Fig. 2
Prevalence of hypoxemia (resting room air SpO2 < 90%) at Kapiri District Hospital by age group with 95% confidence intervals of proportions. *Denotes statistical significance for prevalence ≥1% via one-sided, one-sample test of proportion at α = 0.05. **Denotes statistical significance for difference in distribution of oxygen saturation levels among the three groups via Kruskal-Wallis equality-of-populations rank test at α = 0.05