Colonic J-pouch versus side-to-end anastomosis for rectal cancer: a systematic review and meta-analysis of randomized controlled trials

Table 3 Bowel functional outcomes

Bowel functional outcomes	No. of studies	J-pouch		Side-to-end		I² (%)	Analysis model	OR/WMD	95% CI	P value
Bowel functional outcomes	No. of studies	Patients	Mean/rate	Patients	Mean/rate	I² (%)	Analysis model	OR/WMD	95% CI	P value
Baseline
Stool frequency	3	122	1.1^#	134	1.3^#	71	Random	− 0.19^†	− 0.42, 0.03	0.09
Urgency	3	92	11%^{^}	97	8%^{^}	19	Fixed	1.32^*	0.52, 3.39	0.56
Incomplete defecation	2	74	4%^{^}	74	1%^{^}	0	Fixed	2.39^*	0.34, 16.67	0.38
Short term
Stool frequency	5	195	2.7^#	208	3.0^#	95	Random	− 0.30^†	− 1.04, 0.44	0.42
Urgency	4	115	30%^{^}	121	41%^{^}	0	Fixed	0.53^*	0.28, 1.00	0.05
Incomplete defecation	3	97	35%^{^}	98	27%^{^}	0	Fixed	1.65^*	0.83, 3.28	0.15
Medium term
Stool frequency	4	164	2.6^#	173	2.9^#	96	Random	− 0.32^†	− 1.10, 0.45	0.41
Urgency	3	84	37%^{^}	86	48%^{^}	42	Fixed	0.67^*	0.34, 1.29	0.23
Incomplete defecation	2	66	36%^{^}	63	51%^{^}	31	Fixed	0.56^*	0.28, 1.12	0.10
Long term
Stool frequency	3	135	1.4^#	138	1.8^#	91	Random	− 0.34^†	− 0.84, 0.16	0.19
Urgency	2	55	22%^{^}	51	39%^{^}	0	Fixed	0.40^*	0.16, 1.01	0.05
Incomplete defecation	2	55	33%^{^}	51	39%^{^}	0	Fixed	0.71^*	0.31, 1.62	0.41

OR odds ratio, ^#pooled mean, ^{^}pooled rate, WMD weighted mean difference, CI confidence interval, *OR, ^†WMD

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