We conducted a cohort design study to participants enrolled in the INTE-AFRICA trial from 15 health facilities in Dar es Salam and Pwani regions between May 2020 to April 2021. Eligible participants were adults attending diabetes and hypertension clinics. Retention was defined as participants with at least two medical visit dates at least 90 days apart in 12 months.  The final sample size had a power of 100% to detect a difference of 10% to 30% retention between the two arms with a 95% confidence interval. Data were extracted from the INTE-Africa electronic database. Proportions were compared using χ2 tests. Prevalence and rate ratios were obtained using Generalised Linear Models.









