Brief Article
Copyright copy;2010 Baishideng Publishing Group Co.
World J Gastroenterol. Sep 7, 2010; 16(33): 4221-4226
Published online Sep 7, 2010. doi: 10.3748/wjg.v16.i33.4221
Table 1 Characteristics of students with or without irritable bowel syndrome n (%)
Total (n = 2126)IBS (n = 167)Non-IBS (n = 1959)χ2P value
Sex
Male917 (43.1)60 (6.5)857 (93.5)3.8350.05
Female1209 (56.9)107 (8.9)1102 (91.1)
Branch of learning
Liberal arts701 (33.0)43 (6.1)658 (93.9)5.1190.077
Science697 (32.8)56 (8.0)641 (92.0)
Medicine728 (34.2)68 (9.3)660 (90.7)
Schooling level
Lower1425 (67.0)117 (8.2)1308 (91.8)0.7540.385
Upper701 (33.0)50 (7.1)651 (92.9)
Table 2 Dietary and lifestyle factors in irritable bowel syndrome and non-irritable bowel syndrome groups n (%)
VariablesCategoriesTotal (n = 2126)IBS (n = 167)Non-IBS (n = 1959)χ2P value
Dairy produce
Almost everyday676 (31.8)57 (8.4)619 (91.6)0.4560.796
Sometimes1305 (61.4)99 (7.6)1206 (92.4)
Almost never145 (6.8)11 (7.6)134 (92.4)
Cold dishPercentage per day
< 25%1650 (77.6)132 (8.0)1518 (92.0)0.5120.774
25%-75%468 (22.0)34 (7.3)434 (92.7)
> 75%8 (0.4)1 (12.5)7 (87.5)
Alcohol
No1912 (89.9)149 (7.8)1763 (92.2)0.1020.750
Yes214 (10.1)18 (8.4)196 (91.6)
Exercise frequency9.8230.007
Almost everyday160 (7.5)11 (6.9)149 (93.1)0.1210.728
Sometimes1039 (48.9)64 (6.2)975 (93.8)1.4790.224
Almost never927 (43.6)92 (9.9)835 (90.1)9.5050.002
Table 3 Univariate analysis of some factors in irritable bowel syndrome and non-irritable bowel syndrome groups n (%)
FactorsCategoriesTotal (n = 1902)IBS (n = 167)Non-IBS (n = 1735)χ2P value
Anxiety60.4310.000
0-71496 (78.7)103 (6.9)1393 (93.1)2.8640.091
8-10253 (13.3)25 (9.9)228 (90.1)61.0530.000
≥ 11153 (8.0)39 (25.5)114 (74.5)17.4930.000
Depression35.5970.000
0-71357 (71.3)94 (6.9)1263 (93.1)2.5490.110
8-10326 (17.2)31 (9.5)295 (90.5)35.8940.000
≥ 11219 (11.5)42 (19.2)177 (80.8)10.5570.001
Negative life events in childhoodNormal967 (50.8)99 (10.2)868 (89.8)6.2820.987
Mild626 (32.9)48 (7.7)578 (92.3)
Moderate273 (14.4)19 (7.0)254 (93.0)
Severe36 (1.9)1 (2.8)35 (97.2)
Table 4 Evaluation of risk factors for irritable bowel syndrome by multivariate logistic regression analysis
VariablesβStandard errorWaldOdds ratio95% CI
P value
LowerUpper
Anxiety0.1060.02715.3831.1121.0541.1720.031
Depression0.0280.0290.9511.0280.9721.0880.329