Risk factors and outcomes of HIV-associated stroke in Zambia

Abstract

Objective: To compare risk factors and clinical outcomes between people with HIV (PWH) and HIV-uninfected (HIV-) adults with stroke hospitalized in Zambia.

Methods: We retrospectively reviewed charts of all adults admitted to the University Teaching Hospital in Lusaka, Zambia with a clinical diagnosis of stroke between October 2018 and March 2019. Standardized data collection instruments were used to collect demographic, clinical, laboratory and imaging results. Comparison between individuals with and without HIV infection was made using t tests for continuous parametric variables, Wilcoxon rank-sum tests for continuous nonparametric variables, and chi-square analyses for categorical variables.

Results: Two hundred and seventy-two adults with stroke were admitted of whom 58 (21%) were PWH. Compared with HIV- participants, PWH were younger [(48 ± 14) years versus 62 ± 18) years, P < 0.001]. PWH were less likely to have hypertension (65 versus 83%, P = 0.003) and more likely to have no traditional cerebrovascular risk factors (34 versus 15%, P = 0.01). Deep vein thrombosis (DVT) (4 versus 1%, P = 0.04) was more common during hospitalization amongst PWH but there was no difference in in-hospital mortality (21 versus 23%, P = 0.65). Among PWH with stroke, factors associated with in-hospital mortality were Glasgow Coma Scale (GCS) on admission (7 versus 10, P = 0.046), hypertension (92 versus 59%, P = 0.04) and fever (58 versus 13%, P = 0.003).

Conclusion: This Zambian cohort of PWH and stroke is notable for being significantly younger with fewer traditional stroke risk factors but higher rates of DVT than their HIV-uninfected counterparts. GCS on admission, hypertension and fever were associated with in-hospital mortality.