Prevalence of Irritable Bowel Syndrome Subtypes in East Asia
| Rome III | All | Sex | Age group | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Males (n = 1955) |
Females (n = 1955) |
χ2 ( |
Twenties (n = 877) |
Thirties (n = 687) |
Forties (n = 782) |
Fifties (n = 782) |
Sixties (n = 782) |
χ2 ( |
|||||
| IBS | 492 12.6 (11.6-13.7) |
272 13.9 (12.5-15.5) |
220 11.3 (9.9-12.7) |
6.29 (1) |
0.012 | 110 12.5 (10.5-14.9) |
86 12.5 (10.3-15.2) |
123 15.7 (13.4-18.5) |
103 13.2 (11.0-15.7) |
70 9.0 (7.1-11.2) |
16.66 (4) |
< 0.002 | |
| % | |||||||||||||
| IBS-D | 108 2.8 (2.3-3.3) |
73 3.7 (3.0-4.7) |
35 1.8 (1.3-2.5) |
13.75 (1) |
< 0.001 | 20 2.3 (1.5-3.5) |
15 2.2 (1.3-3.6) |
34 4.4 (3.1-6.0) |
25 3.2 (2.2-4.7) |
14 1.8 (1.1-3.0) |
12.24 (4) |
0.016 | |
| % | |||||||||||||
| IBS-C | 81 2.1 (1.7-2.6) |
34 1.7 (1.4-2.4) |
47 2.4 (1.8-3.2) |
2.13 (1) |
0.144 | 12 1.4 (0.8-2.4) |
10 1.5 (0.8-2.7) |
19 2.2 (1.6-3.8) |
18 2.3 (1.5-3.6) |
22 2.8 (1.9-4.2) |
6.24 (4) |
0.182 | |
| % | |||||||||||||
| IBS-M | 235 6.0 (5.3-6.8) |
128 6.6 (5.5-7.7) |
107 5.5 (4.6-6.6) |
2.00 (1) |
0.158 | 70 8.0 (6.4-10.0) |
52 7.6 (5.8-9.8) |
53 6.8 (5.2-8.8) |
41 5.2 (3.9-7.0) |
19 2.4 (1.6-3.8) |
28.37 (4) |
< 0.001 | |
| % | |||||||||||||
| IBS-U | 68 1.7 (1.4-2.2) |
37 1.9 (1.4-2.6) |
31 1.6 (1.1-2.2) |
0.54 (1) |
0.463 | 8 0.9 (0.5-1.8) |
9 1.3 (0.7-2.5) |
17 2.2 (1.4-3.5) |
19 2.4 (1.6-3.8) |
15 1.9 (1.2-3.1) |
7.44 (4) |
0.114 | |
| % | |||||||||||||
aThe observed frequency is significantly higher than the expected frequency at the 1% level.
bThe observed frequency is significantly lower than the expected frequency at the 1% level.
cThe observed frequency is significantly lower than the expected frequency at the 5% level.
IBS, irritable bowel syndrome; IBS-D, irritable bowel syndrome with diarrhea; IBS-C, irritable bowel syndrome with constipation; IBS-M, mixed irritable bowel syndrome; IBS-U, unclassified irritable bowel syndrome.
The 95% CI for the prevalence is in parentheses.