Figure 1.

Selection of children aged 0-59 months from hospital-based studies included in the external application of the Respiratory Index of Severity in Children (RISC), RISC-Malawi, and Pneumonia Etiology Research for Child Health (PERCH) scores. ^aThe sum of patients included in the 4 individual validation cohorts does not total 41 365 as the validation each of the 4 scores required that every component of the score be available within the data set. ^bExcluding the parent data set from which the RISC-Malawi score was derived. ^cExcluding 610 children less than 2 months of age. ^dExcluding 105 children less than 2 months of age.