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This study aimed to estimate socio-demographic inequalities in HIV testing and prevalence among adults aged 50+ years, living in Ifakara town, Tanzania, in 2013 Like in other African countries, most HIV research in Tanzania focuses on adults 15-49 years, ignoring persons aged 50 years and above. In Tanzania, the HIV testing rate (ever tested) for 15 - 49 year olds has increased from 37% to 62% for women and 27% to 47% for men between 2008 and 2012. Limited data is available on HIV testing and prevalence among older adults specifically. Some studies in Sub-Saharan Africa have, however, reported a high HIV prevalence among older people. This is a cross-sectional study using data from the baseline measurement of the Ifakara MZIMA cohort study conducted in 2012/13. Consenting participants were interviewed and tested for HIV. Information on prior testing behaviour, age, marital status, occupation, gender, ethnicity, religion, education (PROGRESS framework indicators) was retrieved from the interviewer administered questionnaires. Multivariable logistic regression analysis was used to establish associations between HIV testing and prevalence with the socio-demographic indicators. Among the 1,643 adults 50+ years included in the study, HIV prevalence and the HIV testing rate (ever tested) were 6% and 11.4% respectively. Multivariable analysis showed that the HIV testing rate was lower for older people (OR=0.19 (95%CI 0.09-0.41 for 75+ versus 50-54); those separated/divorced/widowed had higher odds of testing than those married (OR=1.46; 1.02-2.10); and “other Christians” had a higher odds than Muslims (OR=1.95; 1.06-3.58). With respect to HIV prevalence, it is higher for older people (OR=0.27; 0.11-0.66 for 75+ versus 50-54); and Catholics have a lower odds compared to Muslims (OR=0.54; 0.34-0.85). These results are valuable as they provide insight into the sociodemographic inequalities among older adults. The high HIV prevalence among this group and the low HIV testing behaviour call for more efforts on HIV prevention, treatment and care. Also the older adults should be included in the national surveillance systems like DHS and THMIS as they are also the HIV risk population. Furthermore, the government should establish elder friendly services and strengthening the capacity of the health system to deliver quality services for HIV and other diseases in the country. Additionally, the findings of this study also warrant further research on the HIV prevalence and testing behaviour of older adults, including studies on the sexual behaviour of older adults.

Socio-Demographic Inequalities in HIV Testing and Prevalence Among Older Adults in Rural Tanzania, 2013