The correlation between altmetric score and traditional measures of article impact for studies pertaining to spine trauma

PURPOSE

It is becoming increasingly common for researchers to share scientific literature via social media. Traditional bibliometrics have long been utilized to measure a study's academic impact, but they fail to capture the impact generated through social media sharing. Altmetric Attention Score (AAS) is a weighted count of all the online attention garnered by a study, and it is currently unclear whether a relationship with traditional bibliometrics exists.

METHODS

We identified the five highest-rated spine-specific and five highest-rated general orthopedic journals by Scopus CiteScore 2020. We then identified all the spine trauma studies across a 5-year span (2016-2020) within these journals and compared AAS with traditional bibliometrics using Independent t-tests and Pearson's correlational analyses.

RESULTS

No statistically significant relationships were identified between AAS and traditional bibliometrics for articles pertaining to spine trauma: Level of Evidence (R = - 0.02, p = 0.34), H-Index Primary Author (R =  < - 0.01, p = 0.50), H-Index Senior Author (R = - 0.04, p = 0.24), and Number of Citations (R = 0.01, p = 0.40). The top five articles by AAS include those pertaining to motorcycle injuries (AAS = 687), orthosis in thoracolumbar fractures (AAS = 199), golfing injuries (AAS = 166), smartphone-based teleradiology (AAS = 41), and auto racing injuries (AAS = 39).

CONCLUSION

The lack of overlap between these types of metrics suggests that AAS or similar alternative metrics should be used to measure an article's social impact. The social impact of an article should likewise be a factor in determining an article's overall impact along with its academic impact as measured by bibliometrics.

A multicentre review of the direct-access mammography programme in Ireland for women with breast pain

AIM

To assess the current use of the direct access mammography pathway for breast pain and the rate of breast cancer detection in this patient cohort.

MATERIALS AND METHODS

A retrospective review of general practitioner (GP)-referred mammograms performed during a 12-month period from January to December 2022 across four tertiary referral centres. With the use of medical records and GP referrals, patient demographics, presenting symptoms, family history, and clinical outcomes were recorded.

RESULTS

The present study comprised 2,046 patients of which 21.6% did not report breast pain at the time of referral. Thirty-five per cent had a positive family history with 40% of these patients having no breast pain. Twelve per cent were recalled with 30% of these patients requiring biopsy. An overall cancer detection rate (CDR) of 7 per 1000 was determined for women with mastalgia. A CDR of 0 per 1,000 was determined for women <50 years with mastalgia alone and no additional risk factors for malignancy. Fisher's exact test showed no statistically significant association between breast pain and breast cancer.

CONCLUSION

There was no statistically significant relationship found between breast pain and breast cancer. This review suggests a low cancer detection rate in women <50 years. In women <50 years with mastalgia without additional symptoms or family history, breast imaging is not required.

Wounding Triggers Wax Biosynthesis in Arabidopsis Leaves in an Abscisic Acid and Jasmonoyl-Isoleucine Dependent Manner

Wounding caused by insects or abiotic factors such as wind and hail can cause severe stress for plants. Intrigued by the observation that wounding induces expression of genes involved in surface wax synthesis in a jasmonoyl-isoleucine (JA-Ile)-independent manner, the role of wax biosynthesis and respective genes upon wounding was investigated. Wax, a lipid-based barrier, protects plants both from environmental threats as well as from an uncontrolled loss of water. Its biosynthesis is described to be regulated by abscisic acid (ABA), whereas the main wound-signal is the hormone JA-Ile. We show in this study, that genes coding for enzymes of surface wax synthesis are induced upon wounding in Arabidopsis thaliana leaves in a JA-Ile-independent but ABA-dependent manner. Furthermore, the ABA-dependent transcription factor MYB96 is a key regulator of wax biosynthesis upon wounding. On the metabolite level, wound-induced wax accumulation is strongly reduced in JA-Ile-deficient plants, but this induction is only slightly decreased in ABA-reduced plants. To further analyze the ABA-dependent wound response, we conducted wounding experiments in high humidity. They show that high humidity prevents the wound-induced wax accumulation in A. thaliana leaves. Together the data presented in this study show that wound-induced wax accumulation is JA-Ile-dependent on the metabolite level, but the expression of genes coding for enzymes of wax synthesis is regulated by ABA.

Public beliefs about the consequences of living with obesity in the Republic of Ireland and Northern Ireland

Background

This study aimed to capture public beliefs about living with obesity, examine how these beliefs have changed over time and to explore whether certain characteristics were associated with them in a nationally representative sample of adults from the Republic of Ireland (RoI) and Northern Ireland (NI).

Methods

A cross-sectional survey employed a random quota sampling approach to recruit a nationally representative sample of 1046 adults across NI and RoI. Telephone interviews captured information on demographics; health behaviours & attitudes; and beliefs about the consequences of obesity (measured using the Obesity Beliefs Scale). Univariable analyses compared beliefs about the consequences of living with obesity between participants with a self-reported healthy weight and those living with overweight or obesity, and non-responders (those for whom weight status could not be ascertained due to missing data). Multiple linear regression examined associations between obesity-related beliefs and socio-demographics, self-rated health and perceived ability to change health behaviours. Multiple linear regression also compared changes in obesity-related beliefs between 2013 and 2020 in the RoI.

Results

Higher endorsement of the negative outcomes of obesity was significantly associated with living with a healthy weight, higher self-rated health, dietary quality and perceived ability to improve diet and physical activity. Those who lived with overweight, with obesity and non-responders were less likely to endorse the negative consequences of obesity. Those living with obesity and non-responders were also more likely to support there is an increased cost and effort in maintaining a healthy weight. Comparison with survey data from 2013 showed that currently, there is a greater endorsement of the health benefits of maintaining a healthy weight (p < 0001), but also of the increased costs associated with it (p < 0001).

Conclusion

Beliefs about the consequences of maintaining a healthy body weight are associated with individuals’ weight, self-rated health, diet and perceived ease of adoption of dietary and exercise-related improvements. Beliefs about the health risks of obesity and perceived greater costs associated with maintaining a healthy weight appear to have strengthened over time. Present findings are pertinent to researchers and policy makers involved in the design and framing of interventions to address obesity.

Supplementary information

The online version contains supplementary material available at 10.1186/s12889-022-14280-9.

Overexpression of the vacuolar sugar importer BvTST1 from sugar beet in Camelina improves seed properties and leads to altered root characteristics

Overexpression of the vacuolar sugar transporter TST1 in Arabidopsis leads to higher seed lipid levels and higher total seed yield per plant. However, effects on fruit biomass have not been observed in crop plants like melon, strawberry, cotton, apple, or tomato with increased tonoplast sugar transporter (TST) activity. Thus, it was unclear whether overexpression of TST in selected crops might lead to increased fruit yield, as observed in Arabidopsis. Here, we report that constitutive overexpression of TST1 from sugar beet in the important crop species Camelina sativa (false flax) resembles the seed characteristics observed for Arabidopsis upon increased TST activity. These effects go along with a stimulation of sugar export from source leaves and not only provoke optimised seed properties like higher lipid levels and increased overall seed yield per plant, but also modify the root architecture of BvTST1 overexpressing Camelina lines. Such mutants grew longer primary roots and showed an increased number of lateral roots, especially when developed under conditions of limited water supply. These changes in root properties result in a stabilisation of total seed yield under drought conditions. In summary, we demonstrate that increased vacuolar TST activity may lead to optimised yield of an oil-seed crop species with high levels of healthy ω3 fatty acids in storage lipids. Moreover, since BvTST1 overexpressing Camelina mutants, in addition, exhibit optimised yield under limited water availability, we might devise a strategy to create crops with improved tolerance against drought, representing one of the most challenging environmental cues today and in future.

'Your mascara is running'

Chromhidrosis is a rare disorder, which can have significant psychosocial consequences for patients, particularly when it affects the face, as it can be mistaken for scarring, dirt or erroneous make-up application. Chromhidrosis can be divided into apocrine, eccrine and pseudo subtypes. We present a case of apocrine chromhidrosis localized to the bilateral cheek area.

Different genes may be involved in distal and local sensitisation: a genome-wide gene-based association study and meta-analysis

Background

Neuropathic pain symptoms and signs of increased pain sensitization in osteoarthritis (OA) patients may explain persistent pain after total joint replacement (TJR). Therefore, identifying genetic markers associated with pain sensitization and neuropathic‐like pain phenotypes could be clinically important in identifying targets for early intervention.

Methods

We performed a genome‐wide gene‐based association study (GWGAS) using pressure pain detection thresholds (PPTs) from distal pain‐free sites (anterior tibia), a measure of distal sensitization, and from proximal pain‐affected sites (lateral joint line), a measure of local sensitization, in 320 knee OA participants from the Knee Pain and related health in the Community (KPIC) cohort. We next performed gene‐based fixed‐effects meta‐analysis of PPTs and a neuropathic‐like pain phenotype using genome‐wide association study (GWAS) data from KPIC and from an independent cohort of 613 post‐TJR participants, respectively.

Results

The most significant genes associated with distal and local sensitization were OR5B3 and BRDT, respectively. We also found previously identified neuropathic pain‐associated genes—KCNA1, MTOR, ADORA1 and SCN3B—associated with PPT at the anterior tibia and an inflammatory pain gene—PTAFR—associated with PPT at the lateral joint line. Meta‐analysis results of anterior tibia and neuropathic‐like pain phenotypes revealed genes associated with bone morphogenesis, neuro‐inflammation, obesity, type 2 diabetes, cardiovascular disease and cognitive function.

Conclusions

Overall, our results suggest that different biological processes might be involved in distal and local sensitization, and common genetic mechanisms might be implicated in distal sensitization and neuropathic‐like pain. Future studies are needed to replicate these findings.

Significance

To the best of our knowledge, this is the first GWAS for pain sensitization and the first gene‐based meta‐analysis of pain sensitization and neuropathic‐like pain. Higher pain sensitization and neuropathic pain symptoms are associated with persistent pain after surgery hence, identifying genetic biomarkers and molecular pathways associated with these traits is clinically relevant.

Rat-Bite Fever: Developing and testing a modified time-kill protocol based on Edberg and Edberg 1983 experiemnt in order to test S. moniliformis growth in 0.05% SPS and proposed growth curve

Introduction/Objective

Streptobacillus moniliformis is the primary causative agent of rat-bite fever (RBF) and Haverhill fever (HF). Rat-bite fever and Haverhill fever are difficult to diagnose in a clinical setting and are likely severely under-represented and under-reported worldwide. Clinical presentation often includes fever, chills, myalgia, headache, and vomiting. Patients may also develop a maculopapular rash covering their extremities approximately 2-4 days after onset of fever followed by polyarthritis in roughly 50% of patients with a mortality rate of 10-13% if left untreated. This is further complicated by the fact that submission and processing guidelines of clinical samples for the recovery of the organism are based on ‘outdated’ techniques and clinical laboratory methods that are over 50 years removed from current procedures, instrumentation and guidance.

Methods/Case Report

DNA from collected frozen time-point samples, were collected (n=84) and extracted using an in-house custom protocol utilizing 180 µl of bacterial lysis buffer with 20 µl of PCR grade proteinase K, for a total of 200 µl. The blood culture time-point samples were then thawed on ice, and 200 µl of blood culture sample was then added to the lysis mix, vortexed and incubated at 65°C for 10 minutes (an additional 95°C inactivation step was omitted to avoid whole blood clotting). After incubation, each sample was vortexed briefly again and extracted using the Roche automated MagNA Pure Compact instrument with an initial input volume of 400 µl and stored in a final elution buffer volume of 100 µl. All quantatitive time kill data was colleced via a CDC in-house designed PCR assay developed for S. moniliformis.

Results (if a Case Study enter NA)

Experimenting with varying amounts of blood inoculum, 10 ml of blood was determined to provide the best results for detection and growth/viability as well as propose a theoretical growth curve for the organism.

Conclusion

We found that in 100% of the isolates tested (and all the variations of testing within), SPS (up to a concentration of 0.05 % w/v) in commercially available blood culture bottles appeared to be inactivated, allowing for the growth detection and culturing of S. moniliformis using an automated continuous blood culture system when 10 ml of blood was inoculated.

Who would like a monster like me to be alive? Obsessive compulsive disorder or pedophilia in a patient with high functioning autism spectrum disorder

Introduction

Case of a 17yo patient with high functioning ASD and OCD with obsessions about being a pedophile, with suicidal ideation and self-harming behaviors. He was followed in outpatient care for one year since his first contact with Mental Health, following an inpatient admission for suicidal ideation.

Objectives

Differential diagnosis between OCD, ASD and possible pedophilia. Learn about different levels of care involved, and other possibilities. Therapy resources used.

Methods

Description of the case report: description of initial and final Mental Status Exam Differential Diagnosis: ASD vs OCD vs Pedophilia vs Depressive Disorder Children’s Yale-Brown Obsessive Compulsive Scale Therapy: family based therapy, and Exposure response prevention therapy.

Results

Intrusive images, and reassurance seeking, helped with OCD diagnosis. ASD made symptoms harder to manage with SSRIs alone, which drove to add Aripiprazol at low doses in outpatient care. CY-BOCS showed obsessions other than doubts about being a pedophile. He participated in Exposure response prevention therapy with response, especially when antipsychotic medication was added. Family based therapy worked with his parents in not providing excessive reassurance, and with the patient in gaining insight about his OCD. Decreased anxiety, decreased self-deprecation and no new suicidal thoughts Functionality of the patient in the community improved, with possibility of going college next year.

Conclusions

Recommendation of good assessment of sexuality in ASD population Importance of individual and family therapy for OCD and specially when there is poor judgement and insight in the patient. Importance of combined treatment: pharmacology + therapy

Conflict of interest

Alicia Koplowitz Foundation

POS0006 NX-5948, A SELECTIVE DEGRADER OF BTK, SIGNIFICANTLY REDUCES INFLAMMATION IN A MODEL OF AUTOIMMUNE DISEASE

Background:

Aberrant activation of B cells and autoantibody mediated tissue damage are hallmarks of autoimmune diseases such as systemic lupus erythematosus (SLE) and rheumatoid arthritis (RA). Therefore, novel treatments that prevent autoantibody generation or antibody-mediated end organ tissue damage are of high interest. Bruton’s tyrosine kinase (BTK) transduces signals downstream of the B cell receptor (BCR), toll-like receptors, and Fc receptors in B cells and myeloid cells [1]. Overexpression of BTK in B cells leads to hyperactive BCR signaling, plasma cell generation, autoantibody secretion, and an SLE-like disease in mice [2]. Conversely, reducing BTK expression in B cells can ameliorate disease in Lyn-deficient mice.[3] BTK inhibitors, such as evobrutinib, have entered clinical studies for the treatment of autoimmune diseases.[4]

Objectives:

Small molecule-induced protein degradation offers a unique approach to target BTK; this approach simultaneously eliminates both BTK kinase activity and BTK-mediated scaffolding interactions in the signalosome. Chimeric Targeting Molecules (CTMs) are small molecules that catalyze ubiquitylation and proteasomal degradation of target proteins and are comprised of a ubiquitin ligase binding element (“harness”), a linker, and a target binding element (“hook”). NX-5948 is a CTM that contains a BTK hook linked to a cereblon (CRBN) harness. We examined the activity of NX-5948 in a collagen-induced arthritis model as part of an assessment of its potential as a drug candidate for autoimmune disease.

Methods:

Cellular degradation of BTK, Aiolos and Ikaros as well as induction of CD69 and CD86 was determined using flow cytometry. Degradation of BTK in CD-1 mice or cynomolgus monkey was determined using flow cytometry analysis. In a collagen-induced arthritis (CIA) model, mice were vaccinated with type II collagen and treated before the onset of symptoms. Serum cytokine and anti-type II collagen antibody levels were determined using Luminex and ELISA, respectively.

Results:

In human PBMCs, NX-5948 degrades BTK at sub-nanomolar concentrations and inhibits BCR signaling as measured by CD69 and CD86 induction in anti-IgM-stimulated B cells with similar potency. Oral administration of NX-5948 in mice leads to BTK degradation to <10% of baseline levels in circulating and splenic B cells. NX-5948 also promotes potent BTK degradation in cynomolgus monkeys, and it can suppress BTK levels to <10% of baseline levels after a single oral dose as low as 10 mg/kg.

Unlike IMiD drugs such as lenalidomide, the CRBN harness of NX-5948 was designed to avoid the degradation of known CRBN neo-substrates Aiolos (IKZF3) and Ikaros (IKZF1). In primary human T cells, NX-5948 induces minimal degradation of Aiolos and Ikaros and does not promote IL-2 secretion suggesting that NX-5948 does not convey IMiD activity associated with agents such as lenalidomide.

We examined the activity of NX-5948 in a mouse CIA model compared to that of the BTK inhibitor ibrutinib or dexamethasone as a positive control. In mice treated with NX-5948, symptoms of arthritis were resolved, and a significant reduction in arthritis clinical score was observed. Treatment with NX-5948 resulted in a reduction in anti-type II collagen titer and serum levels of the pro-inflammatory cytokine IL-6. Treatment with NX-5948 yielded superior anti-inflammatory activity relative to ibrutinib and similar activity to dexamethasone. Treatment with NX-5948 was well-tolerated and, unlike dexamethasone, did not promote body weight loss.

Conclusion:

Degradation of BTK by NX-5948 shows robust activity in a CIA model compared to existing agents tested as controls. These findings provide support for further investigation of NX-5948 in additional models of autoimmune disease to inform plans for clinical development.

References:

[1]Crofford et al. 2016. Expert Rev Clin Immunol 12: 763–773.

[2]Kil et al. 2012. Blood 119: 3744-3756.

[3]Whyburn et al. 2003. J Immunol 171: 1850-1858.

[4]Haselmayer, et. Al. 2019. J Immunol 202: 2888-2906.

Disclosure of Interests:

DANIEL ROBBINS Shareholder of: Nurix therapeutics, Employee of: Nurix therapeutics, Mark Noviski Shareholder of: Nurix Therapeutics, Employee of: Nurix Therapeutics, May Tan Shareholder of: Nurix Therapeutics, Employee of: Nurix Therapeutics, Cristiana Guiducci Shareholder of: Nurix Therapeutics, Employee of: Nurix Therapeutics, Timothy Ingallinera Shareholder of: Nurix Therapeutics, Employee of: Nurix Therapeutics, Dane Karr Shareholder of: Nurix Therapeutics, Employee of: Nurix Therapeutics, Aileen Kelly Shareholder of: Nurix Therapeutics, Employee of: Nurix Therapeutics, Zef Konst Shareholder of: Nurix Therapeutics, Employee of: Nurix Therapeutics, Austin Tenn-McClellan Shareholder of: Nurix Therapeutics, Employee of: Nurix Therapeutics, Jenny McKinnell Shareholder of: Nurix Therapeutics, Employee of: Nurix Therapeutics, Luz Perez Employee of: Nurix Therapeutics, Gwenn Hansen Shareholder of: Nurix Therapeutics, Employee of: Nurix Therapeutics, Ryan Rountree Shareholder of: Nurix Therapeutics, Employee of: Nurix Therapeutics

264 Intertrochantic Hip Fracture Fixation at Musgrove Park Hospital

Background

Hip fractures, the commonest fragility fracture in the UK, carry a 6.7% 30-day mortality. NICE-CG124 guide advises extramedullary implants for trochanteric (AO3.1A1/2) and intramedullary nails for subtrochanteric fractures.

We carried out a retrospective study on the use of cephalomedullary nails (CMN) at MPH to determine compliance with CG124.

Method

National Hip Fracture Database (NHFD) from 2019 was reviewed. Trust records were used for fracture type, surgery, and reasons for deviation from CG124.

Results

201 fractures were identified. NHFD revealed 38 A3 fractures of which 36 underwent CMN, one SHS and one non-operative management. Of 163 A1/A2 fractures, 33 received CMN and 130 CHS.

Only 77% of the NHFD data was correct. Further analysis revealed 18 CMNs were used for AO1/2 injuries. All had justifiable reasons for deviation from CG124, although not documented.

Conclusions

There is scope to improve accuracy of NHFD data. Deviation from guidelines may be appropriate but reasons must be documented and, when appropriate, discussed with patient. Similar nationwide inaccuracy can have significant implications for research based upon NHFD data. To prevent input of incorrect data, our recommendations include: Consultant to confirm AO grade during trauma meetings Reason CMN used for AO1/2 fractures to be documented Monthly local NHFD data audit

BOOSTing patient mobility and function on a general medical unit by enhancing interprofessional care

Low mobility during hospitalization remains prevalent despite associated negative consequences. The goal of this quality improvement (QI) project was to increase patient mobility and function by adding a physical therapist (PT) to an existing interprofessional care team. A mobility technician assisted treatment group patients with mobility during hospitalization based on physical therapist recommendations. Change in functional status and highest level of mobility achieved by treatment group patients was measured from admission to discharge. Observed hospital length of stay (LOS), LOS index, and 30-day all cause hospital readmission comparisons between treatment group and a comparison group on the same unit, and between cross-sectional comparison groups one year prior were used for Difference in Difference analysis. Bivariate comparisons between the treatment and a cross-sectional comparison group from one year prior showed a statistically significant change in LOS Index. No other bivariate comparisons were statistically significant. Difference in Difference methods showed no statistically significant change in observed LOS, LOS Index, or 30-day readmission. Patients in the treatment group had statistically significant improvements in functional status and highest level of mobility achieved. Physical function and mobility improved for patients who participated in mobility sessions. Mobility technicians may contribute to improved care quality and patient safety in the hospital.

A re-evaluation of teenage sunbed use following the introduction of banning legislation for under 18-year-olds

Background

There is little information on the effectiveness of introducing age restriction legislation alone to reduce the rate of sunbed usage by teenagers. Prior to the Public Health (Sunbed) Act of 2014 prohibiting the use of sunbeds in under 18-year-olds in Ireland we reported the rate of sunbed use at 7.5%.

Objectives

The aim of the study was to compare the rate of sunbed usage among Irish teenagers before and after the introduction of banning legislation to determine if it had the desired effect of reducing its rate of use.

Methods

In a cross-sectional survey, students from the same schools as in our previous study completed an anonymous, written questionnaire pertaining to sunbed usage.

Results

In total, 783 questionnaires, from 13 schools across Ireland, were completed. The rate of sunbed use in the current study was 7.2%, compared to 7.5% in the pre-ban study, (P = 0.76). A higher rate of sunbed use was observed in Dublin schools and female public students.

Conclusion

Our study suggests that legislation alone is ineffective at reducing sunbed usage in a teenage population. A multifaceted approach is required that includes enforcement of the legislation together with targeted public education and awareness campaigns using all aspects of the media.

THU0565 RESEARCHERS’ PERSPECTIVES ON ADHERENCE INTERVENTION RESEARCH AND OUTCOMES IN RHEUMATOLOGY: AN INTERNATIONAL QUALITATIVE STUDY

Background:

Medication non-adherence is a significant problem among patients with rheumatic diseases. Research on adherence interventions in rheumatology is limited and disappointing, with studies using heterogeneous outcomes. Understanding these limitations is needed to inform the design of better interventions and research studies.

Objectives:

To describe researchers’ perspectives and experiences on adherence intervention research and outcomes in rheumatology.

Methods:

Semi-structured interviews using video conference were conducted with researchers who had been an investigator on an adherence study of any design in the past 10 years. Interviews were recorded and transcribed verbatim. Participants were asked about their experiences with conducting adherence research and perspectives on introduction of a core domain set of outcomes for adherence intervention trials in rheumatology. Data collection and thematic analysis were conducted iteratively, until saturation.

Results:

We interviewed 13 researchers from seven countries (Australia, Belgium, Canada, Netherland, Thailand, UK, and USA). A majority worked in academia (75%), specialized in epidemiology and/or health services research (62%) and had led between 2-5 adherence studies in the past five years (62%).

Three themes were identified:1) challenges in designing, conducting and evaluating adherence studies;2) current outcomes in adherence intervention studies and their relevance; and3) implementing a core domain set of outcomes for adherence intervention studies.

Major challenges in conducting adherence research included inconsistent adherence terminology and measurement. Participants noted a lack of guidance on outcome selection and measurement when evaluating the effectiveness of an adherence intervention and indicated their preference for research to report adherence, intervention-specific, and health-related outcomes. Finally, implementing a core domain set of outcomes was thought to be challenging but valuable in strengthening the evidence (by facilitating meta-analysis), and improving clinical outcomes (by informing clinicians about the effectiveness of interventions).

Conclusion:

Adherence research in rheumatology has been hindered by lack of standardization and guidance on terminology, measurement and outcome selection. Our findings form the basis for recommendations for improving the design, conduct and evaluation of adherence intervention studies in rheumatology, particularly for developing a core domain set of outcomes to improve consistency and facilitate comparisons.

Table 1.

Themes and representative quotations.

Theme 1: Challenges in designing, conducting and evaluating studies of adherence interventions“…the people you often most want in your sample are the people who are non-adherent and often the people who are non-adherent are the people who are hardest to recruit.”“Long term the issue has been about measurements because people confuse and conflate various aspects of medication adherence.Theme 2: Current outcomes in adherence intervention studies and their relevance“you have a whole range of outcomes…psychological outcomes…there’s measures of health care utilization and things like attendance at hospital, nurse appointments and duration, things like times off work,, and also all the relevant clinical outcomes.”Theme 3: Implementing a core domain set of outcomes for adherence intervention studies“…will make trials more comparable and increase the likelihood that you’d be able to combine efforts internationally”

Disclosure of Interests:

Shahrzad Salmasi: None declared, Ayano Kelly: None declared, Susan J. Bartlett Consultant of: Pfizer, UCB, Lilly, Novartis, Merck, Janssen, Abbvie, Speakers bureau: Pfizer, UCB, Lilly, Novartis, Merck, Janssen, Abbvie, Maarten de Wit Grant/research support from: Dr. de Wit reports personal fees from Ely Lilly, 2019, personal fees from Celgene, 2019, personal fees from Pfizer, 2019, personal fees from Janssen-Cilag, 2017, outside the submitted work., Consultant of: Dr. de Wit reports personal fees from Ely Lilly, 2019, personal fees from Celgene, 2019, personal fees from Pfizer, 2019, personal fees from Janssen-Cilag, 2017, outside the submitted work., Speakers bureau: Dr. de Wit reports personal fees from Ely Lilly, 2019, personal fees from Celgene, 2019, personal fees from Pfizer, 2019, personal fees from Janssen-Cilag, 2017, outside the submitted work., Lyn March: None declared, Allison Tong: None declared, Peter Tugwell: None declared, Kathleen Tymms: None declared, Suzanne Verstappen Grant/research support from: BMS, Consultant of: Celltrion, Speakers bureau: Pfizer, Mary De Vera: None declared

0896 Nutritional Status Improves Following The Implementation Of Positive Airway Pressure For The Treatment Of Obstructive Sleep Apnea In Youth With Down Syndrome

Introduction

In typically developing youth, increases in body mass index (BMI) and rates of obesity accompany treatment of obstructive sleep apnea syndrome (OSAS) with adenotonsillectomy regardless of baseline BMI and OSAS severity. Residual OSAS following adenotonsillectomy and overweight/obesity are common in Down syndrome (DS). We sought to examine the impact of positive airway pressure (PAP) on BMIZ in youth with DS and OSAS.

Methods

Baseline, 6, and 12 month height/length and weight as well as pre-PAP PSG data were abstracted from the Children’s Hospital of Philadelphia Sleep Center for patients with DS and OSAS initiated on PAP between 01/01/2014-07/11/01/2017 (N=73; Median age=6.6y IQR: 3.6-12.1; 52% White, 29% Black; 42% Male). BMIZ was calculated. Longitudinal mixed effects models adjusted for adherence from 0-6 months, baseline BMIZ, and baseline SpO2 nadir were used to evaluate change in BMIZ at months 6 and 12 and the impact of baseline BMIZ on trajectories.

Results

OAHI (median; IQR) at initiation was 15.9 (8.1-28.9) events/hour, SpO2 nadir was 83% (77-88), and BMIZ was 1.50 (0.94-2.34). No differences in BMIZ at 6 and 12 months compared to baseline BMIZ were found (p&gt;0.2 for both). Baseline BMIZ was associated with BMIZ at 6- and 12 months (β-coefficient=0.99; p&lt;0.0001); the increase in BMIZ at 12 mo (β-coefficient= 0.49, p=0.001) was offset with decreasing BMIZ (12mo*baseline BMIZ β-coefficient= -0.3; p&lt;0.0001); such that lower BMIZ was associated with increases in BMIZ while higher BMIZ was associated with decreases in BMIZ.

Conclusion

Initiation of PAP has a beneficial impact on nutritional status in youth with DS and OSAS. In youth who are at the lower end of BMIZ, BMIZ increases to a healthier status following the initiation of PAP, and in youth who are at the higher side of BMIZ, BMIZ decreases to a healthier status. Prospective studies are needed to elaborate on these associations.

Support

None

Microplastic contamination in east Antarctic sea ice

The durability of plastics in the marine environment has led to concerns regarding the pervasiveness of this debris in remote polar habitats. Microplastic (MP) enrichment in East Antarctic sea ice was measured in one ice core sampled from coastal land-fast sea ice. The core was processed and filtered material was analyzed using micro Fourier-Transform Infrared (μFTIR) spectroscopy. 96 MP particles were identified, averaging 11.71 particles L^-1. The most common MP polymers (polyethylene, polypropylene, and polyamide) were consistent with those most frequently represented in the majority of marine MP studies. Sea-ice MP concentrations were positively related with chlorophyll a, suggesting living biomass could assist in incorporating MPs in sea ice. Our preliminary results indicate that sea ice has the potential to serve as a reservoir for MP debris in the Southern Ocean, which may have consequences for Southern Ocean food webs and biogeochemistry.

CRISPR-based reagents to study the influence of the epigenome on gene expression

The use of epigenome editing is set to expand our knowledge of how epigenetic landscapes facilitate gene expression capacity within a given cell. As epigenetic landscape profiling in health and disease becomes more commonplace, so does the requirement to assess the functional impact that particular regulatory domains and DNA methylation profiles have upon gene expression capacity. That functional assessment is particularly pertinent when analysing epigenomes in disease states where the reversible nature of histone and DNA modification might yield plausible therapeutic targets. In this review we discuss first the nature of the epigenetic landscape, secondly the types of factors that deposit and erase the various modifications, consider how modifications transduce their signals, and lastly address current tools for experimental epigenome editing with particular emphasis on the immune system.

Reliability Assessment of a Plaque Scoring Index Using Photographs

Objectives: The need to evaluate the reliability of a clinical index before using it as a research tool is clearly recognized. Therefore the aim of this study was to evaluate whether a new calibration method by means of photographs would be useful for assessing the examiners’ reliability in the interpretation of a plaque index.

Methods: Nine children were randomly recruited from a public school in Rio de Janeiro, Brazil. Two trained examiners evaluated these children for dental plaque, in a classroom environment, in order to record plaque scores. The children’s teeth were dyed and colored photographs were taken of all tooth surfaces using a camera, mouth mirrors and lip retractors. The photographs were evaluated to select and identify the best visible tooth surfaces, and the final sample consisted of 343 tooth surfaces. One week after the clinical examination, both examiners scored the tooth surfaces from the photographs according to the index used. The intra and inter-examiner agreements were measured by intra-class correlation coefficient (ICC) for individual mean scores and for tooth surfaces scores.

Results: The data showed an excellent agreement (ICC > 0.80) between clinical and photographic examinations, for both examiners, both for tooth surface and patient analysis. The statistics also demonstrated excellent (ICC > 0.80) inter-examiner agreement on clinical and photographic examinations.

Conclusion: The method seems to be an effective technique to evaluate the reliability of the plaque index, improving the reproducibility of epidemiological studies.

Accuracy of co-morbidity data in patients undergoing abdominal wall hernia repair: a retrospective study

OBJECTIVES

To determine the baseline accuracy, sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) of routinely collected co-morbidity data in patients undergoing abdominal wall hernia repair.

METHODS

All patients aged > 18 who underwent umbilical, para-umbilical, inguinal or incisional hernia repair between 1 January 2015 and 1 November 2016 were identified. All parts of the clinical notes were searched for co-morbidities by two authors independently. The following co-morbidities were considered: hypertension, ischaemic heart disease (IHD), diabetes, asthma, chronic obstructive pulmonary disease (COPD), cerebrovascular disease (CVD), chronic kidney disease (CKD), hypercholesterolemia, obesity and smoking. The co-morbidities data from clinical notes were compared with corresponding data in hospital episode statistics (HES) database to calculate accuracy, sensitivity, specificity, PPV and NPV of HES codes for co-morbidities. To assess the agreement between clinical notes and HES data, we also calculated Cohen's Kappa index value as a more robust measure of agreement.

RESULTS

Overall, 346 patients comprising 3460 co-morbidity codes were included in the study. The overall accuracy of HES codes for all co-morbidities was 77% (Kappa: 0.13). When calculated separately for each co-morbidity, the accuracy was 72% (Kappa: 0.113) for hypertension, 82% (Kappa: 0.232) for IHD, 85% (Kappa: 0.203) for diabetes, 86% (Kappa: 0.287) for asthma, 91% (Kappa: 0.339) for COPD, 92% (Kappa: 0.374) for CVD, 94% (Kappa: 0.424) for CKD, 74% (Kappa: 0.074) for hypercholesterolemia, 71% (Kappa: 0.66) for obesity and 24% (Kappa: 0.005) for smoking. The overall sensitivity, specificity, PPV and NPV of HES codes were 9, 100, 100, and 77%, respectively. The results were consistent when individual co-morbidities were analyzed separately.

CONCLUSIONS

Our results demonstrated that HES co-morbidity codes in patients undergoing abdominal wall hernia repair are specific with good positive predictive value; however, they have substandard accuracy, sensitivity, and negative predictive value. The presence of a relatively large number of false negative or missed cases in HES database explains our findings. Better documentation of co-morbidities in admission clerking proforma may help to improve the quality of source documents for coders, which in turn may improve the accuracy of coding.