Figure 1From: Reduced referral and case fatality rates for severe symptomatic hyperlactataemia in a South African public sector antiretroviral programme: a retrospective observational studyReferral rates for severe symptomatic hyperlactataemia. The referral rates from 2003 to 2008 are shown with 95% confidence intervals. The empty circles demonstrate referral rates using cumulative antiretroviral therapy (ART) exposure of all adult patients at referral clinics as the denominator. The solid squares demonstrate referral rates using cumulative adult ART exposure of between 6 and 18 months duration as the denominator. SHL = symptomatic hyperlactataemia; py = patient years, ART = antiretroviral therapyBack to article page