The moderator effect of retention in care on late presenters in HIV patients has not been well evaluated. A nationwide cohort study focusing on HIV-infected patients with new engagement in care was conducted by using the Taiwan National Health Insurance Research Database. Retention in care was defined based on the healthcare utilization in the first year after engaging in HIV care. Then, the impact of late presentation, retention in care, and their interaction on the risk of subsequent hospitalizations due to opportunistic infections (OIs-hospitalizations) in the second year were examined. More than half (59.38%) of the total patients (n = 9112) were retained in care in the first year, 8.63% were late presenters, and 110 (1.21%) patients had subsequent hospitalization in the second year. Late presentation and non-retention were independent predictors of OIs-hospitalizations in the second year (OR: 2.58 and OR: 3.27, respectively) and the interaction between them was statistically significant (non-retention in care × late presentation, OR: 3.82). This study showed that retention in care in the first year is a moderator providing a stronger protective effect for late presenters than early presenters. Our findings call for policymakers to develop different strategies for early or late presenters.
Keywords: Delayed diagnosis; late presentation; linkage to care; opportunistic infections; retention.