Table 4.

The results of infections in observational studies

Infections		Results				Heterogeneity
Parameter	N/Pt-yr	Effects Model	Pooled Estimate	95% CI	P-value	Chi2	I2	P-value
Peritonitis
Early [14, 16]	2/193	fixed	0.44	0.15 to 1.33	0.15	3.56	72%	0.15
Late [12, 14, 16]	3/270	fixed	0.89	0.41 to 1.90	0.76	5.02	60%	0.76
Total [10, 12, 14, 16, 18–20]	9/749	fixed	0.68	0.42 to 1.12	0.13	12.61	37%	0.13
Tunnel /exit-site infection
Early [14]	1/45	fixed	0.39	0.06 to 2.36	0.30	Not applicable
Late [12, 14, 16]	3/270	fixed	1.35	0.78 to 2.33	0.16	3.68	46%	0.29
Total [12, 14, 16]	4/315	fixed	1.20	0.71 to 2.02	0.49	5.00	40%	0.17

N/Pt-yr: No. of studies / Patient-years