A Conservative Weight Loss Intervention Relieves Bowel Symptoms in Morbidly Obese Subjects with Irritable Bowel Syndrome: A Prospective Cohort Study

Table 2

Number (proportion) of subjects with irritable bowel syndrome (IBS) before and after the weight loss intervention.

	IBS after intervention	Without IBS after intervention	Sum
IBS before intervention	10 (11.4%)	14 (15.9%)	24 (27.3%)
Without IBS before intervention	7 (8.0%)	57 (64.7%)	64 (72.7%)
Sum	17 (19.3%)	71 (80.7%)	88 (100%)

Prevalence of IBS before intervention is 27.3% and after intervention is 19.3%. Difference between before and after intervention is 8.0% (Newcombe 95% CI −18.2% to 2.4%). McNemar’s asymptotic value is 0.126.