Fig. 5.
Use of norethisterone enanthate versus non-use of hormonal contraception and HIV acquisition, among six studies considered informative but with important limitations.
Error bars show 95% confidence intervals. Studies arranged in order of decreasing magnitude of risk estimate. Graph does not display estimates from marginal structural models. adjIRR, adjusted incidence risk ratio; adjHR, adjusted hazard ratio. ^Unpublished estimates from a subanalysis of Morrison et al.[26] meta-analysis, restricted to pooled analysis using databases not previously used to publish estimates on hormonal contraceptive methods and HIV acquisition risk. §Unpublished estimates disaggregated by injectable type.