Table 2.

Prevalence of hypoxemia (resting room air SpO₂ <90%) at Kapiri District Hospital. P-value represents probability of obtaining the observed value due to random chance under the null hypothesis that prevalence of hypoxemia is less than 1%, using a one-sided, one-sample test of proportions at α = 0.05

Age group	Prevalence of hypoxemia (%)	95% confidence interval of proportion	P-value
All ages	7.8	(3.8, 14.6)	<0.0001
<5 years	7.4	(1.1, 13.5)	<0.0001
5–17 years	0.0	(0.0, 0.0)	0.652
≥18 years	9.2	(3.8, 14.5)	<0.001