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Journal articlePapageorgiou V, Davies B, Cooper E, et al., 2022,
Influence of material deprivation on clinical outcomes among people living with HIV in high-income countries: a systematic review and meta-analysis, AIDS and Behavior, Vol: 26, Pages: 2026-2054, ISSN: 1090-7165
Despite developments in HIV treatment and care, disparities persist with some not fully benefiting from improvements in the HIV care continuum. We conducted a systematic review to explore associations between social determinants and HIV treatment outcomes (viral suppression and treatment adherence) in high-income countries. A random effects meta-analysis was performed where there were consistent measurements of exposures. We identified 83 observational studies eligible for inclusion. Social determinants linked to material deprivation were identified as education, employment, food security, housing, income, poverty/deprivation, socioeconomic status/position, and social class; however, their measurement and definition varied across studies. Our review suggests a social gradient of health persists in the HIV care continuum; people living with HIV who reported material deprivation were less likely to be virologically suppressed or adherent to antiretrovirals. Future research should use an ecosocial approach to explore these interactions across the lifecourse to help propose a causal pathway.
Journal articleWard H, Flower B, Garcia PJ, et al., 2021,
Journal articleRedd R, Cooper E, Atchison C, et al., 2021,
<ns4:p><ns4:bold>Background: </ns4:bold>This study assesses the behavioural responses to SARS-CoV-2 antibody test results as part of the REal-time Assessment of Community Transmission-2 (REACT-2) research programme, a large community-based surveillance study of antibody prevalence in England.</ns4:p><ns4:p> <ns4:bold>Methods:</ns4:bold> A follow-up survey was conducted six weeks after the SARS-CoV-2 antibody test. The follow-up survey included 4500 people with a positive result and 4039 with a negative result. Reported changes in behaviour were assessed using difference-in-differences models. A nested interview study was conducted with 40 people to explore how they thought through their behavioural decisions.</ns4:p><ns4:p> <ns4:bold>Results:</ns4:bold> While respondents reduced their protective behaviours over the six weeks, we did not find evidence that positive test results changed participant behaviour trajectories in relation to the number of contacts the respondents had, for leaving the house to go to work, or for leaving the house to socialise in a personal place. The qualitative findings supported these results. Most people did not think that they had changed their behaviours because of their test results, however they did allude to some changes in their attitudes and perceptions around risk, susceptibility, and potential severity of symptoms.</ns4:p><ns4:p> <ns4:bold>Conclusions: </ns4:bold>We found limited evidence that knowing your antibody status leads to behaviour change in the context of a research study. While this finding should not be generalised to widespread self-testing in other contexts, it is reassuring given the importance of large prevalence studies, and the practicalities of doing these at scale using self-testing with lateral flow immunoassay (LFIA).</ns4:p>
Journal articleRouten A, O'Mahoney L, Ayoubkhani D, et al., 2021,
Journal articleChadeau M, Wang H, Eales O, et al.,
Randomised community surveys of SARS-CoV-2 infection and vaccine effectiveness in England: REACT-1 study., The Lancet Respiratory Medicine, ISSN: 2213-2600
Background: England experienced a third wave of the COVID-19 epidemic from end May 2021 coinciding with the rapid spread of Delta variant despite high levels of vaccination among adults. Vaccination rates (single-dose) are lower among children aged 16-17 and 12-15 years whose vaccination in England commenced in August and September respectively. Methods: The REACT-1 study involves a series of random cross-sectional surveys in the general population of England aged 5 years and over. Using RT-PCR swab-positivity data from (N=100,527) participants with valid swabs in round 14 (9 to 27 September 2021), we estimated community-based prevalence of SARS-CoV-2 and vaccine effectiveness against infection by combining data with round 13 (24 June to 12 July 2021, N=172,862).Findings: During September 2021 we estimated a mean RT-PCR positivity rate of 0.83% (0.76%, 0.89%) with a reproduction number R overall of 1.03 (0.94, 1.14). Among the 475 sequenced positive swabs, all were Delta variant; 22 (4.63%) included the Y145H mutation in the spike protein associated with the AY.4 sub-lineage, and there was one E484K mutation. Age, region, key worker status, and household size jointly contributed to the risk of swab-positivity. The highest weighted prevalence was observed among children aged 5-12 years at 2.32% (1.96%, 2.73%) and 13-17 years at 2.55% (2.11%, 3.08%). The epidemic grew in those aged 5-11 years with R of 1.42, but decreased in those aged 18-54. At ages 18-64 years, the adjusted vaccine effectiveness against infection was 62.8% (49.3%, 72.7%) after two doses compared to unvaccinated people, for all vaccines combined, and 44.8% (22.5%, 60.7%) and 71.3% (56.6%, 81.0%) for AstraZeneca and Pfizer-BioNTech, respectively. At ages >18 years, weighted prevalence of swab-positivity was 0.35% (0.31%, 0.40%) if second dose was <3 months before their swab but 0.55% (0.50%, 0.61%) for those who received their second dose 3-6 months prior, compared to 1.76% (1.60%, 1.95%) among
Journal articleElliott P, Haw D, Wang H, et al., 2021,
Exponential growth, high prevalence of SARS-CoV-2 and vaccine effectiveness associated with Delta variant, Science, Vol: 374, Pages: 1-11, ISSN: 0036-8075
SARS-CoV-2 infections were rising during early summer 2021 in many countries associated with the Delta variant. We assessed RT-PCR swab-positivity in the REal-time Assessment of Community Transmission-1 (REACT-1) study in England. We observed sustained exponential growth with average doubling time (June-July 2021) of 25 days driven by complete replacement of Alpha variant by Delta, and by high prevalence at younger less-vaccinated ages. Unvaccinated people were three times more likely than double-vaccinated people to test positive. However, after adjusting for age and other variables, vaccine effectiveness for double-vaccinated people was estimated at between ~50% and ~60% during this period in England. Increased social mixing in the presence of Delta had the potential to generate sustained growth in infections, even at high levels of vaccination.
Journal articlevan Bergen JEAM, Hoenderboom BM, David S, et al., 2021,
Journal articleWilson J, Wallace H, Loftus-Keeling M, et al., 2021,
Swab-yourself trial with economic monitoring and testing for infections collectively (SYSTEMATIC): Part 1. A diagnostic accuracy, and cost-effectiveness, study comparing clinician-taken versus self-taken rectal and pharyngeal samples for the diagnosis of gonorrhoea and chlamydia, Clinical Infectious Diseases, Vol: 73, Pages: e3172-e3180, ISSN: 1058-4838
BackgroundUrogenital testing misses extragenital Neisseria gonorrhoeae (NG) and Chlamydia trachomatis (CT). Extragenital self-sampling is frequently undertaken despite no robust RCT evidence of efficacy. We compared clinician-taken rectal and pharyngeal samples with self-taken samples for diagnostic accuracy and cost in MSM and females.MethodsProspective, convenience, sample in UK sexual health clinic. Randomised order of clinician and self-samples from pharynx and rectum, plus first catch urine (MSM) and vulvovaginal swabs (females), for NG/CT detection.ResultsOf 1793 participants (1284 females, 509 MSM), 116 had NG detected (75 urogenital site, 83 rectum, 72 pharynx); 9.4% infected females and 67.3% MSM were urogenital negative. 276 had CT detected (217 urogenital site, 249 rectum, 63 pharynx); 13.1% infected females and 71.8% MSM were urogenital negative. Sexual history did not identify those with rectal infections. Clinician-rectal and self-rectal positive percent agreements (PPA) for NG detection were 92.8% and 97.6%; clinician-rectal, and self-rectal PPA for CT detection were 95.6% and 97.2%. There was no difference in diagnostic accuracy between clinician and self-taken samples.Clinicians performed swabs quicker than participants so costs were lower. However, in asymptomatic people, non-qualified clinicians would oversee self-swabbing and these costs would be lower than clinician’s.ConclusionsThere was no difference in diagnostic accuracy of clinician compared with self-taken extragenital samples. Sexual history did not identify those with rectal infections so individuals should have extragenital clinician, or self-taken, samples. Clinician swabs cost less than self-swabs but in asymptomatic people, or doing home testing, their costs would be lower than clinician swabs.
Journal articleUdeh-Momoh C, Watermeyer T, Sindi S, et al., 2021,
Health, lifestyle and psycho-social determinants of poor sleep quality during the Early Phase of the COVID-19 pandemic: a focus on UK older adults deemed clinically extremely vulnerable, Frontiers in Public Health, Vol: 9, Pages: 1-11, ISSN: 2296-2565
Background: Several studies have assessed the impact of COVID-19-relatedlockdownson sleep quality across global populations. However, no study to date has specifically assessed at-riskpopulations, particularly those at highest risk of complications from coronavirus infection deemed “clinically-extremely-vulnerable-(COVID-19CEV)” [as defined by Public Health England, 2020].Methods: In this cross-sectional study, we surveyed 5,558 adults aged ≥50 years (of whom 523 met criteria for COVID-19CEV) during the first pandemic wave that resulted in a nationwide-lockdown (April-June 2020) with assessments of sleep quality (an adapted sleep scale that captured multiple sleep indices before and during the lockdown), health/medical, lifestyle, psychosocial and socio demographic factors. We examined associations between these variablesand sleep quality;and explored interactions of COVID-19CEV status with significant predictors of poor sleep,to identify potential moderating factors. Results: 37% of participants reported poor sleep quality which was associated with younger age, female sex and multimorbidity. Significant associations with poor sleep included health/medical factors: COVID-19 CEV status, higher BMI, arthritis, pulmonary disease, and mental health disorders; and the following lifestyle and psychosocial factors: living alone, higher alcohol consumption, an unhealthy diet and higher depressive and anxiety symptoms. Moderators of the negative relationship between COVID-19 CEV status and good sleep quality were marital status, loneliness, anxiety and diet. Within this subgroup, less anxious and less lonely males, as well as females with healthier diets, reported better sleep. Conclusions: Sleep quality in older adults was compromised during the sudden unprecedented nation-wide lockdown due to distinct modifiable factors. An important contribution of our study is the assessment of a &ldquo
Journal articleDavies B, Araghi M, Moshe M, et al., 2021,
Acceptability, usability and performance of lateral flow immunoassay tests for SARS-CoV-2 antibodies: REACT-2 study of self-testing in non-healthcare key workers, Open Forum Infectious Diseases, Vol: 8, ISSN: 2328-8957
Background Seroprevalence studies are essential to understand the epidemiology of SARS-CoV-2. Various technologies, including laboratory assays and point-of-care self-tests, are available for antibody testing. The interpretation of seroprevalence studies requires comparative data on the performance of antibody tests. Methods In June 2020, current and former members of the UK Police forces and Fire service performed a self-test lateral flow immunoassay (LFIA), had a nurse-performed LFIA and provided a venous blood sample for ELISA . We present the prevalence of antibodies to SARS-CoV-2; the acceptability and usability of self-test LFIAs; and determine the sensitivity and specificity of LFIAs compared to laboratory ELISA. Results In this cohort of 5189 current and former members of the Police service and 263 members of the Fire service, 7.4% (396/5,348; 95% CI, 6.7-8.1) were antibody positive. Seroprevalence was 8.9% (6.9-11.4) in those under 40 years, 11.5% (8.8-15.0) in those of non-white ethnicity and 7.8% (7.1-8.7) in those currently working. Self-test LFIA had an acceptability of 97.7% and a usability of 90.0%. There was substantial agreement between within-participant LFIA results (kappa 0.80; 0.77-0.83). The LFIAs had a similar performance: compared to ELISA, sensitivity was 82.1% (77.7-86.0) self-test and 76.4% (71.9-80.5) nurse-performed with specificity of 97.8% (97.3-98.2) and 98.5% (98.1-98.8) respectively. Conclusion A greater proportion of this non-healthcare key worker cohort showed evidence of previous infection with SARS-CoV-2 than the general population at 6.0% (5.8-6.1) following the first wave in England. The high acceptability and usability reported by participants and similar performance of self-test and nurse-performed LFIAs indicate that the self-test LFIA is fit for purpose for home-testing in occupational and community prevalence studies.
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