Fig. 3: Survival analysis by study arm.

Kaplan Meier analysis (A) and Cox proportional hazards regression with backward selection of variables, unadjusted (B) or adjusted for age and sex (C), according to study arm (INT vs CON) after excluding participants who died during the three-year follow-up. Numbers (percentages) of deaths, number of participants at risk, and HRs (95% CI) for mortality are shown for each group. INT intervention (green lines), CON control (red lines), HR hazard ratio, CI confidence interval.