Fig. 1.

Point estimates^a and Monte Carlo 95% confidence intervals (CIs) for the models developed from stratifying countries into five strata^b based on the variables listed

DTP3, third dose of diphtheria–tetanus–pertussis vaccine; GNI, gross national income; log, logarithm; WHO, World Health Organization.

^a The vertical corresponds to the WHO estimate.

^b Cut-off values for each stratum are presented in Table 1.

^{c “}WHO” refers to the stratification method used by the WHO.

^{d “}WHO alternative” refers to the WHO stratification method with a slight adjustment (Table 1).

^e The model average estimate averages across all the models here except for the WHO model.