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.