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Attributes of HIV infection over decades (1982-2018): A systematic review and meta-analysis.

Understanding the risk factors for HIV infection is the foundation of successful preventive strategies, which must bundle sociocultural, behavioural and biomedical interventions to halt disease transmission. We aimed in this study to provide a pooled estimation of HIV risk factors and trace changes across decades in order to drive consensus and accurate assessment of disease transmission risk. We comprehensively searched PubMed, ISI Web of Knowledge, Medline, EMBASE, ScienceDirect, Ovid, EBSCO, Google Scholar and the Egyptian Universities Library Consortium from October-December 2018. Two independent reviewers extracted data from eligible studies. Funnel plots were inspected to identify publication bias. Heterogeneity across studies was checked using the Q and I2 statistics. The results were reported based on the pooled odds ratio (pOR) with 95% CI using a random-effects model. Meta-analysis of HIV risk factors revealed a superior role for risky sexual practices (unprotected vaginal/anal sex), injecting drug use (IDU), sharing needles, sexually transmitted infections (STIs), child sexual abuse, and vertical transmissions. Trends across decades (1982 - 1999 and 2000 - 2018 respectively) showed rising evidence for prostitution [pOR (95% CI)= 2.3 (1.12 - 4.68) vs 2.69 (1.67 - 4.32)] and men who have sex with men (MSM) [pOR (95% CI)= 2.28 (1.64 - 3.17) vs 3.67 (1.88 - 7.17)], while transmission through IDU [pOR (95% CI)= 3.42 (2.28 - 5.12) vs 2.16 (1.74 - 2.70)], alcoholism [pOR (95% CI)= 2.35 (0.73 - 7.59) vs 1.71(1.08 - 2.72)], and sharing syringes [pOR (95% CI)= 6.10 (2.57 - 14.5) vs 2.70 (2.01 - 6.35)] showed notable decline. Harm reduction programs and condom use have been recognized as chief HIV prevention strategies, while male circumcision contributed a partial role. Collectively, sexual risk factors continue to be a key driver of the global HIV epidemic. Persistent and emerging risk factors identified in our analysis should constitute the primary targets of HIV prevention programmes to accelerate efforts towards HIV elimination.