Outcomes associated with each risk factor, studies from which RRs were extracted, and procedures for estimating RRs by age group.

aRRs apply to mortality but not to incidence and is included because of the benefits of lower blood pressure for reduced heart failure mortality.bThis residual category contains a number of ICD codes. The proportion of deaths from the constituent diseases is likely to vary across world regions and even across cohorts in the same meta-analysis.cA quadratic age model was used instead of a log-linear age model as this fit the data better.