Cohort Profile: The Nigerian HIV Geriatric Cohort Study
Abstract Background: The Nigerian HIV Geriatric Cohort (NHGC) is a longitudinal cohort setup to learn how elderly people living with HIV (EPLHIV) in Nigeria fare, despite not being prioritized by the national treatment program, and to deepen knowledge for their differentiated care and achieve better outcomes. In this paper, we describe data collected on sociodemographic and clinical data from EPLHIV from the inception of Nigeria’s national HIV program to 2018. Methods: Patient-level data spanning the period 2004 to 2018, obtained from comprehensive HIV treatment hospitals, that are supported by four major PEPFAR-implementing partners in Nigeria were used. These 4 entities collaborated as member organizations of the Nigeria Implementation Science Alliance. We defined elderly as those aged 50 years and above. From deidentified treatment records, demographic and clinical data of EPLHIV ≥50-year-old at ART initiation during the review period was extracted, merged into a single REDcap® database, and described using STATA 13. Results: A total of 101,652 unique EPLHIV entries were analysed. This cohort’s data was of 53,608(52.7%) women, 51,037(71.4%) of EPLHIV identified as married and 33,446(51.1%) unemployed. Mean age was 57.1 years (SD=6.9) with average duration on ART as 4.6 years (SD=3.5). ART profile showed that 88,792(95.7%) were on 1st-line and 55,905 (64.9%) were on TDF-based regimens. Mean-body mass index (BMI) was 23.0 kg/m2 (SD=5.4 kg/m2) with 56,010(55.1%), 19,619(19.3%) and 8844(8.7%) showing normal (18.5kg/m2–24.9kg/m2), overweight (BMI 25 -<30kg/m2) and obese (BMI ≥30kg/m2) ranges respectively. prevalence of hypertension (systolic-BP >140mmHg or diastolic-BP >90mmHg) was 21,550(21.2%) EPLHIV records. Mean CD4 count was 420cells/μL (SD=285cells/μL) and 83,660(82.3%) had a viral load result showing <1000copies/ml. As for treatment outcomes, available records showed that 54.1% were active-in-treatment, 28.4% were lost-to-follow-up and 6.8% died. Poor population death records and aversion to autopsies makes it almost impossible to estimate AIDS-related deaths. Conclusions: This cohort describes the clinical and non-clinical profile of EPLHIV in Nigeria. We are following up the cohort to design and implement intervention programs, develop prognostic models to achieve better care outcomes for EPLHIV. This cohort would provide vital information for stakeholders in HIV prevention, care and treatment to understand the characteristics of EPLHIV.