Skip to main content
. 2017 Apr 14;32(6):948–953. doi: 10.3346/jkms.2017.32.6.948

Table 3. The relationship between the BMI & WC quartiles and SIBO.

Obesity measurement Univariate analysis Multivariate analysis*
OR (95% CI) P value OR (95% CI) P value
BMI, kg/m2
 1st quartile (15.5–22.1) 1.000 - 1.000 -
 2nd quartile (22.2–24.1) 0.403 (0.242–0.692) 0.001 0.444 (0.216–0.191) 0.109
 3rd quartile (24.2–26.2) 0.228 (0.137–0.425) < 0.001 0.321 (0.178–0.786) 0.020
 4rd quartile (26.3–47.1) 0.301 (0.179–0.524) < 0.001 0.294 (0.164–0.742) 0.010
P for trend < 0.001 - < 0.001 -
WC, cm
 1st quartile (63–79) 1.000 - 1.000 -
 2nd quartile (80–85) 0.515 (0.322–0.895) 0.011 0.522 (0.197–1.915) 0.208
 3rd quartile (86–90) 0.411 (0.241–0.725) 0.002 0.631 (0.290–1.346) 0.329
 4rd quartile (91–119) 0.291 (0.170–0.516) < 0.001 0.282 (0.116–0.564) 0.007
P for trend < 0.001 - < 0.001 -

BMI = body mass index, WC = waist circumference, SIBO = small intestinal bacterial overgrowth, OR = odds ratio, CI = confidence interval.

*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.