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

Table 1 Demographics of admissions for acute colonic diverticulitis

	Geographic region (%)
	Northeast	Midwest	South	West
Age group
15-24 yr	< 1	< 1	< 1	< 1
25-44 yr	17	15	15	16
45-64 yr	38	35	36	37
≥ 65 yr	44	50	49	46
Sex
Male	42	40	39	43
Female	58	60	61	57
Race1
Non-hispanic white	86	93	80	76
Black	6	5	9	4
Hispanic	6	< 1	9	15
Other	2	2	2	3

¹Based on admissions with race data which was missing in 25%.

Table 2 Age- and sex-specific time trends in hospitalization rates for colonic diverticulitis

	Calendar year hospitalization rates for diverticulitis (per 100 000)
	1998	1999	2000	2001	2002	2003	2004	2005
15-24 yr
M	1.4	1.7	1.8	2.2	2.6	3.2	3.4	3.2
F	0.5	0.6	0.9	1.1	1.3	1.3	1.4	1.6
B	1.0	1.1	1.3	1.6	1.9	2.3	2.5	2.4
25-44 yr
M	33.4	38.5	44.1	47.3	54.4	55.0	55.7	57.6
F	16.6	18.9	23.3	24.2	28.1	28.5	30.8	31.7
B	24.7	28.7	33.7	35.7	41.2	41.9	43.4	44.8
45-64 yr
M	84.4	90.1	98.9	97.9	107	109	108	117
F	99.7	99.3	110	114	125	122	126	132
B	92.3	94.9	105	106	116	116	117	125
65+ yr
M	181	178	180	189	187	187	182	191
F	322	298	317	329	331	331	323	330
B	264	249	261	271	272	271	265	272

M: Males; F: Females; B: Both sexes.

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.