Resection and primary anastomosis with or without modified blow-hole colostomy for sigmoid volvulus

Table 1 Operative procedure, morbidity and deaths in 47 patients

Procedure	No. of patients	Wound infection	Anastomotic dehiscence	Deaths
RPA (Group A)	25 (16V, 9G)	6V, 2G	2V, 1G	1V, 1G
RPA with modified blow-hole colostomy (Group B)	22 (17V, 4G, 1P)	2V	-	1V, 1G
Total	47 (33V, 13G, 1P)	10 (8V, 2G)	3 (2V, 1G)	4 (2V, 2G)

V: Viable; G: Gangrenous; P: Perforation; RPA: Resection and primary anastomosis.

Table 2 Comparison of confounding variables between Group A (RPA) and Group B (RPA with modified blow-hole colostomy)

Variable	Group A (n = 25)	Group B (n = 22)	Statistical test and significance
Age (yr)	66.12 ± 14.17	62.27 ± 16.26	Unpaired t-test, P = 0.391
Sex: Female ratio	4/25 (16%)	3/22 (13.6%)	Fisher’s exact test, χ2-test, P = 0.574
Hospital stay (d)	13.68 ± 8.47	16.72 ± 4.90	Unpaired t-test, P = 0.145
Wound infection	8 (32%)	2 (9.1%)	χ2-test, P = 0.11
Anastomotic leak	3 (12%)	-	Fisher’s exact test, χ2-test, P = 0.142
Mortality	2 (8%)	2 (10%)	Fisher’s exact test, χ2-test, P = 0.645