Objective:
Our objective was to assess the prevalence and patterns of mobility among people living with HIV (PWH) in Tennessee, and its impact on HIV care outcomes.
Design:
Retrospective cohort study
Methods:
We combined residential address and HIV surveillance data from PWH in Tennessee from 2016 to 2018. Using Poisson regression, we estimated associations between in-state mobility (change in address or total miles moved) in one year and outcomes in the subsequent year; retention: having two CD4/HIV RNA values (labs) in a calendar year at least three months apart, loss to follow-up (LTFU): having labs at baseline but not the subsequent year, and viral suppression: HIV RNA <200 copies/mL. We applied a kernel density estimator to origin-destination address lines to visualize mobility patterns across demographic subgroups.
Results:
Among 17,428 PWH (median age 45 years [IQR 34, 53]), 6,564 (38%) had ≥1 move. Median miles moved was 8.9 (IQR 2.6, 143.4)). We observed in-state movement between major cities (Chattanooga, Knoxville, Memphis and Nashville) and out-of-state movement to and from Georgia and Florida. Having ≥1 in-state moves was associated with a decreased likelihood of retention (adjusted relative risk [aRR]=0.91; 95%CI 0.88–0.95), and an increased risk of LTFU (aRR=1·17; 95%CI 1·04–1·31 2–3 moves vs. none). Greater distance moved in-state was associated with decreased retention and increased LTFU (aRR=0.53; 95%CI 0.49–0.58, aRR=2.52; 95%CI 2.25–2.83 respectively for 1000 vs. 0 miles). There was no association between mobility and viral suppression.
Conclusions:
Mobility is common among PWH in Tennessee and is associated with initial poor engagement in HIV care.