to 50% of vertebral body involved by tumor (HR range, 3.9-4.46). In the 9 studies that specifically reported on the use of post-SBRT surgical procedures, 37% of VCF had undergone an intervention (range, 11%-60%).
CONCLUSION
VCF is an important adverse effect following SBRT. Risk factors have been identified to guide the selection of high-risk patients. Evidence-based algorithms with respect to patient selection and intervention are needed.
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Affiliation(s)
- Salman Faruqi
- Department of Radiation Oncology, Sunnybrook Odette Cancer Centre, University of Toronto, Toronto, Ontario, Canada
| | - Chia-Lin Tseng
- Department of Radiation Oncology, Sunnybrook Odette Cancer Centre, University of Toronto, Toronto, Ontario, Canada
| | - Cari Whyne
- Orthopaedic Biomechanics Laboratory, Sunnybrook Research Institute, Department of Surgery, University of Toronto, Toronto, Ontario, Canada
| | - Majed Alghamdi
- Department of Radiation Oncology, Sunnybrook Odette Cancer Centre, University of Toronto, Toronto, Ontario, Canada
| | - Jefferson Wilson
- Department of Neurosurgery, St. Michael's Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Sten Myrehaug
- Department of Radiation Oncology, Sunnybrook Odette Cancer Centre, University of Toronto, Toronto, Ontario, Canada
| | - Hany Soliman
- Department of Radiation Oncology, Sunnybrook Odette Cancer Centre, University of Toronto, Toronto, Ontario, Canada
| | - Young Lee
- Department of Radiation Oncology, Sunnybrook Odette Cancer Centre, University of Toronto, Toronto, Ontario, Canada
| | - Pejman Maralani
- Department of Radiology, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - Victor Yang
- Department of Neurosurgery, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - Charles Fisher
- Department of Neurosurgery, Vancouver General Hospital, University of British Columbia, Vancouver, British Columbia, Canada
| | - Arjun Sahgal
- Department of Radiation Oncology, Sunnybrook Odette Cancer Centre, University of Toronto, Toronto, Ontario, Canada
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Alghamdi M, Tseng CL, Myrehaug S, Maralani P, Heyn C, Soliman H, Lee Y, Ruschin M, da Costa L, Yang V, Campbell M, Sahgal A. Postoperative stereotactic body radiotherapy for spinal metastases. Chin Clin Oncol 2017; 6:S18. [DOI: 10.21037/cco.2017.06.27] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Accepted: 06/13/2017] [Indexed: 11/06/2022]
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28
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Harrison RM, Bousiotis D, Mohorjy AM, Alkhalaf AK, Shamy M, Alghamdi M, Khoder M, Costa M. Health risk associated with airborne particulate matter and its components in Jeddah, Saudi Arabia. Sci Total Environ 2017; 590-591:531-539. [PMID: 28285859 DOI: 10.1016/j.scitotenv.2017.02.216] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 02/23/2017] [Accepted: 02/27/2017] [Indexed: 06/06/2023]
Abstract
Samples of PM2.5 and PM10 have been collected in all of four seasons at seven sites within the city of Jeddah, Saudi Arabia. The samples have been analysed for a range of trace elements. There is a large loading of wind-blown dust and the majority of elements are predominantly associated with coarse particles. Enrichment factors, however, show that some elements are markedly enriched above crustal abundance. Using mean data for the PM2.5 and PM10 fractions from each of the seven sampling sites, health risks have been estimated for particulate matter mass, the elements Cr, Mn, Ni, Pb, As, Cd and V measured in this study, and polycyclic aromatic hydrocarbons using data from an earlier study within Jeddah. Cancer risks are calculated from mean airborne concentrations and cancer slope factors for the carcinogenic metals and PAH, but the cancer risks are relatively modest compared to the lifetime risk of mortality due to PM2.5 exposure. The risks associated with exposure to V and Mn are considered to be small, while concentrations of cadmium far exceed the European Union Limit Value and World Health Organisation guideline. Cadmium shows a very high crustal enrichment factor but is present predominantly in the coarse particle fraction suggesting that local soils and surface dusts are unusually enriched in Cd relative to the global average. Using national data for mortality rates, the excess mortality due to PM2.5 exposure has been calculated and amounts to over 1100 deaths annually for the city of Jeddah.
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Affiliation(s)
- Roy M Harrison
- Division of Environmental Health and Risk Management, School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom; Department of Environmental Sciences, Faculty of Meteorology, Environment and Arid Land Agriculture, King Abdulaziz University, Jeddah, Saudi Arabia; Center of Excellence in Environmental Studies, King Abdulaziz University, Jeddah, Saudi Arabia.
| | - Dimitrios Bousiotis
- Division of Environmental Health and Risk Management, School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - A M Mohorjy
- Department of Civil Engineering, Faculty of Engineering, King Abdulaziz University, Jeddah, Saudi Arabia.
| | - A K Alkhalaf
- Department of Meteorology, Faculty of Meteorology, Environment and Arid Land Agriculture, King Abdulaziz University, Jeddah, Saudi Arabia.
| | - M Shamy
- Department of Environmental Sciences, Faculty of Meteorology, Environment and Arid Land Agriculture, King Abdulaziz University, Jeddah, Saudi Arabia.
| | - M Alghamdi
- Department of Environmental Sciences, Faculty of Meteorology, Environment and Arid Land Agriculture, King Abdulaziz University, Jeddah, Saudi Arabia
| | - M Khoder
- Department of Environmental Sciences, Faculty of Meteorology, Environment and Arid Land Agriculture, King Abdulaziz University, Jeddah, Saudi Arabia; Center of Excellence in Environmental Studies, King Abdulaziz University, Jeddah, Saudi Arabia
| | - M Costa
- Department of Environmental Medicine, New York University School of Medicine, New York, NY, USA.
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Alghamdi M, Taggar A, Tilley D, Kerba M, Kostaras X, Gotto G, Sia M. An audit of referral and treatment patterns of high-risk prostate cancer patients in Alberta. Can Urol Assoc J 2017; 10:410-415. [PMID: 28096916 DOI: 10.5489/cuaj.3910] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
INTRODUCTION We aimed to determine the impact of clinical practice guidelines (CPG) on rates of radiation oncologist (RO) referral, androgen-deprivation therapy (ADT), radiation therapy (RT), and radical prostatectomy (RP) in patients with high-risk prostate cancer (HR-PCa). METHODS All men >18 years, diagnosed with PCa in 2005 and 2012 were identified from the Alberta Cancer Registry. Patient age, aggregated clinical risk group (ACRG) score, Gleason score (GS), pre-treatment prostate-specific antigen (PSA), RO referral, and treatment received were extracted from electronic medical records. Logistic regression modelling was used to examine associations between RO referral rates and relevant factors. RESULTS HR-PCa was diagnosed in 261 of 1792 patients in 2005 and 435 of 2148 in 2012. Median age and ACRG scores were similar in both years (p>0.05). The rate of patients with PSA >20 were 67% and 57% in 2005 and 2012, respectively (p=0.004). GS ≤6 was found in 13% vs. 5% of patients, GS 7 in 27% vs. 24%, and GS ≥8 in 59% vs. 71% in 2005 and 2012, respectively (p<0.001). In 2005, RO referral rate was 68% compared to 56% in 2012 (p=0.001), use of RT + ADT was 53% compared to 32% (p<0.001), and RP rate was 9% vs. 17% (p=0.002). On regression analysis, older age, 2012 year of diagnosis and higher PSA were associated with decreased RO referral rates (odds ratios [OR] 0.49, 95% confidence interval [CI] 0.39-0.61; OR 0.51, 95% CI 0.34-0.76; and OR 0.64, 95% CI 0.39-0.61), respectively [p<0.001]). CONCLUSIONS Since CPG creation in 2005, RO referral rates and ADT + RT use declined and RP rates increased, which demonstrates a need to improve adherence to CPG in the HR-PCa population.
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Affiliation(s)
- Majed Alghamdi
- Division of Radiation Oncology, University of Calgary and Tom Baker Cancer Centre, Calgary, AB, Canada; Albaha University, Albaha, Saudi Arabia
| | - Amandeep Taggar
- Division of Radiation Oncology, University of Calgary and Tom Baker Cancer Centre, Calgary, AB, Canada
| | - Derek Tilley
- CancerControl, Alberta Health Services, Calgary, AB, Canada
| | - Marc Kerba
- Division of Radiation Oncology, University of Calgary and Tom Baker Cancer Centre, Calgary, AB, Canada
| | | | - Geoffrey Gotto
- Division of Urology, University of Calgary, Calgary, AB, Canada
| | - Michael Sia
- Division of Radiation Oncology, University of Calgary and Tom Baker Cancer Centre, Calgary, AB, Canada
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AL-Jahdali H, Khan M, Alghamdi M. Reactivation pulmonary tuberculosis in two patients treated with pirfenidone. Int J Mycobacteriol 2017; 6:193-195. [DOI: 10.4103/ijmy.ijmy_64_17] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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31
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Taggar A, Alghamdi M, Tilly D, Kostaras X, Kerba M, Husain S, Gotto G, Sia M. Assessing guideline impact on referral patterns of post-prostatectomy patients to radiation oncologists. Can Urol Assoc J 2016; 10:314-318. [PMID: 27800051 DOI: 10.5489/cuaj.3539] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Adjuvant radiotherapy (aRT) can improve biochemical progression-free survival in patients with high-risk features (HRF) after radical prostatectomy (RP). Guidelines from Alberta and the Genitourinary Radiation Oncologists of Canada (GUROC) recommend that patients with HRF be referred to radiation oncologists (RO) based on the findings from three randomized, controlled trials (RCT). Our study examines the impact of these recommendations both pre- (2005) and post- (2012) publication of RCT and GUROC guideline establishment. METHODS Patients undergoing RP during 2005 and 2012 were identified from the provincial cancer registry. Charts were retrospectively reviewed and variables of interest were linked to the registry data. RO referral patterns for each year were determined and variables influencing referral (extracapsular extension, positive margin, seminal vesicle invasion, and post-RP prostate-specific antigen [PSA]) were compared. RESULTS Median time to referral was 26.4 months in 2005 compared to 3.7 months 2012 (p<0.001). Among patients referred post-RP, a higher proportion was referred within six months in 2012 (21%) as compared to 2005 (13%) (p=0.003). Among eligible patients in 2012, 30% were referred for discussion of aRT compared to 24% in 2005 (p=0.003). There was a marked drop in patients referred for salvage radiation therapy beyond six months and a rise in the number of patients who are never referred. CONCLUSIONS Despite an increase in referral rates to RO post-RP from 2005-2012, more than 50% of those patients with HRF did not receive a referral. Initiatives aimed at improving multidisciplinary care and guideline adherence should be undertaken.
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Affiliation(s)
- Amandeep Taggar
- Department of Oncology, Division of Radiation Oncology, University of Calgary, Tom Baker Cancer Centre, Calgary, AB, Canada
| | - Majed Alghamdi
- Department of Oncology, Division of Radiation Oncology, University of Calgary, Tom Baker Cancer Centre, Calgary, AB, Canada
| | - Derek Tilly
- Guideline Resource Unit, Cancer Control Alberta, Calgary, AB, Canada
| | | | - Marc Kerba
- Department of Oncology, Division of Radiation Oncology, University of Calgary, Tom Baker Cancer Centre, Calgary, AB, Canada
| | - Siraj Husain
- Department of Oncology, Division of Radiation Oncology, University of Calgary, Tom Baker Cancer Centre, Calgary, AB, Canada
| | - Geoff Gotto
- Department of Surgery, Division of Urology, University of Calgary, AB, Canada
| | - Michael Sia
- Department of Oncology, Division of Radiation Oncology, University of Calgary, Tom Baker Cancer Centre, Calgary, AB, Canada
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Jiang WN(W, Taggar A, Alghamdi M, Tilley D, Kostaras X, Kerba M, Husain S, Gotto G, Sia M. 223: Adjuvant Radiotherapy for Prostate Cancer: Did GUROC Recommendations Influence Practice Trends? Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)33622-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Alghamdi M, Kosztyla R, Voroney JP. 128: Implantable Devices and Radiation Exposure. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)33527-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Alghamdi M, Taggar A, Kerba M, Tilley D, Kostaras X, Sia M. A Slippery Slope? Declining Radiation Oncology Referral Rates in Alberta for High-Risk Prostate Cancer Between 2005 and 2012. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.1114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Taggar A, Alghamdi M, Tilley D, Kostaras X, Kerba M, Sia M. Assessing Guideline Adherence: Referral Patterns of Post Prostatectomy Patients to Radiation Oncologists. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.1178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Alghamdi M, Li H, Kelly J, Easaw J, Nordal R, Lim G. Referral Patterns and Outcomes of Atypical Meningioma Patients Treated With Surgery With or Without Radiation Therapy. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Hussien Y, Damiati L, Alharbi A, Alghamdi M, Alzahrani S, Elaskari A, Bahlas S. AB0282 Correlations of TGF-β1 (869C/T), CD4- (11743 A/C) and CD4- (10845 A/G) Polymorphism with Biochemical Risk Factor Predict in Rheumatoid Arthritis Patients Progression. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.1561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Sadeghi P, Banerjee R, Alghamdi M, Phan T, Taggar A, Smith W. SU-E-T-509: Inter-Observer and Inter-Modality Contouring Analysis for Organs at Risk for HDR Gynecological Brachytherapy. Med Phys 2015. [DOI: 10.1118/1.4924871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Pinto LM, Alghamdi M, Benedetti A, Zaihra T, Landry T, Bourbeau J. Derivation and validation of clinical phenotypes for COPD: a systematic review. Respir Res 2015; 16:50. [PMID: 25928208 PMCID: PMC4460884 DOI: 10.1186/s12931-015-0208-4] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Accepted: 03/19/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The traditional classification of COPD, which relies solely on spirometry, fails to account for the complexity and heterogeneity of the disease. Phenotyping is a method that attempts to derive a single or combination of disease attributes that are associated with clinically meaningful outcomes. Deriving phenotypes entails the use of cluster analyses, and helps individualize patient management by identifying groups of individuals with similar characteristics. We aimed to systematically review the literature for studies that had derived such phenotypes using unsupervised methods. METHODS Two independent reviewers systematically searched multiple databases for studies that performed validated statistical analyses, free of definitive pre-determined hypotheses, to derive phenotypes among patients with COPD. Data were extracted independently. RESULTS 9156 citations were retrieved, of which, 8 studies were included. The number of subjects ranged from 213 to 1543. Most studies appeared to be biased: patients were more likely males, with severe disease, and recruited in tertiary care settings. Statistical methods used to derive phenotypes varied by study. The number of phenotypes identified ranged from 2 to 5. Two phenotypes, with poor longitudinal health outcomes, were common across multiple studies: young patients with severe respiratory disease, few cardiovascular co-morbidities, poor nutritional status and poor health status, and a phenotype of older patients with moderate respiratory disease, obesity, cardiovascular and metabolic co-morbidities. CONCLUSIONS The recognition that two phenotypes of COPD were often reported may have clinical implications for altering the course of the disease. This review also provided important information on limitations of phenotype studies in COPD and the need for improvement in future studies.
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Affiliation(s)
- Lancelot M Pinto
- Respiratory Division, McGill University Health Centre, Montreal, Quebec, Canada. .,Respiratory Epidemiology and Clinical Research Unit, Montreal Chest Institute, McGill University Health Centre, Montreal, Quebec, Canada.
| | - Majed Alghamdi
- Respiratory Division, McGill University Health Centre, Montreal, Quebec, Canada. .,Respiratory Epidemiology and Clinical Research Unit, Montreal Chest Institute, McGill University Health Centre, Montreal, Quebec, Canada.
| | - Andrea Benedetti
- Respiratory Epidemiology and Clinical Research Unit, Montreal Chest Institute, McGill University Health Centre, Montreal, Quebec, Canada. .,Department of Epidemiology, Biostatistics & Occupational Health, Montreal, Quebec, Canada.
| | - Tasneem Zaihra
- School of PH & OT, Faculty of Medicine, McGill University, Quebec, Canada. .,Division of Clinical Epidemiology, McGill University Health Centre, Montreal, Quebec, Canada.
| | - Tara Landry
- Medical Library, Montreal General Hospital, McGill University Health Centre, Montreal, Quebec, Canada.
| | - Jean Bourbeau
- Respiratory Division, McGill University Health Centre, Montreal, Quebec, Canada. .,Respiratory Epidemiology and Clinical Research Unit, Montreal Chest Institute, McGill University Health Centre, Montreal, Quebec, Canada. .,Montreal Chest Institute, McGill University Health Centre, 3650 St.Urbain, Room K1.32, H2X 2P4, Montréal (Québec), Canada.
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Alghamdi M, De Souza AM, White CT, Potts MT, Warady BA, Furth SL, Kimball TR, Potts JE, Sandor GG. Response to: echocardiography assessment of the aorta in children with chronic kidney disease. Pediatr Cardiol 2014; 35:183-4. [PMID: 24551878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
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Rebai R, Alghamdi M, Houissa S, Assaggaf S. Stratégie chirurgicale des lipomes médullaires cervicaux de l’adulte (à propos d’un cas et revue de la littérature). Neurochirurgie 2010. [DOI: 10.1016/j.neuchi.2010.10.075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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