Table 2.

Colon length by variables correlating with colon length

	N	Entire colon length, cm (mean ± SD)	p value*	Proximal colon length, cm (mean ± SD)	p value*	Distal colon length, cm (mean ± SD)	p value*
All	295	150.3 ± 18.5		90.1 ± 12.9		60.4 ± 11.3
Age (years)
40–59	163	149.6 ± 17.2	0.18	89.2 ± 12.2	0.10	60.5 ± 10.8	0.74
60–79	121	150.9 ± 19.5		90.7 ± 13.4		60.1 ± 11.9
80 or older	11	160.2 ± 25.2		97.3 ± 17.9		62.9 ± 13.4
Gender
Male	154	147.1 ± 18.3	0.022	87.5 ± 12.9	0.0003	59.5 ± 11.5	0.17
Female	141	154.3 ± 18.1		92.9 ± 12.5		61.4 ± 11.1
Body mass index
< 18.5	18	151.3 ± 18.7	0.73	90.2 ± 15.8	0.17	61.1 ± 13.1	0.64
≥ 18.5, < 25	201	150.0 ± 18.2		89.3 ± 11.8		60.7 ± 11.2
≥ 25	74	151.9 ± 19.6		92.6 ± 14.9		59.3 ± 11.3
History of laparotomy
Major	15	156.7 ± 17.5	0.14	96.7 ± 14.3	0.051	59.9 ± 10.8	0.56
Minor	72	149.7 ± 17.5		87.9 ± 11.8		61.7 ± 9.5
None	208	150.4 ± 18.9		90.4 ± 13.1		60.0 ± 11.9
Bowel habits
Daily	189	147.7 ± 17.9	0.003	88.2 ± 12.6	0.001	59.2 ± 11.1	0.058
Intermediate	68	154.7 ± 18.5		92.0 ± 12.8		62.7 ± 12.0
Constipated	38	158.6 ± 18.3		96.3 ± 12.8		62.2 ± 10.5

Colon was divided into proximal segment (cecum to descending colon) and distal segment (sigmoid colon and rectum) at the height of the iliac crest. History of laparotomy was classified in major (e.g., gastro-intestinal or uterus resection), minor (e.g., appendectomy) and none. Bowel habits were classified into a daily group (every day), an intermediate group (once every 2 or 3 days) and a constipated group (less than once in 3 days)

SD standard deviation

*Calculated using one-way ANOVA