Table 4.

Multivariate linear regression analysis for variables correlating with colon length

	Entire colon			Proximal colon			Distal colon
	Coefficients	95% CI	p value	Coefficients	95% CI	p value	Coefficients	95% CI	p value
Age	0.22	0.00 to 0.45	0.053	0.19	0.03 to 0.35	0.017	0.031	− 0.11 to 0.17	0.66
Gender (M 1, F 2)	10.8	3.9 to 17.6	0.002	8.8	4.0 to 13.5	< 0.001	2.0	− 2.3 to 6.3	0.37
Weight	− 0.0041	− 2.0 to 2.0	0.997	− 0.57	− 0.36 to 1.80	0.42	0.57	− 0.71 to 1.84	0.38
Height	0.38	− 1.2 to 1.9	0.63	0.72	− 0.90 to 0.61	0.19	− 0.34	− 1.33 to 0.65	0.50
Body Mass Index	0.40	− 4.9 to 5.7	0.88	2.0	− 1.7 to 5.6	0.29	− 1.6	− 4.9 to 1.8	0.35
History of surgery	0.057	− 3.6 to 3.8	0.98	− 0.78	− 3.35 to 1.80	0.55	0.83	− 1.51 to 3.18	0.49
Bowel habits	4.7	1.6 to 7.7	0.003	2.9	0.8 to 5.1	0.007	1.7	− 0.2 to 3.7	0.079

Colon was divided into proximal segment and distal segment at the height of the iliac crest. History of laparotomy was classified in major (2), minor (1) and none (0). Bowel habits were classified into a daily group (1), an intermediate group (2) and a constipated group (3)

CI confidence interval, M male, F female