Table 2.

Incidence of pneumonia stratified by sex and age between predialysis chronic kidney disease group and non-chronic kidney disease group.

	Non-chronic kidney disease				Predialysis chronic kidney disease
Variable	N	Event	Person- years	Incidence†	N	Event	Person- years	Incidence†	IRR#	(95% CI)
All	18807	2113	126622	16.7	18807	2821	114713	24.6	1.47	(1.40, 1.55)
Sex
Female	7655	748	54399	13.8	7655	1035	48472	21.4	1.55	(1.43, 1.68)
Male	11152	1365	72223	18.9	11152	1786	66241	27.0	1.43	(1.34, 1.52)
Age group (years)
20-39	5367	292	43624	6.69	5367	473	41350	11.4	1.71	(1.53, 1.90)
40-64	6243	569	42385	13.4	6243	794	38994	20.4	1.52	(1.38, 1.66)
65-84	7197	1252	40613	30.8	7197	1554	34369	45.2	1.47	(1.36, 1.58)

^†Incidence: per 1, 000 person-years.

^#IRR (incidence rate ratio): predialysis chronic kidney disease vs. non-chronic kidney disease (95% confidence interval)