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Adnan MN, Ahmad WMAW, Shahzad HB, Awais F, Aleng NA, Noor NF, Mohd Ibrahim MSB, Noor NMM. The Evaluation of Ordinal Regression Model's Performance Through the Implementation of Multilayer Feed-Forward Neural Network: A Case Study of Hypertension. Cureus 2024; 16:e54387. [PMID: 38505445 PMCID: PMC10949101 DOI: 10.7759/cureus.54387] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/16/2024] [Indexed: 03/21/2024] Open
Abstract
Background Hypertension, or high blood pressure, is a common medical condition that affects a significant portion of the global population. It is a major risk factor for cardiovascular diseases (CVD), stroke, and kidney disorders. Objective The objective of this study is to create and validate a model that combines bootstrapping, ordered logistic regression, and multilayer feed-forward neural networks (MLFFNN) to identify and analyze the factors associated with hypertension patients who also have dyslipidemia. Material and methods A total of 33 participants were enrolled from the Hospital Universiti Sains Malaysia (USM) for this study. In this study, advanced computational statistical modeling techniques were utilized to examine the relationship between hypertension status and several potential predictors. The RStudio (Posit, Boston, MA) software and syntax were implemented to establish the relationship between hypertension status and the predictors. Results The statistical analysis showed that the developed methodology demonstrates good model fitting through the value of predicted mean square error (MSE), mean absolute deviance (MAD), and accuracy. To evaluate model fitting, the data in this study was divided into distinct training and testing datasets. The findings revealed that the results strongly support the superior predictive capability of the hybrid model technique. In this case, five variables are considered: marital status, smoking status, systolic blood pressure, fasting blood sugar levels, and high-density lipoprotein levels. It is important to note that all of them affect the hazard ratio: marital status (β1, -17.12343343; p < 0.25), smoking status (β2, 1.86069121; p < 0.25), systolic blood pressure (β3, 0.05037332; p < 0.25), fasting blood sugar (β4, -0.53880322; p < 0.25), and high-density lipoprotein (β5, 5.38065556; p < 0.25). Conclusion This research aims to develop and extensively evaluate the hybrid approach. The statistical methods employed in this study using R language show that regression modeling surpasses R-squared values in predicting the mean square error. The study's conclusion provides strong evidence for the superiority of the hybrid model technique.
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Affiliation(s)
- Mohamad N Adnan
- School of Dental Sciences, Universiti Sains Malaysia, Kota Bharu, MYS
| | | | - Hazik B Shahzad
- School of Dental Sciences, Universiti Sains Malaysia, Kota Bharu, MYS
- Department of Community and Preventive Dentistry, Rashid Latif Dental College, Lahore, PAK
| | - Faiza Awais
- Department of Community and Preventive Dentistry, Rashid Latif Dental College, Lahore, PAK
| | - Nor Azlida Aleng
- Faculty of Computer Science and Mathematics, Universiti Malaysia Terengganu, Kuala Terengganu, MYS
| | - Nor F Noor
- Faculty of Medicine, Universiti Sultan Zainal Abidin, Kuala Terengganu, MYS
| | | | - Noor Maizura M Noor
- Faculty of Computer Science and Mathematics, Universiti Malaysia Terengganu, Kuala Terengganu, MYS
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Kinero A, Bukuru K, Mwambeleko EE, Sando T, Alluri P. Modeling injury severity of crashes involving golf carts: A case study of The Villages, Florida. Traffic Inj Prev 2024; 25:165-172. [PMID: 38095588 DOI: 10.1080/15389588.2023.2291332] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 12/01/2023] [Indexed: 01/03/2024]
Abstract
OBJECTIVE Crashes involving golf carts (GCs) have been on an increasing trend in recent years, particularly in the United States. This study focuses on analyzing GC crashes in the Florida community known as The Villages, one of the largest GC-oriented communities in the nation and worldwide. The objective was to evaluate the injury severity of crashes involving GCs in a retirement community where GCs are a common mode of transportation. METHODS The ordinal logistic regression (OLR) and Decision Tree Ensemble (DTE) models were used to analyze the injury severity of 616 GC-related crashes. Models' accuracy parameters were used to check their reliability. RESULTS The analysis revealed that GC crash severity is influenced by various factors. Factors found to be significant by the OLR model in determining injury severity include ejection of one or more occupants from the GC, the extent of damage to the GC, GC speed prior to the crash, roadway characteristics (including divided roadways, traffic control devices, paved shoulders, and T-intersections), and roll-over incidents. The OLR model demonstrated an overall accuracy of approximately 71% in predicting injury severity. The DTE model performed better, with an overall accuracy of 78%. The OLR model's findings were supported by the DTE model, which identified estimated GC speed, occupant(s) ejection from the GC, estimated GC vehicle damage, intersection type, and type of shoulder as the most important factors influencing GC crash severity. CONCLUSIONS Understanding these factors is vital for transportation agencies to develop effective strategies to reduce the severity of GC crashes, ensuring the safety of GC users. This study provides recommendations to transportation agencies on measures to improve the safety of GCs.
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Affiliation(s)
- Abdallah Kinero
- Department of Civil and Environmental Engineering, Florida International University, Miami, Florida
| | - Kabhabhela Bukuru
- School of Engineering, University of North Florida, Jacksonville, Florida
| | - Enock E Mwambeleko
- Department of Civil and Environmental Engineering, Florida International University, Miami, Florida
| | - Thobias Sando
- School of Engineering, University of North Florida, Jacksonville, Florida
| | - Priyanka Alluri
- Department of Civil and Environmental Engineering, Florida International University, Miami, Florida
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Terefe B, Techane MA, Assimamaw NT. Comprehensive Knowledge, Attitudes, Behaviors, and Associated Factors of HIV/AIDS in Gondar City Public Health Facilities Among HIV Testing and Counselling Service Users, Northwest Ethiopia, 2022; an Ordinal Logistic Regression Analysis. HIV AIDS (Auckl) 2023; 15:713-726. [PMID: 38090476 PMCID: PMC10712675 DOI: 10.2147/hiv.s441447] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Accepted: 11/25/2023] [Indexed: 01/18/2024] Open
Abstract
BACKGROUND The primary cause of HIV transmission is a failure to deliver proper HIV/AIDS information, which is a major public health issue in low- and middle-income nations. While global health coverage continues, there is still little understanding of HIV/AIDS in Ethiopia, and there is a data gap. As a result, the aim of this study was to investigate the factors that influence comprehensive HIV/AIDS knowledge among HIV testing and counselling (HTC) service users in Gondar, northwest Ethiopia. METHODS A facility-based cross-sectional study was conducted from June to July 2022. About 423 clients were included. Data on HIV/AIDS knowledge, attitude, and behavior were collected. Stata 17 was used to analyze. A pre-tested questionnaires were used. Using ordinal logistic regression model, variables having p values of 0.2 and <0.05 were chosen as a candidate variable in binary and final model. RESULTS The total knowledge, favorable attitude, and good behaviors of HIV/AIDS were approximately 258 (61%), 220 (52%), and 210 (49.5%), respectively. Being male (AOR = 1.39, 95% CI = 1.28-3.01), age from 31 to 35 years (AOR = 2.13, 95% CI = 1.88-4.18), and above 36 years old (AOR = 2.21, 95% CI = 1.98-3.44), primary (AOR = 1.21, 95% CI = 1.67-3.20), and higher education (AOR = 1.19, 95% CI = 1.03-3.01), employed (AOR = 1.33, 95% CI = 1.09, 3.37), and media exposure (AOR = 2.02, 95% CI = 1.21, 3.61) were factors associated with comprehensive knowledge of HIV/AIDS, respectively. CONCLUSION The study participants' knowledge, attitudes, and behaviors regarding HIV/AIDS were rather low. Since HIV/AIDS is still a major public health issue, if the concerned body uses and designs media effectively, encouraging females to attend school, it will have a better chance of combating HIV/AIDS by increasing their knowledge.
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Affiliation(s)
- Bewuketu Terefe
- Department of Community Health Nursing, School of Nursing, College of Medicine and Health Sciences, University of Gondar, Gondar, Ethiopia
| | - Masresha Asmare Techane
- Department of Pediatric and Child Health, School of Nursing, College of Medicine and Health Sciences, University of Gondar, Gondar, Ethiopia
| | - Nega Tezera Assimamaw
- Department of Pediatric and Child Health, School of Nursing, College of Medicine and Health Sciences, University of Gondar, Gondar, Ethiopia
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Kushi EN, Belachew T, Tamiru D. Antenatal care follow-up was significantly associated with a higher probability of high dietary diversity score among pregnant women in okra-producing areas of western Ethiopia: proportional odds model. Food Nutr Res 2023; 67:9608. [PMID: 37533449 PMCID: PMC10392863 DOI: 10.29219/fnr.v67.9608] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 05/31/2023] [Accepted: 06/12/2023] [Indexed: 08/04/2023] Open
Abstract
Background Dietary diversity is important for pregnant women since it has been associated with nutrient adequacy. It is very crucial to ensure optimal fetal health and development. There is no evidence at the community level on the magnitude of dietary diversity and its predictors among pregnant women in okra-producing areas of western Ethiopia. Objective This study aimed to assess the level of dietary diversity and its associated factors among pregnant women. Design A community-based cross-sectional study was employed among randomly selected 224 pregnant women in western Ethiopia. An interviewer-administered questionnaire was used to collect the data. The qualitative open 24-h recall was used to assess the level of dietary diversity. Ordinal logistic regression analyses were used by SPSS version 25. An adjusted proportional odds ratio along with a 95% confidence interval [CI] was computed to measure the strengths of the association at a P ≤ 0.05. Result This study revealed that more than one-fourth, 64 (28.6%), of the respondents were found to have high dietary diversity scores. Antenatal Care [ANC] visits (Adjusted Odds Ratio [AOR] = 2.10, [95% CI: 1.13, 3.90], P = 0.01), changing food intake (AOR = 2.97, [95% CI: 1.16, 3.67], P = 0.002), and being food secure household (AOR = 2.63, [95% CI: 1.38, 5.00], P = 0.003) were significantly associated with a higher probability of having high dietary diversity score. However, lack of formal education (AOR = 0.34, [95% CI: 0.61, 0.89]) was inversely associated with the probability of having high dietary diversity. Conclusion More than half of pregnant women in western Ethiopia were found to have low dietary diversity. Therefore, ANC follow-up, dietary modification, and promotion of frequent use of wild edible plants (okra) to maintain household food security were very crucial.
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Affiliation(s)
- Efrem Negash Kushi
- Department of Public Health, College of Health and Medical Science, Mettu University, Mettu, Ethiopia
| | - Tefera Belachew
- Departments of Nutrition and Dietetics, Public Health Institute, Jimma University, Jimma, Ethiopia
| | - Dessalegn Tamiru
- Departments of Nutrition and Dietetics, Public Health Institute, Jimma University, Jimma, Ethiopia
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Mavragani A, Gu P, Wang Q, Zhang X. The Nurse-Physician Relationship During the COVID-19 Pandemic in Shanghai, China: Cross-sectional Study. JMIR Form Res 2023; 7:e41729. [PMID: 36745499 PMCID: PMC9907571 DOI: 10.2196/41729] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Revised: 01/17/2023] [Accepted: 01/17/2023] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND The nurse-physician relationship is important for the stability of collaboration. The COVID-19 pandemic has put unprecedented pressure on the health care system and has placed greater demands on nurse-physician collaboration. Nurses and physicians often struggle to share mutual responsibility and communicate effectively. OBJECTIVE This study aimed to evaluate the relationship between nurses and physicians during the COVID-19 pandemic and construct a new model combining the attitude and behaviors of the 2 groups to assess various factors' impacts on job satisfaction and confrontational behavior. METHODS We conducted this quantitative cross-sectional study to assess the relationship between nurses and physicians based on the attitudes and behaviors toward nurse-physician collaboration. We first investigated the satisfaction of nurses and physicians with their relationship and how they thought the COVID-19 pandemic had affected that relationship. We used an adapted and modified Jefferson Scale of Attitudes Toward Physician-Nurse Collaboration questionnaire that consisted of 17 items under 5 dimensions. Structural equation modeling was used to assess the relationships between domains. Ordinal logistic regression was used to evaluate the relationship between different domains of the questionnaire and the satisfaction of the current nurse-physician relationship. RESULTS We included a total of 176 nurses and 124 physicians in this study. Compared to 7.2% (9/124) of physicians, 22.7% (40/176) of nurses were dissatisfied with the current nurse-physician relationship. Most physicians (101/124, 81.5%) and nurses (131/176, 74.5%) agreed that the nurse-physician relationship had become better because of the COVID-19 pandemic and that the public had greater respect for them. However, significantly fewer nurses (59/176, 33.5% vs 79/124, 63.7%; P<.001) thought that physicians and nurses were treated with the same respect. Nurses scored significantly higher scores in caring versus curing (mean 16.27, SD 2.88 vs mean 17.43, SD 2.50; P<.001) and physician's authority (mean 8.72, SD 3.21 vs mean 7.24, SD 3.32; P<.001) subscales compared with physicians. The shared education and collaboration subscale had a significantly positive relationship with the nurse's autonomy subscale (standardized coefficient=0.98; P<.001). Logistic regression showed that 4 subscales (shared education and collaboration: P<.001; caring versus curing: P<.001; nurse's autonomy: P<.001; and confrontation: P=.01) were significantly associated with the level of satisfaction of the current nurse-physician relationship. CONCLUSIONS This study showed that nurses were more dissatisfied with the current nurse-physician relationship than physicians in Shanghai. Policy makers and managers in the medical and educational system should emphasize an interprofessional collaboration between nurses and physicians. Positive attitudes toward shared collaboration and responsibility may help to improve the relationship between the 2 parties.
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Affiliation(s)
| | - Pinhua Gu
- Department of Cardiology, Songjiang Hospital Affiliated to Shanghai Jiaotong University School of Medicine (Preparatory Stage), Shanghai, China
| | - Qiufeng Wang
- Department of Cardiology, Songjiang Hospital Affiliated to Shanghai Jiaotong University School of Medicine (Preparatory Stage), Shanghai, China
| | - Xuelian Zhang
- Department of Cardiology, Songjiang Hospital Affiliated to Shanghai Jiaotong University School of Medicine (Preparatory Stage), Shanghai, China
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Ayele MA, Fenta HM, Zike DT, Tesfaw LM. Spatial distribution and trends of anemia among pregnant women in Ethiopia: EDHS 2005-2016. Front Public Health 2023; 11:1089383. [PMID: 36875390 PMCID: PMC9981153 DOI: 10.3389/fpubh.2023.1089383] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Accepted: 01/31/2023] [Indexed: 02/18/2023] Open
Abstract
Background Anemia is a public health problem affecting both developed and developing nations worldwide with a significant consequence on health and economic growth. The problem is more severe in pregnant women. Hence, the main purpose of this study was to determine the factors of anemia levels among pregnant women in zones in Ethiopia. Methods We utilized data from 2005, 2011, and 2016 Ethiopian demographic and health survey (EDHSs), a population-based cross-sectional study. The study includes 8,421 pregnant women. An ordinal logistic regression model with spatial analysis was used to explore factors of anemia levels among pregnant women. Result About 224 (2.7%), 1,442 (17.2%), and 1,327 (15.8%) pregnant women were mild, moderate, and severely anemic, respectively. The spatial autocorrelation of anemia among the administrative zones of Ethiopia for the three consecutive was not significant. The middle wealth index of 15.9% (OR = 0.841, CI: 0.72-0.983) and richest wealth index of 51% (OR = 0.49, CI: 0.409-0.586) were less likely anemic compared to the poorest wealth index, age group of mother 30-39 was 42.9% (OR = 0.571, CI: 0.359-0.908) times less likely to be moderate and above anemic compared to <20 years, several household members 4-6 were 51% (OR = 1.51, CI: 1.175-1.94 more likely moderate and above anemic compared to 1-3. Conclusion Over one-third of the pregnant women (34.5%) were anemic in Ethiopia. Wealth index, age group, religion, region, number of household members, source of drinking water, and EDHS were significant factors in anemia levels. The prevalence of anemia among pregnant women varied among Ethiopian administrative zones. North West Tigray, Waghimra, Oromia special woreda, West shewa, and East shewa were a high prevalence of anemia.
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Affiliation(s)
- Molla Abate Ayele
- Department of Statistics, Mekidela Amba University, Mekane Selam, Ethiopia
| | | | | | - Lijalem Melie Tesfaw
- Department of Statistics, Bahir Dar University, Bahir Dar, Ethiopia.,Epidemiology and Biostatistics, School of Public Health, Faculty of Medicine, University of Queensland, Brisbane, Queensland, Australia
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Wang H, Quintana FG, Lu Y, Mohebujjaman M, Kamronnaher K. How Are BMI, Nutrition, and Physical Exercise Related? An Application of Ordinal Logistic Regression. Life (Basel) 2022; 12:life12122098. [PMID: 36556463 PMCID: PMC9785352 DOI: 10.3390/life12122098] [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] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 11/22/2022] [Accepted: 12/09/2022] [Indexed: 12/15/2022]
Abstract
BACKGROUND This paper performs a detailed ordinal logistic regression study in an evaluation of a survey at a university in South Texas, USA. We show that, for categorical data in our case, ordinal logistic regression works well. METHODS The survey was designed according to the guidelines in diet and lifestyle from the American Heart Association and the United States Department of Agriculture and was sent out to all registered students at Texas A&M International University in Laredo, Texas. Data analysis included 601 students' results from the survey. Data analysis was conducted in Rstudio. RESULTS The results showed that, compared with students who do not have enough whole grain food and exercise, those who have enough in both tend to have normal BMIs. As age increases, BMI tends to be out of the normal range. CONCLUSIONS Because BMI in this research has three categories, applying an ordinal logistic regression model to describe the relationship between an ordered categorical response variable and more explanatory variables has several advantages compared with other models, such as the linear regression model.
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Affiliation(s)
- Hongwei Wang
- Department of Mathematics and Physics, Texas A&M International University, Laredo, TX 78041, USA
- Correspondence: ; Tel.: +1-956-326-2413
| | - Fernando G. Quintana
- Department of Biology and Chemistry, Texas A&M International University, Laredo, TX 78041, USA
| | - Yunlong Lu
- School of Mathematics and Statistics, Beihua University, Jilin 132013, China
| | - Muhammad Mohebujjaman
- Department of Mathematics and Physics, Texas A&M International University, Laredo, TX 78041, USA
| | - Kanon Kamronnaher
- School of Mathematical and Statistical Sciences, Clemson University, Clemson, SC 29634, USA
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Alemayehu GM, Cherie KT, Chernet AG. Severity of malnutrition among underweight children and family-related factors: A cross-sectional analysis of data from the 2019 Ethiopian Demographic and Health Survey (EDHS). Health Sci Rep 2022; 5:e860. [PMID: 36210870 PMCID: PMC9528949 DOI: 10.1002/hsr2.860] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 09/01/2022] [Accepted: 09/04/2022] [Indexed: 11/06/2022] Open
Abstract
Background and Aims Malnutrition is one of the key factors in children's inappropriate physical and mental development. It is a significant issue that results in the deaths of 3.5 million children under the age of 5 every year worldwide. This study's primary goal was to pinpoint important family‐related causes of underweight child malnutrition in Ethiopia. Methods The data were gathered from the Central Statistical Agency's 2019 Ethiopian Demographic and Health Survey. Data were examined using descriptive statistics and an ordinal logistic regression model after the sample was chosen using a stratified, two‐stage cluster sampling approach. Results Overall 6101 underweight children were involved in the study of which 5019 (82.27%) were severely underweight, 28 (0.46%) were moderately underweight and 1054 (17.28%) were mild. The result showed that, birth order (p < 0.001), partners education, (p < 0.001), partner occupation (p < 0.001) and type of place of residence (p < 0.001) were associated with child malnutrition and also child from poorest family (p = 0.01, adjusted odds ratio [AOR]: 0.745, CI: −0.534, −0.056), children from workless partner (p = 0.169 AOR:CI: 1.855, −0.262, 1.498), and female children (p < 0.001, AOR: 0.793, CI: −0.369, −0.093) were severely malnourished. Conclusions wealth index combined, sex, and region have statistically significant effect on Severity of malnutrition. Female children were highly malnourished. Children in Amhara, Afar, and Tigray region were highly affected by severe malnutrition relative to other regions. Hence, the government is recommended to impose action on child nutrition in the area as it is a public health issue.
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Affiliation(s)
- Gedif M. Alemayehu
- Statistics Department, College of Natural and Computational ScienceInijibara UniversityInjibaraEthiopia
| | - Kebadu T. Cherie
- Statistics Department, College of Natural and Computational SciencesDebre Markos UniversityDebre MarkosEthiopia
| | - Ayele G. Chernet
- Statistics Department, College of Natural and Computational SciencesWolkite UniversityWolkiteEthiopia
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Sasaki D, Suppasri A, Tsukuda H, Nguyen DN, Onoda Y, Imamura F. People's Perception of Well-Being during the COVID-19 Pandemic: A Case Study in Japan. Int J Environ Res Public Health 2022; 19:12146. [PMID: 36231446 PMCID: PMC9565944 DOI: 10.3390/ijerph191912146] [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] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Revised: 09/08/2022] [Accepted: 09/17/2022] [Indexed: 06/16/2023]
Abstract
This study aims to examine people's perception of well-being during the COVID-19 pandemic in Japan and quantitatively clarify key factors towards realizing evidence-based policymaking. In March 2022, 400 participants responded to a survey conducted through Rakuten Insight. The authors applied an ordinal logistic regression (OLR), followed by principal component analysis (PCA), to create a new compound indicator (CI) to represent people's perception of well-being during the pandemic in addition to ordinary least squares (OLS) regression with a forward-backward stepwise selection method, where the dependent variable is the principal component score of the first principal component (PC1), while the independent variables are the same as the abovementioned OLR. Consequently, while analyzing OLR, some independent variables showed statistical significance, while the CI provided an option to grasp people's perception of well-being. Furthermore, family structure was statistically significant in all cases of OLR and OLS. Moreover, in terms of the standardized coefficients (beta) of OLS, the family structure had the greatest impact on the CI. Based on the study results, the authors advocate that the Japanese government should pay more attention to single-person households affected by the COVID-19 pandemic.
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Affiliation(s)
- Daisuke Sasaki
- International Research Institute of Disaster Science (IRIDeS), Tohoku University, Sendai 980-8572, Japan
| | - Anawat Suppasri
- International Research Institute of Disaster Science (IRIDeS), Tohoku University, Sendai 980-8572, Japan
| | - Haruka Tsukuda
- Department of Architecture and Building Science, School of Engineering, Tohoku University, Sendai 980-8579, Japan
| | - David N. Nguyen
- International Research Institute of Disaster Science (IRIDeS), Tohoku University, Sendai 980-8572, Japan
| | - Yasuaki Onoda
- Department of Architecture and Building Science, School of Engineering, Tohoku University, Sendai 980-8579, Japan
| | - Fumihiko Imamura
- International Research Institute of Disaster Science (IRIDeS), Tohoku University, Sendai 980-8572, Japan
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Penton H, Dayson C, Hulme C, Young T. An Investigation of Age-Related Differential Item Functioning in the EQ-5D-5L Using Item Response Theory and Logistic Regression. Value Health 2022; 25:1566-1574. [PMID: 35487819 DOI: 10.1016/j.jval.2022.03.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 03/07/2022] [Accepted: 03/19/2022] [Indexed: 06/14/2023]
Abstract
OBJECTIVES In economic evaluations, quality of life is measured using patient-reported outcome measures (PROMs), such as the EQ-5D-5L. A key assumption for the validity of PROMs data is measurement invariance, which requires that PROM items and response options are interpreted the same across respondents. If measurement invariance is violated, PROMs exhibit differential item functioning (DIF), whereby individuals from different groups with the same underlying health respond differently, potentially biasing scores. One important group of healthcare consumers who have been shown to have different views or priorities over health is older adults. This study investigates age-related DIF in the EQ-5D-5L using item response theory (IRT) and ordinal logistic regression approaches. METHODS Multiple-group IRT models were used to investigate DIF, by assessing whether older adults aged 65+ years and younger adults aged 18 to 64 years with the same underlying health had different IRT parameter estimates and expected item and EQ-5D-5L level sum scores. Ordinal logistic regression was also used to examine whether DIF resulted in meaningful differences in expected EQ level sum scores. Effect sizes examined whether DIF indicated meaningful score differences. RESULTS The anxiety/depression item exhibited meaningful DIF in both approaches, with older adults less likely to report problems. Pain/discomfort and mobility exhibited DIF to a lesser extent. CONCLUSIONS When using the EQ-5D-5L to evaluate interventions and make resource allocation decisions, scoring bias due to DIF should be controlled for to prevent inefficient service provision, where the most cost-effective services are not provided, which could be detrimental to patients and the efficiency of health budgets.
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Affiliation(s)
- Hannah Penton
- School of Health and Related Research, University of Sheffield, Sheffield, England, UK.
| | - Christopher Dayson
- Centre for Regional Economic and Social Research, Sheffield Hallam University, Sheffield, England, UK
| | - Claire Hulme
- Institute of Health Research, University of Exeter, St Luke's Campus, Exeter, England, UK
| | - Tracey Young
- School of Health and Related Research, University of Sheffield, Sheffield, England, UK
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Ranjbarnia B, Kamelifar MJ, Masoumi H. The Association between Active Mobility and Subjective Wellbeing during COVID-19 in MENA Countries. Healthcare (Basel) 2022; 10. [PMID: 36141215 DOI: 10.3390/healthcare10091603] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 08/19/2022] [Accepted: 08/19/2022] [Indexed: 11/16/2022] Open
Abstract
Objective: To augment the international scientific approach to raising public mental health through active lifestyle among adults, we added the evidence of the association between physical activity and subjective wellbeing in the Middle East and North Africa region by emphasizing the mediator—COVID-19. This study aimed to identify the correlations between active mobility and subjective wellbeing during the COVID-19 pandemic in a sample from Tabriz, Iran, which has not yet been tackled in previous study. Methods: We finalized an online survey (N = 603) from adults between 5 June and 15 July 2021. This group reported their individual and socio-economic characteristics and their perception features and location (e.g., home, work) during COVID-19. The paper developed three ordinal logistic regression (OLR) models to examine the association between active mobility types such as commute, non-commute, frequency of active travel to parks and services per week, and different subjective wellbeing including: 1- life satisfaction, 2- feeling energetic, and 3- peaceful mind while controlling for socio-economic variables (e.g., age, gender, education, job, and income) and objective commute distance. We also incorporated the most relevant objective (street length, land-use mix, number of intersections, and building and population density) and subjective (perceived distance to different services, perceived walking places, and perceived facilities attractiveness) factors. Results: Positive response relationships between four types of physical activity levels and subjective wellbeing scores were demonstrated in all of the three developed models (with significant levels of 0.05, and 0.1) with appropriate model fits, which confirmed the existing literature. However, these relationships showed different patterns (varied significant levels) for each type of subjective wellbeing. In addition, the factors including street length (p value: 0.004), perceived walkable places (p value: 0.021, 0.068, 0.017, and 0.025) (positively), population density, and perceived distance to shopping malls (p value: 0.076, <0.0001, and 0.059 (negatively) were associated with different indicators of subjective wellbeing. Conclusion: As for the implication of our study, special actions by urban authorities such as increasing mixed-use and creating attractive places will be required to enhance the walkability of the neighborhoods. Moreover, notifying the adults regarding the benefits of physical activity is much more needed.
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Park JH, Choi JY, Lee J, Kyung M. Bayesian Approach to Multivariate Component-Based Logistic Regression: Analyzing Correlated Multivariate Ordinal Data. Multivariate Behav Res 2022; 57:543-560. [PMID: 33523709 DOI: 10.1080/00273171.2021.1874260] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Applications of component-based models have gained much attention as a means of accompanying dimension reduction in the regression setting and have been successfully implemented to model a univariate outcome in the behavioral and social sciences. Despite the prevalence of correlated ordinal outcome data in the fields, however, most of the extant component-based models have been extended to address the multivariate ordinal issue with a simplified but unrealistic assumption of independence, which may lead to biased statistical inferences. Thus, we propose a Bayesian methodology for a component-based model that accounts for unstructured residual covariances, while regressing multivariate ordinal outcomes on pre-defined sets of predictors. The proposed Bayesian multivariate ordinal logistic model re-expresses ordinal outcomes of interest with a set of latent continuous variables based on an approximate multivariate t-distribution. This contributes not only to developing an efficient Gibbs sampler, a Markov Chain Monte Carlo algorithm, but also to facilitating the interpretation of regression coefficients as log-transformed odds ratio. The empirical utility of the proposed method is demonstrated through analyzing a subset of data, extracted from the 2009 to 2010 Health Behavior in School-Aged Children study that investigates risk factors of four different forms of bullying perpetration and victimization: physical, social, racial, and cyber.
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Affiliation(s)
| | | | - Jungup Lee
- Department of Social Work, National University of Singapore
| | - Minjung Kyung
- Department of Statistics, Duksung Women's University
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13
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Abstract
Torsades de pointes (TdP) is an irregular heart rhythm characterized by faster beat rates and potentially could lead to sudden cardiac death. Much effort has been invested in understanding the drug-induced TdP in preclinical studies. However, a comprehensive statistical learning framework that can accurately predict the drug-induced TdP risk from preclinical data is still lacking. We proposed ordinal logistic regression and ordinal random forest models to predict low-, intermediate-, and high-risk drugs based on datasets generated from two experimental protocols. Leave-one-drug-out cross-validation, stratified bootstrap, and permutation predictor importance were applied to estimate and interpret the model performance under uncertainty. The potential outlier drugs identified by our models are consistent with their descriptions in the literature. Our method is accurate, interpretable, and thus useable as supplemental evidence in the drug safety assessment.
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Affiliation(s)
- Nan Miles Xi
- Department of Mathematics and Statistics, Loyola University Chicago, Chicago, Illinois, USA
| | - Yu-Yi Hsu
- Office of Biostatistics, Office of Translational Science, Center for Drug Evaluation and Research, US Food and Drug Administration, Silver Spring, Maryland, USA
| | - Qianyu Dang
- Office of Biostatistics, Office of Translational Science, Center for Drug Evaluation and Research, US Food and Drug Administration, Silver Spring, Maryland, USA
| | - Dalong Patrick Huang
- Office of Biostatistics, Office of Translational Science, Center for Drug Evaluation and Research, US Food and Drug Administration, Silver Spring, Maryland, USA
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Oumer A, Abraham M, Nuri A. Predictors of Major Dietary Patterns Among Pregnant Women Attending Public Health Facilities in Eastern Ethiopia: A New Epidemiological Approach. Front Nutr 2022; 9:855149. [PMID: 35548559 PMCID: PMC9085216 DOI: 10.3389/fnut.2022.855149] [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] [Received: 02/04/2022] [Accepted: 03/10/2022] [Indexed: 11/23/2022] Open
Abstract
Background Dietary pattern analysis is a robust statistical procedure that efficiently characterize the dietary intakes of individuals. However, there is a lack of robust dietary intake evidence beyond nutrient intake in Ethiopia. This study was to answer, what are the major dietary consumption patterns and its predictors among pregnant women in Ethiopia. Methods A facility-based survey among 380 randomly selected pregnant women using a contextualized food frequency questionnaire (FFQ) over 1 month recall was used. The frequency of food consumption was standardized to daily frequency equivalents, and a sequential exploratory factor analysis was used to derive major dietary patterns. A multivariable ordinary logistic regression model was fitted with all its assumptions. Results Three major dietary patterns (“fruits and animal-source foods,” “cereals, tubers, and sweet foods,” “legumes and vegetables”), explaining 65% of the total variation were identified. Women snacks (AOR = 1.93; 1.23–2.75), without food aversion (AOR = 1.59; 1.08–2.35), non-fasting (AOR = 0.75; 1.12–2.12), and receiving nutritional counseling (AOR = 1.96; 1.25–3.07) were significantly positively associated with a higher tercile of fruits and animal-source food consumption. Non-working mothers (AOR = 1.8;1.23–2.76), chronic disease (AOR = 1.88; 1.14–3.09), or received nutritional counseling (AOR = 1.33; 0.88–2.01), were fasting (AOR = 1.33;0.88–2.01), and no food cravings (AOR = 4.27;2.67–6.84), and aversion (AOR = 1.60;1.04–2.44) had significantly higher odds of consuming cereals, tubers, and sweet foods. Literacy (AOR = 1.87; 1.14–3.09), urban residence (AOR = 2.10; 1.10–3.93), low socioeconomic class (AOR = 2.68; 1.30–5.23), and skipping meals (AOR = 1.73; 1.15–2.62) were associated with higher odds of legume and vegetable consumption. Conclusion Socioeconomic class, literacy, occupation, getting nutritional counseling, habits of food craving, food aversion, and fasting can predict a woman’s dietary pattern.
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Affiliation(s)
- Abdu Oumer
- Department of Public Health, College of Medicine and Health Sciences, Dire Dawa University, Dire Dawa, Ethiopia
| | - Mihret Abraham
- Department of Public Health, College of Medicine and Health Sciences, Dire Dawa University, Dire Dawa, Ethiopia
| | - Aliya Nuri
- Department of Public Health, College of Medicine and Health Sciences, Dire Dawa University, Dire Dawa, Ethiopia
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15
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Alvandi A, Hatefi A. Estimation of ordinal population with multi-observer ranked set samples using ties information. Stat Methods Med Res 2021; 30:1960-1975. [PMID: 34218747 DOI: 10.1177/09622802211025989] [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] [Indexed: 11/17/2022]
Abstract
In many surveys, we often deal with situations where measuring the study variable is expensive; however, there are easy-to-measure characteristics which can be used as ranking information to obtain more representative samples from the population. Ranked set sampling is successfully employed in these cases as an alternative to commonly used simple random sampling. When the data is ordinal categorical, it is common to apply the ordinal logistic regression approach to ranked set sampling data for the estimation of parameters. This technique first depends on the information of training data. Besides, one is not capable of using the ranking information in the estimation process. In this paper, we propose a ranked set sampling scheme in which ranking information from multiple sources can be combined and incorporated efficiently into both data collection and estimation. The ranked set sampling data is used for non-parametric and maximum likelihood estimation of ordinal categorical population. Through extensive simulation studies, the performance of estimators is evaluated. The methods are finally applied to analyze bone disorder data and obesity data.
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Affiliation(s)
- Amirhossein Alvandi
- Department of Mathematics and Statistics, University of Massachusetts, Amherst, MA, USA
| | - Armin Hatefi
- Department of Mathematics and Statistics, 7512Memorial University of Newfoundland, Memorial University of Newfoundland, St John's, NL, Canada
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16
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Cheng J, Wang H, Zhang X, Guo H, Duan H. The factors of family management affecting asthma control status in school-age children with asthma in China. J Asthma 2021; 59:1041-1050. [PMID: 33629923 DOI: 10.1080/02770903.2021.1895209] [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: 10/22/2022]
Abstract
OBJECTIVE To identify the factors of family management affecting asthma control status in school-age children with asthma in China. METHOD The cross-sectional descriptive study was conducted among 139 children with asthma and their parents. The age range of the children was 7 to 14 years of age (Mage = 9.85; 76.26% boys). Eight dimensions (Children Identity, View of Condition, Management Mindset, Parental Mutuality, Parenting Philosophy, Management Approach, Family Focus, Future Expectation) of the Family Management Scale for Children with Asthma (FMSCA) were used as factors of family management. The Asthma Control Test (ACT) and the Children Asthma Control Test (C-ACT) were used to measure the asthma control status of children. A parental questionnaire was used to collect information regarding demographic data of familial socioeconomic status, general data about the child, and medical services status (Follow-Up Plan, received manual of asthma education, attended a lecture on asthma) received from medical institutions. A multivariate ordinal logistic regression model was performed. RESULTS Factors significantly associated with asthma control were "Follow-Up Plan" (OR, 2.004; 95% CI, 1.009-3.981), "Attended a Lecture on asthma" (OR, 2.586; 95% CI, 1.103-6.066) and two dimensions of the FMSCA, "Children Identity" (OR = 1.133; 95% CI, 1.024-1.254) and "Family Focus" (OR = 1.114; 95% CI, 1.007-1.232). CONCLUSION This study shows that asthma control status of school-age children in China is related to the parents' views of their child as having a "normal condition" and the parents' satisfaction with the balance between asthma related management and other aspects of family life.
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Affiliation(s)
- Juan Cheng
- School of Nursing, Beijing University of Chinese Medicine, Beijing, China
| | - Huifeng Wang
- School of Nursing, Beijing University of Chinese Medicine, Beijing, China
| | - Xianzhen Zhang
- Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Hailing Guo
- Nursing Department, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Hongmei Duan
- School of Nursing, Beijing University of Chinese Medicine, Beijing, China
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Ghanchi A, Rahshenas M, Bonnet D, Derridj N, LeLong N, Salomon LJ, Goffinet F, Khoshnood B. Prevalence of Growth Restriction at Birth for Newborns With Congenital Heart Defects: A Population-Based Prospective Cohort Study EPICARD. Front Pediatr 2021; 9:676994. [PMID: 34123973 PMCID: PMC8192794 DOI: 10.3389/fped.2021.676994] [Citation(s) in RCA: 5] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Accepted: 04/30/2021] [Indexed: 11/13/2022] Open
Abstract
Background and Objectives: Congenital heart defects (CHD) and growth restriction at birth are two major causes of childhood and adult morbidity and mortality. The aim of this study was to assess the overall risk of growth restriction at birth, as measured by its imperfect proxy small (< 10th percentile) for gestational age (SGA), for newborns with CHD. Methods: Using data from a population-based cohort of children born with CHD, we assessed the risk of growth restriction at birth using SGA and severe SGA (3rd percentile). To compare the odds of SGA and severe SGA across five specific major CHD, we used ordinal logistic regression using isolated, minor (non-operated) ventricular septal defect (VSD) as the control group. Results: The overall proportion of SGA for "isolated" CHD (i.e., those not associated with other anomalies) was 13% (95% CI, 12-15%), which is 30% higher than what would be expected in the general population (i.e., 10%). The risk of severe SGA was 5% (95% CI, 4-6%) as compared with the expected 3% in the general population. There were substantial differences in the risk of overall SGA and more so severe SGA across the different CHD. The highest risk of SGA occurred for Tetralogy of Fallot (adjusted OR 2.7, 95% CI, 1.3-5.8) and operated VSD (adjusted OR 2.1, 95% CI, 1.1-3.8) as compared with the control group of minor (non-operated) VSD. Conclusion: The overall risks of both SGA and severe SGA were higher in isolated CHD than what would be expected in the general population with substantial differences across the subtypes of CHD. These results may provide a clue for understanding the underlying mechanisms of the relation between alterations in fetal circulation associated with different types of CHD and their effects on fetal growth.
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Affiliation(s)
- Ali Ghanchi
- Université de Paris, CRESS, INSERM, INRA, Paris, France.,Service d'Obstétrique - Maternité, Chirurgie Médecine et Imagerie Fœtales. APHP. Hôpital Necker Enfants Malades, Paris, France
| | | | - Damien Bonnet
- Department of Pediatric Cardiology, M3C-Necker. APHP. Hôpital Necker-Enfants Malades, Paris, France.,University of Paris, Paris, France
| | - Neil Derridj
- Université de Paris, CRESS, INSERM, INRA, Paris, France.,Department of Pediatric Cardiology, M3C-Necker. APHP. Hôpital Necker-Enfants Malades, Paris, France
| | | | - Laurent J Salomon
- Service d'Obstétrique - Maternité, Chirurgie Médecine et Imagerie Fœtales. APHP. Hôpital Necker Enfants Malades, Paris, France.,University of Paris, Paris, France
| | - Francois Goffinet
- Université de Paris, CRESS, INSERM, INRA, Paris, France.,Port-Royal Maternity Unit, Cochin Hospital, APHP, Paris, France
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Gebrehaweria Gebremeskel M, Lemma Tirore L. Factors Associated with Anemia Among Children 6-23 Months of Age in Ethiopia: A Multilevel Analysis of Data from the 2016 Ethiopia Demographic and Health Survey. Pediatric Health Med Ther 2020; 11:347-357. [PMID: 32982542 PMCID: PMC7508559 DOI: 10.2147/phmt.s258114] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 05/20/2020] [Accepted: 08/21/2020] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Anemia is disproportionately borne among children in the African regions including Ethiopia. In Ethiopia, there is limited information on the prevalence and factors associated with anemia among children aged 6-23 months. Therefore, the aim of this study was to identify individual- and community-level factors associated with anemia among children 6-23 months of age. METHODS The data were obtained from the 2016 Ethiopia Demographic and Health Survey, conducted from January to June 2016. A sample of 2554 children aged 6-23 months was included. Data were analyzed using STATA version 14. A multilevel ordinal logistic regression model was fitted and an adjusted odds ratio with a 95% confidence interval was obtained. RESULTS The prevalence of anemia among children 6-23 months of age was 72.3%; 27.5% mild, 41% moderate, and 3.8% severe anemia. child age 18-23 months (AOR: 0.76; 95%CI: 0.61-0.93), female sex (AOR: 0.84; 95%CI: 0.72-0.98), maternal anemia (AOR: 1.53; 95%CI: 1.28-1.82), exclusive breastfeeding (AOR: 0.73; 95%CI: 0.54-0.98), child fever (AOR: 1.41; 95%CI: 1.03-1.93), underweight children (AOR: 1.42; 95%CI: 1.17-1.73) and exposure to either newspaper, radio or television (AOR: 0.78; 95%CI: 0.61-0.99) were the individual-level factors associated with anemia. High community-poverty (AOR: 1.30; 95%CI: 1.01-1.67), living in the regions of Somali (AOR: 2.08; 95%CI: 1.31-3.29), Amhara (AOR: 0.65; 95%CI: 0.45-0.94), Benishangul (AOR: 0.39; 95%CI: 0.25- 0.61) and Harari (AOR: 1.97; 95%CI: 1.18-3.31) were the community-level factors associated with anemia. CONCLUSION This study showed that childhood anemia is affected both by the individual- and community-level factors. The strategies of promoting exclusive breastfeeding, addressing maternal anemia, child fever, giving special attention for underweight children, and targeting regions identified to have a high risk of anemia should be strengthened to reduce childhood anemia.
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Affiliation(s)
| | - Lire Lemma Tirore
- Department of Public Health, College of Medicine and Health Sciences, Wachemo University, Hossana, Southern Nations Nationalities and peoples, Ethiopia
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Akbar M, Niaz R, Amjad M. Determinants of households' food insecurity with severity dimensions in Pakistan: Varying estimates using partial proportional odds model. Health Soc Care Community 2020; 28:1698-1709. [PMID: 32301160 DOI: 10.1111/hsc.12995] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 01/31/2020] [Accepted: 03/19/2020] [Indexed: 06/11/2023]
Abstract
This study is conducted to determine the impact of some selected socioeconomic and demographic factors on households' food insecurity in Pakistan. Data are taken from national-level survey Household Integrated Income and Consumption Survey 2015-2016. Inclusion of gender dimensions of some important factors and estimation of varying estimates at four severity levels of households' food insecurity status using partial proportional odds model may be considered unique features of the study. It is concluded that household's income, employment, agricultural income, donations, parental education level and some households' characteristics are important factors for improving food security in Pakistan. Maternal education, and maternal paid employment compared to paternal education, and paternal paid employment show strong positive effects to improve severe food insecurity. Couple paid employment, livestock ownership and operating agricultural land seem to have the most effective role for improving food security. Social welfare programmes and religious institution of Zakat are helpful to cope with severe food insecurity in Pakistan. Some special efforts or development strategies are recommended to improve food insecurity of rural households and Baluchistan province. Moreover, the observed U-type quadratic impact of household size and the adverse impact of dependency ratio induce effective policies to control high birth rate in Pakistan. Hence, creation of employment opportunities especially for women, appreciation of couple paid employment, easy access to education for women, steps to raise level of education, growth of agricultural sector, rural development, social welfare and development schemes for Baluchistan, and continuation of Benazir Income Support Program are recommended to overcome severe and moderate level food insecurity in Pakistan. Since socioeconomic conditions and food insecurity issues of developing countries and especially in South Asian countries are homogeneous and therefore, the analysis in this study might be relevant to South Asian region.
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Affiliation(s)
- Muhammad Akbar
- Department of Mathematics and Statistics, International Islamic University Islamabad, Islamabad, Pakistan
| | - Rizwan Niaz
- Department of Mathematics and Statistics, International Islamic University Islamabad, Islamabad, Pakistan
| | - Muhammad Amjad
- Department of Mathematics and Statistics, International Islamic University Islamabad, Islamabad, Pakistan
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20
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Xu K, Zhou M, Yang D, Ling Y, Liu K, Bai T, Cheng Z, Li J. Application of ordinal logistic regression analysis to identify the determinants of illness severity of COVID-19 in China. Epidemiol Infect. 2020;148:e146. [PMID: 32631458 PMCID: PMC7369341 DOI: 10.1017/s0950268820001533] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Corona Virus Disease 2019 (COVID-19) has presented an unprecedented challenge to the health-care system across the world. The current study aims to identify the determinants of illness severity of COVID-19 based on ordinal responses. A retrospective cohort of COVID-19 patients from four hospitals in three provinces in China was established, and 598 patients were included from 1 January to 8 March 2020, and divided into moderate, severe and critical illness group. Relative variables were retrieved from electronic medical records. The univariate and multivariate ordinal logistic regression models were fitted to identify the independent predictors of illness severity. The cohort included 400 (66.89%) moderate cases, 85 (14.21%) severe and 113 (18.90%) critical cases, of whom 79 died during hospitalisation as of 28 April. Patients in the age group of 70+ years (OR = 3.419, 95% CI: 1.596-7.323), age of 40-69 years (OR = 1.586, 95% CI: 0.824-3.053), hypertension (OR = 3.372, 95% CI: 2.185-5.202), ALT >50 μ/l (OR = 3.304, 95% CI: 2.107-5.180), cTnI >0.04 ng/ml (OR = 7.464, 95% CI: 4.292-12.980), myohaemoglobin>48.8 ng/ml (OR = 2.214, 95% CI: 1.42-3.453) had greater risk of developing worse severity of illness. The interval between illness onset and diagnosis (OR = 1.056, 95% CI: 1.012-1.101) and interval between illness onset and admission (OR = 1.048, 95% CI: 1.009-1.087) were independent significant predictors of illness severity. Patients of critical illness suffered from inferior survival, as compared with patients in the severe group (HR = 14.309, 95% CI: 5.585-36.659) and in the moderate group (HR = 41.021, 95% CI: 17.588-95.678). Our findings highlight that the identified determinants may help to predict the risk of developing more severe illness among COVID-19 patients and contribute to optimising arrangement of health resources.
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Alem K, Gebeyehu S, Arega Y. Risk Factors and Treatment Types for Asthma Severity Among Adult Patients. J Asthma Allergy 2020; 13:167-177. [PMID: 32440162 PMCID: PMC7217635 DOI: 10.2147/jaa.s246464] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 01/17/2020] [Accepted: 04/23/2020] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVE The aim of this study was to identify the risk factors and treatment types for asthma severity among adult patients by applying a retrospective study design. MATERIALS AND METHODS The symptoms of asthma and corresponding medication prescription were addressed by descriptive statistics, and an ordinal logistic regression model was applied to identify the risk factors of asthma severity based on the data obtained from chronic follow-up of 422 adult asthma patients from September 11, 2012, to July 8, 2016, at the University of Gondar Teaching Hospital (UOGTH). RESULTS From 422 study units, the more commonly presenting asthma symptoms were coughing and wheezing expressed by 52.13% and 50.9%, respectively. For the treatment type given to the patients, oxygen and prednisolone were highly distributed drugs to the patients in chronic illness, medication and follow-up clinic of the University of Gondar Teaching Hospital (UOGTH) which were expressed by 73.5% and 35.5%, respectively. The proportional odd logit model was used to analyse asthma severity in patients; patients who were female (OR=1.68), a rural resident (OR=1.56), regular physical exercise (OR=2.39), allergen to pet (OR=3.17), had asthma in childhood (OR=2.27), had a family history (OR=1.89), and had depression (OR=2.31) were more likely to increase asthma severity than others, and patients who were in case with regular cooker, dry season was less likely to increase asthma severity. CONCLUSION Generally, the study presented the most common asthma symptoms and treatment types correspondingly. The study also showed that demographic, environmental, genetic, and health-related factors have a significant effect on asthma severity.
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Affiliation(s)
- Kidanemariam Alem
- Department of Biostatistics, School of Public Health, College of Health Sciences, Mekelle University, Mekelle, Ethiopia
| | - Sefinew Gebeyehu
- Department of Statistics, College of Natural and Computational Sciences, Adigrat University, Adigrat, Ethiopia
| | - Yibeltal Arega
- Department of Statistics, College of Natural and Computational Sciences, University of Gondar, Gondar, Ethiopia
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Satake E, Majima K, Aoki SC, Kamitani Y. Sparse Ordinal Logistic Regression and Its Application to Brain Decoding. Front Neuroinform 2018; 12:51. [PMID: 30158864 PMCID: PMC6104194 DOI: 10.3389/fninf.2018.00051] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [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: 12/22/2017] [Accepted: 07/24/2018] [Indexed: 11/13/2022] Open
Abstract
Brain decoding with multivariate classification and regression has provided a powerful framework for characterizing information encoded in population neural activity. Classification and regression models are respectively used to predict discrete and continuous variables of interest. However, cognitive and behavioral parameters that we wish to decode are often ordinal variables whose values are discrete but ordered, such as subjective ratings. To date, there is no established method of predicting ordinal variables in brain decoding. In this study, we present a new algorithm, sparse ordinal logistic regression (SOLR), that combines ordinal logistic regression with Bayesian sparse weight estimation. We found that, in both simulation and analyses using real functional magnetic resonance imaging (fMRI) data, SOLR outperformed ordinal logistic regression with non-sparse regularization, indicating that sparseness leads to better decoding performance. SOLR also outperformed classification and linear regression models with the same type of sparseness, indicating the advantage of the modeling tailored to ordinal outputs. Our results suggest that SOLR provides a principled and effective method of decoding ordinal variables.
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Affiliation(s)
- Emi Satake
- Graduate School of Informatics, Kyoto University, Kyoto, Japan
| | - Kei Majima
- Graduate School of Informatics, Kyoto University, Kyoto, Japan
| | | | - Yukiyasu Kamitani
- Graduate School of Informatics, Kyoto University, Kyoto, Japan.,ATR Computational Neuroscience Laboratories, Kyoto, Japan
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Kumwenda B, Cleland JA, Prescott GJ, Walker K, Johnston PW. Relationship between sociodemographic factors and selection into UK postgraduate medical training programmes: a national cohort study. BMJ Open 2018; 8:e021329. [PMID: 29961026 PMCID: PMC6042613 DOI: 10.1136/bmjopen-2017-021329] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
INTRODUCTION Knowledge about allocation of doctors into postgraduate training programmes is essential in terms of workforce planning, transparency and equity issues. However, this is a rarely examined topic. To address this gap in the literature, the current study examines the relationships between applicants' sociodemographic characteristics and outcomes on the UK Foundation Training selection process. METHODS A longitudinal, cohort study of trainees who applied for the first stage of UK postgraduate medical training in 2013-2014. We used UK Medical Education Database (UKMED) to access linked data from different sources, including medical school admissions, assessments and postgraduate training. Multivariable ordinal regression analyses were used to predict the odds of applicants being allocated to their preferred foundation schools. RESULTS Applicants allocated to their first-choice foundation school scored on average a quarter of an SD above the average of all applicants in the sample. After adjusting for Foundation Training application score, no statistically significant effects were observed for gender, socioeconomic status (as determined by income support) or whether applicants entered medical school as graduates or not. Ethnicity and place of medical qualification were strong predictors of allocation to preferred foundation school. Applicants who graduated from medical schools in Wales, Scotland and Northern Ireland were 1.17 times, 3.33 times and 12.64 times (respectively), the odds of applicants who graduated from a medical school in England to be allocated to a foundation school of their choice. CONCLUSIONS The data provide supportive evidence for the fairness of the allocation process but highlight some interesting findings relating to 'push-pull' factors in medical careers decision-making. These findings should be considered when designing postgraduate training policy.
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Affiliation(s)
- Ben Kumwenda
- Centre for Healthcare Education Research and Innovation (CHERI), School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Aberdeen, UK
| | - Jennifer A Cleland
- Centre for Healthcare Education Research and Innovation (CHERI), School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Aberdeen, UK
| | - Gordon J Prescott
- Medical Statistics Team, School of Medicine, Medical Sciences & Nutrition, University of Aberdeen, Aberdeen, UK
| | - Kim Walker
- NHS Grampian, NHS Education for Scotland and UK Foundation Programme, Aberdeen, UK
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Ren AN, Neher RE, Bell T, Grimm J. Using Patient Demographics and Statistical Modeling to Predict Knee Tibia Component Sizing in Total Knee Arthroplasty. J Arthroplasty 2018; 33:1732-1736. [PMID: 29502967 DOI: 10.1016/j.arth.2018.01.031] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 01/11/2018] [Accepted: 01/22/2018] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND Preoperative planning is important to achieve successful implantation in primary total knee arthroplasty (TKA). However, traditional TKA templating techniques are not accurate enough to predict the component size to a very close range. METHODS With the goal of developing a general predictive statistical model using patient demographic information, ordinal logistic regression was applied to build a proportional odds model to predict the tibia component size. The study retrospectively collected the data of 1992 primary Persona Knee System TKA procedures. Of them, 199 procedures were randomly selected as testing data and the rest of the data were randomly partitioned between model training data and model evaluation data with a ratio of 7:3. Different models were trained and evaluated on the training and validation data sets after data exploration. RESULTS The final model had patient gender, age, weight, and height as independent variables and predicted the tibia size within 1 size difference 96% of the time on the validation data, 94% of the time on the testing data, and 92% on a prospective cadaver data set. CONCLUSION The study results indicated the statistical model built by ordinal logistic regression can increase the accuracy of tibia sizing information for Persona Knee preoperative templating. This research shows statistical modeling may be used with radiographs to dramatically enhance the templating accuracy, efficiency, and quality. In general, this methodology can be applied to other TKA products when the data are applicable.
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Affiliation(s)
- Anna N Ren
- Biostatistics and Data Management Group, Department of Clinical Affairs, Zimmer Biomet Inc, Warsaw, IN
| | - Robert E Neher
- Biostatistics and Data Management Group, Department of Clinical Affairs, Zimmer Biomet Inc, Warsaw, IN
| | - Tyler Bell
- Transformative Technology Team, Department of the Knee Product Segment, Zimmer Biomet Inc, Warsaw, IN
| | - James Grimm
- Transformative Technology Team, Department of the Knee Product Segment, Zimmer Biomet Inc, Warsaw, IN
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Fresnedo-Ramírez J, Famula TR, Gradziel TM. Application of a Bayesian ordinal animal model for the estimation of breeding values for the resistance to Monilinia fruticola (G.Winter) Honey in progenies of peach [ Prunus persica (L.) Batsch]. Breed Sci 2017; 67:110-122. [PMID: 28588387 PMCID: PMC5445959 DOI: 10.1270/jsbbs.16027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Accepted: 11/07/2016] [Indexed: 06/01/2023]
Abstract
Fruit brown rot caused by Monilinia spp. is the most important fungal disease of stone fruits worldwide. Several phenotyping protocols to accurately characterize and evaluate brown rot infection have been proposed; however, the outcomes from those studies have not led to consistent advances in resistance breeding programs. Breeding for disease resistance is one of the most challenging objectives for crop improvement because disease expression is tetrahedral: it is simultaneously influenced by agent, host, environment, and human management. The present study presents a strategy based on Bayesian inference to analyze a peach breeding progeny for resistance to brown rot, evaluated using a polytomous ordinal scale. A pedigree containing two sources of resistance, one from peach and the other from almond, several commercial cultivars, and two segregating populations were analyzed to estimate the narrow-sense heritability (h2 ) and breeding values (EBVs) for brown rot resistance in progenies. Results show promise for genetic improvement of disease resistance and other traits characterized by strong environmental interactions.
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Affiliation(s)
| | - Thomas R. Famula
- Department of Animal Science, University of California,
1 Shields Avenue, Davis, CA 95616,
USA
| | - Thomas M. Gradziel
- Department of Plant Sciences, University of California,
1 Shields Avenue, Davis, CA 95616,
USA
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Skropanic D, Fufaa G, Cai B. The Association Between Changes in Insulin Sensitivity and Consumption of Tobacco and Alcohol in Young Adults: Ordinal Logistic Regression Approach. Cureus 2016; 8:e942. [PMID: 28123923 PMCID: PMC5262434 DOI: 10.7759/cureus.942] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
CONTEXT Reduced insulin sensitivity is one of the traditional risk factors for chronic diseases such as type 2 diabetes. Reduced insulin sensitivity leads to insulin resistance, which in turn can lead to the development of type 2 diabetes. Few studies have examined factors such as blood pressure, tobacco and alcohol consumption that influence changes in insulin sensitivity over time especially among young adults. PURPOSE To examine temporal changes in insulin sensitivity in young adults (18-30 years of age at baseline) over a period of 20 years by taking into account the effects of tobacco and alcohol consumptions at baseline. In other words, the purpose of the present study is to examine if baseline tobacco and alcohol consumptions can be used in predicting lowered insulin sensitivity. METHOD This is a retrospective study using data collected by the Coronary Artery Risk Development in Young Adults (CARDIA) study from the National Heart, Lung, and Blood Institute. Participants were enrolled into the study in 1985 (baseline) and followed up to 2005. Insulin sensitivity, measured by the quantitative insulin sensitivity check index (QUICKI), was recorded at baseline and 20 years later, in 2005. The number of participants included in the study was 3,547. The original study included a total of 5,112 participants at baseline. Of these, 54.48% were female, and 45.52% were male; 45.31% were 18 to 24 years of age, and 54.69% were 25 to 30 years of age. Ordinal logistic regression was used to assess changes in insulin sensitivity. Changes in insulin sensitivity from baseline were calculated and grouped into three categories (more than 15%, more than 8.5% to at most 15%, and at most 8.5%), which provided the basis for employing ordinal logistic regression to assess changes in insulin sensitivity. The effects of alcohol and smoking consumption at baseline on the change in insulin sensitivity were accounted for by including these variables in the model. RESULTS Daily alcohol consumption (ml/day) at baseline was not associated with changes in insulin sensitivity (OR = 0.998, 95% CI 0.995-1.001), while the number of cigarettes consumed per day at baseline was statistically significantly associated with changes in insulin sensitivity (OR = 1.016, 95% CI 1.007-1.025). Covariates such as age (OR = 1.05, 95% CI 1.031-1.071), mean arterial blood pressure (OR = 0.986, 95% CI 0.977-0.994), body-mass index (OR = 0.951, 95% CI 0.936-0.965), race (OR = 0.840, 95% CI 0.735-0.960), and sex (OR = 0.561, 95% CI 0.483-0.652) were significantly associated with changes in insulin sensitivity. CONCLUSION After adjusting for relevant covariates, the daily tobacco consumption at baseline was independently associated with changes in insulin sensitivity. But we were not able to replicate the association between daily alcohol consumption at baseline and changes in insulin resistance reported by other studies. Further studies in different populations and settings are warranted to examine the association between alcohol consumption and changes in insulin resistance.
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Affiliation(s)
- Dragan Skropanic
- Mathematics and Statistics Department, Western Wyoming Community College
| | | | - Bin Cai
- School of Health Sciences, Walden University
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Bhakta P, Ghosh BR, Singh U, Govind PS, Gupta A, Kapoor KS, Jain RK, Nag T, Mitra D, Ray M, Singh V, Mukherjee G. Incidence of postoperative nausea and vomiting following gynecological laparoscopy: A comparison of standard anesthetic technique and propofol infusion. ACTA ACUST UNITED AC 2016; 54:108-113. [PMID: 28024715 DOI: 10.1016/j.aat.2016.10.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [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: 03/06/2016] [Revised: 09/14/2016] [Accepted: 10/12/2016] [Indexed: 12/11/2022]
Abstract
OBJECTIVE To determine the safety, efficacy, and feasibility of propofol-based anesthesia in gynecological laparoscopies in reducing incidences of postoperative nausea and vomiting compared to a standard anesthesia using thiopentone/isoflurane. DESIGN Randomized single-blind (for anesthesia techniques used) and double-blind (for postoperative assessment) controlled trial. SETTING Operation theater, postanesthesia recovery room, teaching hospital. PATIENTS Sixty ASA (American Society of Anesthesiologists) I and II female patients (aged 20-60 years) scheduled for gynecological laparoscopy were included in the study. INTERVENTIONS Patients in Group A received standard anesthesia with thiopentone for induction and maintenance with isoflurane-fentanyl, and those in Group B received propofol for induction and maintenance along with fentanyl. All patients received nitrous oxide, vecuronium, and neostigmine/glycopyrrolate. No patient received elective preemptive antiemetic, but patients did receive it after more than one episode of vomiting. MEASUREMENTS Assessment for incidence of postoperative nausea and vomiting as well as other recovery parameters were carried out over a period of 24 hours. MAIN RESULTS Six patients (20%) in Group A and seven patients (23.3%) in Group B experienced nausea. Two patients (6.66%) in Group B had vomiting versus 12 (40%) in Group A (p<0.05). Overall, the incidence of emesis was 60% and 30% in Groups A and B, respectively (p<0.05). All patients in Group B had significantly faster recovery compared with those in Group A. No patient had any overt cardiorespiratory complications. CONCLUSION Propofol-based anesthesia was associated with significantly less postoperative vomiting and faster recovery compared to standard anesthesia in patients undergoing gynecological laparoscopy.
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Affiliation(s)
- Pradipta Bhakta
- Department of Anesthesiology and Intensive Care, University Hospital Kerry, Tralee, Ireland.
| | - Bablu Rani Ghosh
- Department of Anaesthesia and Intensive Care, Ramakrishna Mission Seva Pratishthan, Calcutta, India
| | - Umesh Singh
- Department of Internal Medicine, Division of Immunology/Allergy, University of Cincinnati, College of Medicine, Cincinnati, OH, USA
| | - Preeti S Govind
- Department of Anaesthesia and Pain Management, Indian Spinal Injuries Centre, New Delhi, India
| | - Abhinav Gupta
- Department of Anaesthesia and Pain Management, Indian Spinal Injuries Centre, New Delhi, India
| | - Kulwant Singh Kapoor
- Department of Biostatistics, All Indian Institute of Medical Sciences, New Delhi, India
| | - Rajesh Kumar Jain
- Department of Anaesthesia and Intensive Care, Princess Royal Hospital, Apley Castle, Telford TF1 6TF, UK
| | - Tulsi Nag
- Department of Anaesthesia and Intensive Care, Ramakrishna Mission Seva Pratishthan, Calcutta, India
| | - Dipanwita Mitra
- Department of Anaesthesia, Dr. B.C. Roy Postgraduate Institute of Paediatric Sciences, Calcutta, India
| | | | - Vikash Singh
- Department of Anaesthesia and Intensive Care, St. James University Hospital, Dublin, Ireland
| | - Gauri Mukherjee
- Department of Anaesthesia, Calcutta National Medical College, Calcutta, India
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Chen H, Chen Q, Chen L, Zhang G. Analysis of risk factors affecting driver injury and crash injury with drivers under the influence of alcohol (DUI) and non-DUI. Traffic Inj Prev 2016; 17:796-802. [PMID: 27064506 DOI: 10.1080/15389588.2016.1168924] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [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: 10/31/2015] [Accepted: 03/15/2016] [Indexed: 06/05/2023]
Abstract
OBJECTIVE The objective of this research was to study risk factors that significantly influence the severity of crashes for drivers both under and not under the influence of alcohol. METHODS Ordinal logistic regression was applied to analyze a crash data set involving drivers under and not under the influence of alcohol in China from January 2011 to December 2014. RESULTS Four risk factors were found to be significantly associated with the severity of driver injury, including crash partner and intersection type. Age group was found to be significantly associated with the severity of crashes involving drivers under the influence of alcohol. Crash partner, intersection type, lighting conditions, gender, and time of day were found to be significantly associated with severe driver injuries, the last of which was also significantly associated with severe crashes involving drivers not under the influence of alcohol. CONCLUSIONS This study found that pedestrian involvement decreases the odds of severe driver injury when a driver is under the influence of alcohol, with a relative risk of 0.05 compared to the vehicle-to-vehicle group. The odds of severe driver injury at T-intersections were higher than those for traveling along straight roads. Age was shown to be an important factor, with drivers 50-60 years of age having higher odds of being involved in severe crashes compared to 20- to 30-year-olds when the driver was under the influence of alcohol. When the driver was not under the influence of alcohol, drivers suffered more severe injuries between midnight and early morning compared to early nighttime. The vehicle-to-motorcycle and vehicle-to-pedestrian groups experienced less severe driver injuries, and vehicle collisions with fixed objects exhibited higher odds of severe driver injury than did vehicle-to-vehicle impacts. The odds of severe driver injury at cross intersections were 0.29 compared to travel along straight roads. The odds of severe driver injury when street lighting was not available at night were 3.20 compared to daylight. The study indicated that female drivers are more likely to experience severe injury than male drivers when not under the influence of alcohol. Crashes between midnight and early morning exhibited higher odds of severe injury compared to those occurring at other times of day. The identification of risk factors and a discussion on the odds ratio between levels of the impact of the driver injury and crash severity may benefit road safety stakeholders when developing initiatives to reduce the severity of crashes.
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Affiliation(s)
- Huiqin Chen
- a Hangzhou Dianzi University , Hangzhou , Zhejiang , China
- b State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University , Changsha , Hunan , China
| | - Qiang Chen
- c CATARC (China Automobile Technology & Research Center) , Tianjin , China
| | - Lei Chen
- a Hangzhou Dianzi University , Hangzhou , Zhejiang , China
| | - Guanjun Zhang
- b State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University , Changsha , Hunan , China
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Fernandes AF, Neves HH, Carvalheiro R, Oliveira JA, Queiroz SA. Body condition score of Nellore beef cows: a heritable measure to improve the selection of reproductive and maternal traits. Animal 2015; 9:1278-84. [PMID: 25703049 DOI: 10.1017/S1751731115000154] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Despite the economic importance of beef cattle production in Brazil, female reproductive performance, which is strongly associated with production efficiency, is not included in the selection index of most breeding programmes due to low heritability and difficulty in measure. The body condition score (BCS) could be used as an indicator of these traits. However, so far little is known about the feasibility of using BCS as a selection tool for reproductive performance in beef cattle. In this study, we investigated the sources of variation in the BCS of Nellore beef cows, quantified its association with reproductive and maternal traits and estimated its heritability. BCS was analysed using a logistic model that included the following effects: contemporary group at weaning, cow weight and hip height, calving order, reconception together with the weight and scores of conformation and early finishing assigned to calves at weaning. In the genetic analysis, variance components of BCS were estimated through Bayesian inference by fitting an animal model that also included the aforementioned effects. The results showed that BCS was significantly associated with all of the reproductive and maternal variables analysed. The estimated posterior mean of heritability of BCS was 0.24 (highest posterior density interval at 95%: 0.093 to 0.385), indicating an involvement of additive gene action in its determination. The present findings show that BCS can be used as a selection criterion for Nellore females.
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Mukherjee S, Gibbons LE, Kristjansson E, Crane PK. Extension of an iterative hybrid ordinal logistic regression/item response theory approach to detect and account for differential item functioning in longitudinal data. Psychol Test Assess Model 2013; 55:127-147. [PMID: 24432199 PMCID: PMC3890358] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Many constructs are measured using multi-item data collection instruments. Differential item functioning (DIF) occurs when construct-irrelevant covariates interfere with the relationship between construct levels and item responses. DIF assessment is an active area of research, and several techniques are available to identify and account for DIF in cross-sectional settings. Many studies include data collected from individuals over time; yet appropriate methods for identifying and accounting for items with DIF in these settings are not widely available. We present an approach to this problem and apply it to longitudinal Modified Mini-Mental State Examination (3MS) data from English speakers in the Canadian Study of Health and Aging. We analyzed 3MS items for DIF with respect to sex, birth cohort and education. First, we focused on cross-sectional data from a subset of Canadian Study of Health and Aging participants who had complete data at all three data collection periods. We performed cross-sectional DIF analyses at each time point using an iterative hybrid ordinal logistic regression/item response theory (OLR/IRT) framework. We found that item-level findings differed at the three time points. We then developed and applied an approach to detecting and accounting for DIF using longitudinal data in which covariation within individuals over time is accounted for by clustering on person. We applied this approach to data for the "entire" dataset of English speaking participants including people who later dropped out or died. Accounting for longitudinal DIF modestly attenuated differences between groups defined by educational attainment. We conclude with a discussion of further directions for this line of research.
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Affiliation(s)
- Shubhabrata Mukherjee
- Correspondence concerning this article should be addressed to: Shubhabrata Mukherjee, PhD, Department of Medicine, University of Washington, 325 9 Avenue, Box 359780, Seattle, WA 98121, USA;
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Huang B, Biro FM, Dorn L. Determination of relative timing of pubertal maturation through ordinal logistic modeling: evaluation of growth and timing parameters. J Adolesc Health 2009; 45:383-8. [PMID: 19766943 PMCID: PMC2756189 DOI: 10.1016/j.jadohealth.2009.02.013] [Citation(s) in RCA: 27] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2008] [Revised: 02/23/2009] [Accepted: 02/25/2009] [Indexed: 11/25/2022]
Abstract
PURPOSE (1) To propose a new method using statistical modeling to determine relative timing of pubertal maturation; (2) to validate the new method by evaluating its relationship with pubertal growth and timing parameters, including age at menarche, age onset of areolar maturation, age of peak height velocity, age at attainment of adult height, adult height, peak height velocity, body mass index, and percent body fat; and (3) to contrast the new method with relative timing of menarche on these pubertal parameters. BACKGROUND The timing of puberty has a well-known impact on anthropometric and psychosocial outcomes. Multiple methods have been used to determine pubertal timing, but all with limitations. A uniformly applicable method is needed for different study designs and study populations. METHODS Using the National Heart Lung and Blood Institute Growth and Health Study data, an ordinal logistic modeling was used to assess relative timing of pubertal maturation. RESULTS The proposed method demonstrated good reliability and strong associations with all pubertal timing parameters, also body mass index and percent body fat. Timing was not significantly associated with adult height and peak height velocity. CONCLUSIONS The proposed method is highly feasible, easy to implement, and valid. The study demonstrated important differences between the relationships of relative timing of secondary sexual characteristics and the timing of menarche on pubertal parameters. The study also demonstrates that individuals with early or late timing at one point of time are likely to maintain the same relative timing throughout puberty.
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Affiliation(s)
- Bin Huang
- Center for Epidemiology and Biostatistics, Cincinnati Children's Hospital Medical Center, Department of Pediatrics, University of Cincinnati, Cincinnati, Ohio 45229, USA.
| | - Frank M. Biro
- Division of Adolescent Medicine, Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati
| | - Lorah Dorn
- Division of Adolescent Medicine, Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati
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Crane PK, Narasimhalu K, Gibbons LE, Pedraza O, Mehta KM, Tang Y, Manly JJ, Reed BR, Mungas DM. Composite scores for executive function items: demographic heterogeneity and relationships with quantitative magnetic resonance imaging. J Int Neuropsychol Soc 2008; 14:746-59. [PMID: 18764970 PMCID: PMC2683684 DOI: 10.1017/s1355617708081162] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Accurate neuropsychological assessment of older individuals from heterogeneous backgrounds is a major challenge. Education, ethnicity, language, and age are associated with scale level differences in test scores, but item level bias might contribute to these differences. We evaluated several strategies for dealing with item and scale level demographic influences on a measure of executive abilities defined by working memory and fluency tasks. We determined the impact of differential item functioning (DIF). We compared composite scoring strategies on the basis of their relationships with volumetric magnetic resonance imaging (MRI) measures of brain structure. Participants were 791 Hispanic, white, and African American older adults. DIF had a salient impact on test scores for 9% of the sample. MRI data were available on a subset of 153 participants. Validity in comparison with structural MRI was higher after scale level adjustment for education, ethnicity/language, and gender, but item level adjustment did not have a major impact on validity. Age adjustment at the scale level had a negative impact on relationships with MRI, most likely because age adjustment removes variance related to age-associated diseases.
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Affiliation(s)
- Paul K Crane
- Department of Medicine, University of Washington, Seattle, Washington, USA.
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