TABLE 2.

Incidence Rate (Per 100,000 Person-Years) of ALRI and Radiographically Confirmed Pneumonia, Stratified by Province, Sex and Age, in Hospitalized Children <5 years, Sa Kaeo and Nakhon Phanom Provinces, Thailand, 2005–2010

	ALRI (n = 28,543)				Radiographically Confirmed* (n = 6645)
	IR	95% CI	IRR	95% CI	IR	95% CI	IRR	95% CI
Overall	5772	5707–5837			1800	1774–1827
Girls	4833	4748–4919	1.0		1492	1458–1525	1.0
Boys	6671	6574–6769	1.38	1.35–1.41	2096	2056–2136	1.41	1.34–1.48
<6 months	5561	5352–5770	1.0		2059	1963–2155	1.0
6–23 months	9795	9643–9947	1.76	1.69–1.84	3230	3168–3293	1.57	1.45–1.7
24–59 months	3848	3779–3916	0.69	0.66–0.72	1064	1038–1091	0.52	0.48–0.56
Sa Kaeo	5303	5204–5401	1.0		1664	1626–1701	1.0
Nakhon Phanom	6086	6000–6172	1.15	1.12–1.18	1888	1852–1924	1.13	1.08–1.19
2005	5716	5563–5869	1.0		1720	1660–1779	1.0
2006	5609	5453–5765	0.98	0.94–1.02	1705	1643–1766	0.99	0.91–1.08
2007	5590	5432–5748	0.98	0.94–1.02	1683	1615–1751	0.98	0.9–1.07
2008	5943	5779–6106	1.04	1–1.08	1875	1815–1936	1.09	1.01–1.18
2009	5091	4939–5243	0.89	0.85–0.93	1506	1446–1565	0.88	0.8–0.95
2010	6691	6519–6863	1.17	1.13–1.22	2327	2251–2403	1.35	1.25–1.46

^*Applying proportion of CXRs with evidence of pneumonia to the total number of CXRs performed.