Epidemiological trends and geographic variation in hospital admissions for diverticulitis in the United States

Table 3 Age- and region-specific time trends in rates of hospitalization for colonic diverticulitis

	Calendar year rates of hospitalization for diverticulitis (per 100 000)
	1998	1999	2000	2001	2002	2003	2004	2005
15-24 yr
N	1.4	1.8	1.6	1.8	2.2	2.7	2.9	2.9
M	0.6	0.9	1.2	1.7	1.9	2.1	2.1	2.7
S	1.0	0.9	1.2	1.8	2.1	2.4	2.6	2.3
W	0.9	1.2	1.6	1.2	1.4	1.9	2.2	2.0
25-44 yr
N	33.5	39.6	43.4	44.3	55.0	54.2	58.3	65.3
M	24.8	27.4	31.4	37.2	41.9	42.5	44.6	48.2
S	24.9	28.5	33.8	36.7	41.6	43.1	43.3	43.6
W	17.0	20.1	26.3	24.7	27.2	28.2	29.5	26.6
45-64 yr
N	106	114	125	126	138	137	147	155
M	85	86	102	108	119	123	115	130
S	105	107	111	113	122	122	119	128
W	66.8	67.3	78.2	73.3	83.1	81.4	89.7	87.6
65+ yr
N	245	256	275	260	283	276	267	291
M	271	254	265	298	299	299	285	296
S	304	277	284	302	288	292	290	286
W	206	184	200	199	200	198	196	203

N: Northeast; M: Midwest; S: South; W: West.