(a) Changes of bowel habits according to frequency and consistency scores before and after gastric bypass surgery

Time	Baseline	12 mo.	Baseline	12 mo.
	frequency	frequency	consistency	frequency
Patient no.	103	103	103	103
Frequency/ Consistency
<2 per week/ constipated	9	6	12	8
3 times per week/firm	23	19	26	14
1 day/normal	55	44	62	48
2 per day/solid to watery	13	19	2	27
>2 per day/liquid	3	15	1	6

Number of patients with frequency and consistency scores ranging from 1 to 5 points.