Table 2.

The results of operation-related data and complications in observational studies

Laparoscope vs open group	No. of studies	Pfor Heterogeneity	Effect model	Pooled estimate	95% Confidence interval	Pfor Test for overall effect
operating times	4	< 0.00001	random	11.97	0.87 to 23.06	0.03
hospital stays	2	< 0.00001	random	-0.68	-3.33 to 1.96	0.61
exit site and tunnel infection	6	0.79	fixed	0.76	0.45 to 1.28	0.30
peritonitis	6	0.23	fixed	0.74	0.48 to 1.15	0.18
dialysate leaks	10	0.33	fixed	1.00	0.56 to 1.80	0.99
catheter migration	3	0.06	fixed	0.56	0.20 to 1.62	0.29
pericannular bleeding	3	0.22	fixed	0.40	0.09 to 1.85	0.24
blockage	7	0.04	random	0.66	0.27 to 1.62	0.36
hernia	3	0.72	fixed	1.10	0.47 to 2.58	0.83