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Background This study explored disparities in characteristics and mortalities among four major transmission groups on antiretroviral therapy in northwest China as well as the survival impact of each transmission route. Methods We first examined disparities in demographics and clinical characteristics of the four transmission populations. Kaplan Meier analysis was subsequently conducted to compare survival rates among all groups. At last, Cox proportional hazards regression model was employed to analyze the survival impact of a transmission route among seven main categories of survival factors associated with all-cause mortalities. Results Survival analysis showed significant differences in all-cause, AIDS- and non-AIDS-related deaths among four HIV populations (all  P  &lt; 0.05). Using homosexuals as the reference, Cox proportional hazards model further revealed that the risk of all-cause death for blood and plasma donors was significantly higher than that of the reference (aHR: 5.21, 95%CI: 1.54–17.67); the risk of non-AIDS-related death for heterosexuals (aHR: 2.07, 95%CI: 1.01–4.20) and that for blood and plasma donors (aHR: 19.81, 95%CI: 5.62–69.89) were both significantly higher than that of the reference. Conclusions Significant disparities were found in characteristics and mortalities among the four transmission groups where mortality disparities were mainly due to non-AIDS-related death. Suggestions are provided for each group to improve their survivorship.

bmc infectious diseases

A comparative analysis on characteristics and mortalities of four key transmission populations on antiretroviral therapy: a retrospective cohort study in Northwest China