Table 2. Effect of obesity on SIBO as shown by univariate and multivariate analysis.
| Obesity measurement | Univariate analysis | Multivariate analysis* | ||
|---|---|---|---|---|
| OR (95% CI) | P value | OR (95% CI) | P value | |
| BMI, kg/m2 | ||||
| BMI < 23 | 1 | - | 1 | - |
| 23 ≤ BMI < 25 | 0.364 (0.218–0.595) | < 0.001 | 0.468 (0.206–0.178) | 0.097 |
| BMI ≥ 25 | 0.362 (0.236–0.579) | < 0.001 | 0.396 (0.232–0.824) | 0.018 |
| WC, cm | ||||
| WC < 85 (W), WC < 90 (M) | 1 | - | 1 | - |
| WC ≥ 85 (W), WC ≥ 90 (M) | 0.521 (0.344–0.791) | 0.002 | 0.482 (0.286–0.909) | 0.021 |
SIBO = small intestinal bacterial overgrowth, OR = odds ratio, CI = confidence interval, BMI = body mass index, WC = waist circumference, W = woman, M = man.
*Multivariate analysis was performed by using binary logistic regression analysis. Adjusted for age, gender, current smoking habits, weekly frequency of moderate physical activity, diabetes mellitus, hypertension, dyslipidemia, and alcohol consumption.