Table 1.

Patient details

	Placebo group	Synbiotic group
No of patients	65	72
Age (y) (median (IQR))	71 (66–80)	71 (47–76)
Sex (M:F)	42:23	38:34
POSSUM score (median (IQR))	28 (25–32)	30 (25–33)
Diagnosis
Gastrointestinal malignancy	43	43
Inflammatory bowel disease	7	10
Diverticular disease	7	6
Aortic aneurysm	3	2
Other	5	11

IQR, interquartile range.