Figure 2. Gestational Age-Specific Survival following Live Birth by Study Type.
Data are shown for population-based cohorts (gray hues), center-based cohorts reporting survival for live births (blue hues) and center-based cohorts reporting survival for infants admitted to the NICU (orange hues). Characteristics of the data sources are reported in Table 1. Whisker bars indicate 95% confidence intervals calculated with the Clopper-Pearson method. *Estimates not reported by the study.