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Background Although randomized controlled trials are the gold standard design for cause-effect analysis, high costs and challenges around practicability, feasibility, and ethics may limit their use. In such situations, causal inference methods can improve the rigor of cause-effect analysis using observational data but such methods have infrequently been applied in tuberculosis (TB) research. We conducted a parallel comparison across three causal inference methods in order to assess the causal association between missed clinic visit/s and treatment success among people with drug-susceptible bacteriologically confirmed pulmonary TB. Methods We used causal inference methods to analyze cross-sectional data of adults with drug-susceptible bacteriologically confirmed pulmonary TB at clinics in rural eastern Uganda. We compared effect estimates from three causal inference methods, namely instrumental variable analysis, propensity-score analysis (adjustment, matching, weighting, and stratification), and double-robust estimation for cause-effect analysis. The exposure was missing a TB clinic visit/s and the outcome was treatment success defined as cure or treatment completion, both measured on a binary scale. Covariates were selected based on the literature, and their social and biological relevance to the outcome. We report the odds ratio and 95% confidence interval from each causal analysis. Results Of 762 participants (mean age of 39.3 ± 15.8 years) included, 186 (24.4%) had missed a clinic visit/s while 687 (90.2%) were successfully treated for TB. Missed clinic visit/s lowered treatment success across all analyses with instrumental variable analysis (OR 0.41, 95% CI 0.20–0.82), propensity-score analysis (adjustment [OR 0.49, 95% CI 0.30–0.82], matching [OR 0.43, 95% CI 0.21–0.91)], weighting [OR 0.52, 95% CI 0.30–0.91], and stratification [OR 0.34, 95% CI 0.19–0.62]), and double-robust estimation (OR 0.49, 95% CI 0.28–0.85). Conclusions Missed clinic visit/s reduced the likelihood of TB treatment success rate across all causal inference methods, supporting a causal relationship. Studies are needed to examine interventions that enhance retention in TB treatment.

Disclosure of human immunodeficiency virus (HIV) status improves adherence to antiretroviral therapy (ART) and increases the chance of virological suppression and retention in care. However, information on the effect of disclosure of HIV status on adherence to clinic visits and patient representation is limited. We evaluated the effects of disclosure of HIV status on adherence to clinic visits and patient representation among people living with HIV in eastern Uganda. In this quasi-randomized study, we performed a propensity-score-matched analysis on observational data collected between October 2018 and September 2019 from a large ART clinic in eastern Uganda. We matched participants with disclosed HIV status to those with undisclosed HIV status based on similar propensity scores in a 1:1 ratio using the nearest neighbor caliper matching technique. The primary outcomes were patient representation (the tendency for patients to have other people pick-up their medications) and adherence to clinic visits. We fitted a logistic regression to estimate the effects of disclosure of HIV status, reported using the odds ratio (OR) and 95% confidence interval (CI). Of 957 participants, 500 were matched. In propensity-score matched analysis, disclosure of HIV status significantly impacts adherence to clinic visits (OR = 1.63; 95% CI, 1.13-2.36) and reduced patient representation (OR = O.49; 95% CI, 0.32-0.76). Sensitivity analysis showed robustness to unmeasured confounders (Gamma value = 2.2, p = 0.04). Disclosure of HIV status is associated with increased adherence to clinic visits and lower representation to collect medicines at the clinic. Disclosure of HIV status should be encouraged to enhance continuity of care among people living with HIV.

Anti-retroviral therapy (ART) improves the quality of life (QoL) among people living with human immunodeficiency virus (PLWH). Most studies documenting the gains in QoL have been conducted among persons starting treatment at advanced HIV disease. In the era of Universal Test and Treat (UTT) policy, most PLWH start ART early with high CD4 counts. Therefore, we investigated the association between baseline CD4 count with QoL and retention among PLWH during UTT in southwestern Uganda. Between June 11, 2019, and June 10, 2020, we reviewed medical records for PLWH initiated on ART between April 2017 and September 2018 and interviewed them to collect QoL data. The primary exposure was CD4 count at ART initiation categorized as <500 cells/µl (low) versus ≥500 cells/µl (high). Physical and mental health-related QoL were the primary outcomes. Retention was the secondary outcome. Binary logistic regression was used to assess the association between the exposure and the primary outcome, while the Cox Proportional Hazard regression model was used for the secondary outcome. Of 300 participants, 59.7% initiated ART at a low baseline CD4 count. ART initiation at a higher baseline CD4 count, compared to a lower baseline CD4 count, was associated with a lower mental health-related QoL (adjusted odds ratio [aOR] 0.56, 95% confidence interval [CI] 0.32-0.97) but similar physical health-related QoL (aOR 0.54, 95% CI 0.10-2.78) and retention (adjusted hazard ratio [aHR] 0.30, 95% CI 0.08-1.14). In this cohort of PLWH on ART, those who initiated the treatment at a higher baseline CD4 were less likely to have good mental health-related QoL functioning compared to those initiating at lower CD4 counts. However, the two groups were comparable in physical health-related QoL and retention in care. PLWH initiating ART at a higher baseline CD4 may require mental health-related support as part of treatment.

There is inconsistent data about condom use at the last sexual intercourse (LSI) among university students in sub-Saharan Africa (SSA) and its association with sex, age, and condom negotiation efficacy. The primary objective of this study was to summarize the proportion of condom use at the LSI among university students in SSA. The secondary objective was to determine the association between condom use at the LSI with sex, age, and condom negotiation efficacy among university students in SSA. In this systematic review and meta-analysis, two reviewers independently searched electronic databases and grey literature for eligible studies published until July 30, 2020, extracted data, and assessed the risk of bias in the included studies. We used the Dersimonian-Liard random-effects model to pool the proportion of condom use at the LSI and the association between condom use at the LSI with sex, age, and condom negotiation efficacy, reported using risk ratio (RR). We assessed publication bias using funnel plot and Egger's test, and explored sources of heterogeneity using sub-group and meta-regression analyses. We meta-analyzed 44 studies with a combined sample size of 27,948 participants.Of 14,778 sexually active participants, 8,744 (pooled proportion, 52.9%; 95% CI, 45.0-60.7; 95% prediction interval, 2.8-98.9; I-squared = 99.0%, p< 0.0001) reported condom use at the LSI and the proportion of condom use at the LSI remained stagnant between 2000 and 2019 (p = 0.512). Condom use at the LSI was not associated with being a female compared to a male (pooled RR, 1.08; 95% CI, 0.68-1.71), being of a younger age (≤24 years old) compared to older age (25 years and more) (pooled RR, 1.16; 95% CI, 0-85-1.57), and having a higher condom negotiation efficacy compared to a lower condom negotiation efficacy (pooled RR, 1.54; 95% CI, 0-81-2.94). We found a low and heterogenous use of a condom at the LSI among university students in SSA which was not associated with sex, age, or condom negotiation efficacy. Accordingly, context-relevant interventions are needed to improve condom use at the LSI among university students in SSA.

Limited capacity, deep mistrust pose challenges to sharing A growing number of government agencies, funding organizations, and publishers are endorsing the call for increased data sharing, especially in biomedical research, many with an ultimate goal of open data. Open data is among the least restrictive forms of data sharing, in contrast to managed access mechanisms, which typically have terms of use and in some cases oversight by the data generators themselves. But despite an ethically sound rationale and growing support for open data sharing in many parts of the world, concerns remain, particularly among researchers in low- and middle-income countries (LMICs) in Africa, Latin America, and parts of Asia and the Middle East that comprise the Global South. Drawing on our perspective as researchers and ethicists working in the Global South, we see opportunities to improve community engagement, raise awareness, and build capacity, all toward improving research and data sharing involving researchers in LMICs.

Background Successful treatment of tuberculosis leads to clinical and public health benefits such as reduction in transmission, complications, and mortality among patients. However, data are limited on treatment outcomes and the associated factors among persons with bacteriologically confirmed pulmonary (BC-PTB) in rural areas of high dual tuberculosis and Human Immunodeficiency Virus (HIV) burden countries such as Uganda. We investigated factors associated with successful treatment of tuberculosis and mortality among adult persons with BC-PTB in rural eastern Uganda. Methods We constructed a retrospective cohort of persons with BC-PTB from a routine tuberculosis clinic database in eastern Uganda. We performed bivariate and multivariate analysis. Using a 5% level of significance, we ran a modified Poisson regression analysis to determine factors independently associated with treatment success and mortality rates. Results We retrieved 1123 records for persons with BC-PTB and the treatment outcomes were distributed as follows: 477(42.5%) cured, 323 (28.0%) treatment completed, 17(1.5%) treatment failed, 81(7.2%) died, 89(7.9%) lost to follow-up, and 136(12.1%) not evaluated. Overall, 800 (81.1%) of the 987 persons with BC-PTB that had treatment outcome, were successfully treated. Successful treatment of tuberculosis was less likely to occur among those with HIV infection (Adjusted risk ratio (aRR), 0.88; 95% Confidence Interval (CI), 0.82–0.95), older than 50 years (aRR, 0.89; 95% CI, 0.81–0.97), or male sex (aRR, 0.92; 95% CI, 0.87–0.98). Mortality was associated with HIV infection (aRR, 4.48; 95% CI, 2.95–6.79), older than 50 years (aRR, 2.93; 95% CI, 1.74–4.92), year of enrollment into treatment after 2015 (aRR, 0.80; 95% CI, 0.66–0.97), and Community-Based Directly Observed Therapy Short Course (aRR, 0.26; 95% CI, 0.13–0.50). Conclusions Treatment success rate among adult persons with BC-PTB in rural eastern Uganda is suboptimal and mortality rate is high. HIV infection and older age reduce chances of treatment success, and increase mortality rate. Older and HIV infected persons with BC-PTB will require special consideration to optimize treatment success rate and reduce mortality rate.

Despite the high burden of hearing loss (HL) globaly, most countries in resource limited settings lack infant hearing screening programs(IHS) for early HL detection. We examined the feasibility of establishing an IHS program in this setting, and in this pilot program measured the prevalence of infant hearing loss (IHL) and described the characteristics of the infants with HL. We assessed feasibility of establishing an IHS program at a regional referral hospital in south-western Uganda. We recruited infants aged 1 day to 3 months and performed a three-staged screening. At stage 1, we used Transient Evoked Oto-acoustic Emissions (TEOAEs), at stage 2 we repeated TEOAEs for infants who failed TEOAEs at stage 1 and at stage 3, we conducted Automated brainstem responses(ABRs) for those who failed stage 2. IHL was present if they failed an ABR at 35dBHL. We screened 401 infants, mean age was 7.2 days (SD = 7.1). 74.6% (299 of 401) passed stage 1, the rest (25.4% or 102 of 401) were referred for stage 2. Of those referred (n = 102), only 34.3% (35 of 102) returned for stage 2 screening. About 14.3% (5/35) failed the repeat TEOAEs in at least one ear. At stage 3, 80% (4 of 5) failed the ABR screening in at least one ear, while 25% (n = 1) failed the test bilaterally. Among the 334 infants that completed the staged screening, the prevalence of IHL was 4/334 or 12 per 1000. Risk factors to IHL were Newborn Special Care Unit (NSCU) admission, gentamycin or oxygen therapy and prematurity. IHS program establishment in a resource limited setting is feasible. Preliminary data indicate a high prevalence of IHL. Targeted screening of infants at high risk may be a more realistic and sustainable initial step towards establishing IHS program s in a developing country like Uganda.

Background Hypertension is common among older adults and negatively affects cognitive function. Available data on this association is mostly from resource-rich settings and has been understudied in resource-limited settings especially rural areas where the majority of older persons live. We examined the association between hypertension and cognitive impairment in older persons in Kole, a rural district in Uganda, and examined whether sex modifies the association. Methods We conducted a community-based cross-sectional study among older persons aged ≥ 60 years in rural northern Uganda, using a multi-stage sampling approach. The primary exposure was hypertension measured by systolic (≥ 140 mmHg) or diastolic blood pressure (≥ 90 mmHg), or being on anti-hypertensive medication. The dichotomous outcome was cognitive impairment determined by Montreal Cognitive Assessment scores < 26. We used the modified Poisson regression with robust standard errors for the analysis, applying a 5% significance level. Results We studied 420 participants and found 288 (68.6%) had hypertension while 213 (50.7%) had some cognitive impairment. The overall mean age was 68.4 ± 7.2 years, the mean systolic blood pressure was 138.1 ± 23.1 mmHg while diastolic blood pressure was 85.4 ± 11.9 mmHg, and the mean MOCA score was 17.6 ± 7.2. Hypertension was associated with cognitive impairment (adjusted prevalence risk [aPR] 1.26, 95% CI 1.01–1.57), with 4–5 people in the household (aPR 0.80, 95% CI 0.64–0.99), no smoking history (aPR 0.57, 95% CI 0.43–0.76), and dissatisfaction with one’s health (aPR 1.68, 95% CI 1.27–2.21) and satisfaction with the ability to perform usual domestic duties (aPR 0.74, 95% CI 0.55–0.99) being associated. In a sex-stratified analysis, men with hypertension were more likely to experience cognitive impairment (aPR 2.13, 95% CI 1.33–3.40), compared to those with normal blood pressure but there was no significant association among women (aPR 0.97, 95% CI 0.96–1.24). Conclusion Older persons with hypertension were more likely to experience cognitive impairment than those without. In a sex stratied analysis, this observation persists among men but disappears among women. Our results suggest a need to raise awareness and consider regular blood pressure measurement and control in older adults. We recommend longitudinal studies to examine temporality and suggest blood pressure interventions to prevent cognitive impairment in older age.

ObjectivesTo determine the distribution of career aspirations for the discipline of specialty among undergraduate medical students in sub-Saharan Africa (SSA).DesignWe searched PubMed/MEDLINE, EMBASE Google Scholar and Google for studies published between 1 January 2000 and 31 June 2021. Two reviewers extracted data from eligible studies, with disagreements resolved through consensus with a third reviewer. The random effects model was used to pool proportions, presented with the corresponding 95% CI. Heterogeneity was assessed using Cochrane’s (Q) test but quantified with I2 values. Sources of heterogeneity were checked using meta-regression analysis while publication bias was assessed using funnel plot and Egger’s test.SettingSSA.ParticipantsUndergraduate medical students.OutcomesPrimary outcome was pooled proportion of career aspirations for the discipline of medical specialty and the secondary outcome was reasons for the specialty selection.ResultsWe identified 789 citations but meta-analysed 32 studies, with an overall sample size of 8231 participants. The most popular career aspiration for the discipline of specialty was surgery (29.5%; 95% CI 25.0% to 34.2%), followed by internal medicine (17.3%, 95% CI 11.7% to 23.7%), and then obstetrics and gynaecology (15.0%, 95% CI 12.3% to 17.9%), and paediatrics (11.3%; 95% CI 9.6% to 13.2%). The less popular medical disciplines of specialty included public health, orthopaedics, ophthalmology, family medicine, pathology, anaesthesiology, dermatology, otolaryngology, psychiatry and emergency medicine. The reasons for the selection of a medical discipline for specialty related to mentor and peer influences, prospect for economic gains, personal factors, long-term career interests and goals and discipline-specific factors.ConclusionSurgery is the most preferred career aspiration for medical students in SSA, followed by internal medicine. The choices do not necessarily match the disease burden on the continent and medical schools should consider strengthening career counselling and mentoring in their curriculum.PROSPERO registration numberCRD42021260501.

In Uganda, the effect of the COVID-19 pandemic on substance and drug use at the national level has not been studied. Our study evaluated the effect of the COVID-19 pandemic on the frequency of smoking, alcohol consumption, and substance use among Ugandans aged ≥ 15 years based on a large, nationally representative survey. This quasi-experimental study used the Uganda National Household Survey data collected between June 2019 and November 2020, with the COVID-19 pandemic as the primary exposure and outcomes as smoking, alcohol consumption, and substance use frequency before and during the COVID-19 pandemic, measured on an ordered scale (none, less than daily, and daily). We used propensity score weighting to balance the exposed and unexposed groups, and analyzed the effect of COVID-19 on the outcomes using ordered logistic regression, adjusting for the propensity score weights. Sub-group analysis was conducted based on sex, residence, and age groups. We analyzed data on 34,312 participants (18,270 exposed vs. 16,042 unexposed) aged ≥ 15 years, with 53.8% male and 54.3% aged 25–59 years. Frequency of smoking (weighted proportional odds ratio [pOR] 0.13, 95% confidence interval [CI] 0.07–0.25), alcohol consumption (weighted pOR 0.36, 95% CI 0.26–0.48), and substance use (weighted pOR 0.04, 95% CI 0.01–0.29) were significantly lower during the COVID-19 pandemic compared to the pre-pandemic levels. In sex-stratified analysis, smoking, alcohol consumption, and substance use were lower during the COVID-19 pandemic compared to the pre-pandemic period. In rural areas, substance use was higher, but smoking and alcohol consumption were lower. In urban settings, the reductions in smoking, alcohol consumption, and substance use remained consistent with the pre-pandemic levels. In Uganda, the frequency of smoking, alcohol consumption, and substance use during the COVID-19 pandemic was lower compared to the pre-pandemic levels. Future studies should examine if the reductions were sustained after the pandemic and whether modified restrictions can reduce alcohol consumption.