Browsing by Author "Yaya, Sanni"

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    Individual, community and region level predictors of insecticide-treated net use among women in Uganda: a multilevel analysis
    (Malaria journal, 2020) Ameyaw, Edward Kwabena; Olushola, Yusuf Kareem; Yaya, Sanni
    Background Use of insecticide-treated net (ITN) has been identified by the World Health Organization as an effective approach for malaria prevention. The government of Uganda has instituted measures to enhance ITN supply over the past decade, however, the country ranks third towards the global malaria burden. As a result, this study investigated how individual, community and region level factors affect ITN use among women of reproductive age in Uganda. Methods The 2018–2019 Malaria Indicator Survey of Uganda involving 7798 women aged 15–49 was utilized. The descriptive summaries of ITN use were analysed by individual, community and region level factors. Based on the hierarchical nature of the data, four distinct binomial multilevel logistic regression models were fitted using the MLwiN 3.05 module in Stata. The parameters were estimated using the Markov Chain Monte Carlo (MCMC) estimation procedure and Bayesian Deviance Information Criterion was used to identify the model with a better fit. Results The proportion of women who use ITN was 78.2% (n = 6097). Poor household wealth status [aOR = 1.66, Crl = 1.55–1.80], knowing that sleeping under ITN prevents malaria [aOR = 1.11, Crl = 1.05–1.24] and that destroying mosquito breeding sites can prevent malaria [aOR = 1.85, Crl = 1.75–1.98] were associated with higher odds of ITN use. ITN use attributable to regional and community level random effects was 39.1% and 45.2%, respectively. Conclusion The study has illustrated that ITN policies and interventions in Uganda need to be sensitive to community and region level factors that affect usage. Also, strategies to enhance women’s knowledge on malaria prevention is indispensable in improving ITN use.
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    Predictive value of CD4 cell count nadir on long-term mortality in HIV-positive patients in Uganda
    (HIV/AIDS – Research and Palliative Care, 2012) Bray, Sarah; Gedeon, Jillian; Hadi, Ahsan ard J Mills; Kotb, Ahmed; Rahman, Tarun; Sarwar, Elaha; Savelyeva, Anna; Sévigny, Marika; Bakanda, Celestin; Birungi, Josephine; Chan, Keith; Yaya, Sanni; Deonandan, Raywat; Mills, Edward J.
    Although international guidelines recommend initiating antiretroviral therapy (ART) when a patient’s CD4 cell count is #350 cells/μL, most patients in resource-limited settings present with much lower CD4 cell counts. The lowest level that their CD4 cell count reaches, the nadir, may have long-term consequences in terms of mortality. We examined this health state in a large cohort of HIV+ patients in Uganda. Design: This was an observational study of HIV patients in Uganda aged 14 years or older, who were enrolled in 10 major clinics across Uganda. Methods: We assessed the CD4 nadir of patients, using their CD4 cell count at initiation of ART, stratified into categories (,50, 50–99, 100–149, 150–249, 250+ cells/μL). We constructed Kaplan–Meier curves to assess the differences in survivorship for patients left-censored at 1 year and 2 years after treatment initiation. We used Cox proportional hazards regression to model the associations between CD4 nadir and mortality. We adjusted mortality for loss-to-follow-up. Results: Of 22,315 patients, 20,129 patients had greater than 1 year of treatment follow-up. Among these patients, 327 (1.6%) died and 444 (2.2%) were lost to follow-up. After left-censoring at one year, relative to lowest CD4 strata, patients with higher CD4 counts had significantly lower rates of mortality (CD4 150–249, hazard ratio [HR] 0.60, 95% confidence interval [CI]: 0.45–0.82, P = 0.001; 250+, HR 0.66, 95% CI, 0.44–1.00, P = −0.05). Male sex, older age, and duration of time on ART were independently associated with mortality. When left-censoring at 2 years, CD4 nadir was no longer statistically significantly associated with mortality. Conclusion: After surviving for 1 year on ART, a CD4 nadir was strongly predictive of longer-term mortality among patients in Uganda. This should argue for efforts to increase engagement with patients to ensure a higher CD4 nadir at initiation of treatment.
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    The prognostic value of baseline CD4R cell count beyond 6 months of antiretroviral therapy in HIV-positive patients in a resource-limited setting
    (Aids, 2012) Mills, Edward J.; Bakanda, Celestin; Birungi, Josephine; Yaya, Sanni; Ford, Nathan
    The risk of death is highest in the first few months after initiation of antiretroviral therapy (ART). We examined whether initial CD4þ cell count maintains a strong prognostic value among patients with at least 6 months follow-up after the initiation of ART. Design: Observational study of HIV patients in Uganda aged 14 years or older enrolled in 10 clinics across Uganda. Methods: Baseline CD4þ cell count of patients with more than 6 months of follow-up were stratified into categories (<50, 50–99, 100–149, 150–249, >250 cells/ml). A Kaplan–Meier survival analysis and Cox proportional hazards regression was used to model the associations between baseline CD4þ cell count and mortality. Results: Of 22 315 patients, 20 730 (92.8%) had more than 6 months of follow-up. Six hundred and eleven (2.9%) patients died during follow-up and 737 (3.6%) were lost to follow-up. Relative to a baseline CD4þ cell counts of less than 50 cells/ml, the adjusted hazard ratios for death were 0.83 [95% confidence interval (CI) 0.67–1.02], 0.71 (95% CI 0.57–0.88), 0.52 (95% CI 0.42–0.64), and 0.55 (95% CI 0.42–0.70) favouring those with baseline CD4þ cell counts of 50–99, 100–149, 150–249, and at least 250 cells/ml, respectively. Differing ages and male sex increased the likelihood of mortality. Conclusion: Among patients with more than 6 months of follow-up after initiation of ART, baseline CD4þ cell count at initiation still has important prognostic value. This suggests that active engagement and earlier treatment initiation is important for longterm survival.