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Mean of the main study variables under no intervention when outcome is mortality: observed (solid line) and estimated via the parametric g-formula (dotted line). HIV-CAUSAL Collaboration, Jan 1, 1996 – Dec 31, 1999. (a) Cumulative incidence of death; (b) Cumulative incidence of AIDS; (c) Mean proportion on treatment; (d) Mean CD4 count, natural log scale; (e) Mean HIV RNA, natural log scale.
