Comparison of two types of colectomy in treating slow transit constipation with or without melanosis coli

Table 1 Patient characteristics

Variable	n	Gender (M/F)	Age (yr)	Duration of constipation (yr)	Number of stools per week (preoperative)
ISA	22
With MC	14	6/8	54.8 ± 12.3	12 ± 3	1.1 ± 0.3
Without MC	8	4/4	52.6 ± 11.3	10 ± 2	1.2 ± 0.4
CRA	26
With MC	14	7/7	53.1 ± 10.5	9 ± 2	1.0 ± 0.3
Without MC	12	4/8	55.8 ± 13.0	8 ± 2	1.1 ± 0.4

ISA: Ileosigmoidal anastomosis; MC: Melanosis coli; CRA: Caecorectal anastomosis.

Table 2 Three-year postoperative follow-up of ileosigmoidal anastomosis and caecorectal anastomosis

Variable	ISA			CRA
	With MC	Without MC	Total	With MC	Without MC	Total
	(n = 14)	(n = 8)	(n = 22)	(n = 14)	(n = 12)	(n = 26)
Number of stools (per day)	4.5 ± 1.8	5.5 ± 2.4	4.9 ± 2.0	1.7 ± 1.3a	3.0 ± 1.4ac	2.3 ± 1.5a
Wexner scores	5.0 ± 1.5	4.9 ± 1.2	5.0 ± 1.4	3.1 ± 1.4a	3.3 ± 1.5a	3.2 ± 1.4a
GIQLI	106 ± 9	103 ± 12	105 ± 10	100 ± 6a	116 ± 6ac	107 ± 10

^aP < 0.05, ISA group vs CRA group;

^cP < 0.05, MC group vs no-MC group in respective subgroups. ISA: Ileosigmoidal anastomosis; MC: Melanosis coli; CRA: Caecorectal anastomosis; GIQLI: Gastrointestinal quality of life index.