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

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.