Table 1.
Distribution of BMI at symptom severity and QOL based on several demographic and clinical features (n=366)
| N | BMI | Symptom severity | QOL | ||
| Physical health | Mental health | ||||
| Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | ||
| Gender | |||||
| Male | 114 | 24.30 (3.48) | 280.27 (78.23) | 42.21 (7.87)* | 39.41 (12.76) |
| Female | 252 | 23.71 (5.84) | 292.10 (76.14) | 40.21 (9.16) | 39.23 (11.84) |
| Age | |||||
| 18–49 | 264 | 23.36 (5.14)* | 293.39 (77.52)* | 41.28 (8.21) | 38.32 (12.17)* |
| >50 | 102 | 25.29 (5.12) | 275.55 (74.04) | 39.69 (10.19) | 41.80 (11.67) |
| Family status | |||||
| Single | 160 | 22.69 (4.13)† | 298.15 (71.90) | 41.42 (7.69) | 37.96 (12.09) |
| Marr‡ | 164 | 25.19 (5.07) | 281.94 (82.67) | 40.58 (9.59) | 40.32 (12.18) |
| Divo‡ | 37 | 23.50 (5.11) | 283.11 (69.13) | 39.45 (10.12) | 40.87 (11.20) |
| Education status | |||||
| Below Hs‡ | 97 | 24.62 (6.19) | 296.31 (71.99) | 38.40 (9.33)* | 40.51 (12.35) |
| Above Hs‡ | 232 | 23.68 (4.87) | 286.54 (81.60) | 42.10 (8.47) | 38.60 (12.02) |
| IBS subtypes | |||||
| IBS-C | 37 | 23.38 (5.34) | 293.13 (82.41) | 40.76 (9.33) | 40.43 (12.30) |
| IBS-D | 151 | 24.69 (5.93)§ | 293.96 (78.00) | 40.57 (9.17) | 38.74 (12.88) |
| IBS-M | 168 | 23.22 (4.01) | 283.53 (73.19) | 41.09 (8.40) | 38.98 (11.39) |
IBS-U was not included in the analysis because the sample size is too small.
Symptom severity based on IBS-SSS: mild (IBS-SSS: 75–175), moderate (IBS-SSS: 175–300) and severe (IBS-SSS: >300).
QOL based on SF-36: range from 0 (‘highest disability’) to 100 (‘no disability’).
*P<0.05.
†P<0.05 for post-hoc comparison between single and married or unmarried cohabitation.
‡Marr, married or unmarried cohabitation; Divo, divorced or widowed; Hs, high school.
§P<0.05 for post-hoc comparison between IBS-D and IBS-M.
BMI, body mass index; IBS-C, irritable bowel syndrome (IBS) with constipation; IBS-D, IBS with diarrhoea; IBS-M, mixed IBS; IBS-SSS, severity score system; QOL, quality of life.