Table 4.

Statistics under a fixed model for each study included in the meta-analysis.

Study name	Odds ratio	Lower limit	Upper limit	Z value	P value	Relative weight	Std. residual
Gamboa-Bobadilla, 2006 [9]	0.486	0.018	12.929	−0.431	0.667	0.55	−1.09
Bindingnavele et al. 2007 [10]	2.750	0.256	29.561	0.835	0.404	1.06	−0.08
Nahabedian, 2009 [11]	4.030	1.336	12.159	2.473	1.338	4.89	0.53
Namnoum, 2009 [12]	2.429	0.082	72.046	0.513	0.608	0.52	−0.12
Colwell et al. 2011 [13]	2.654	1.327	5.304	2.761	0.006	12.44	−0.38
Israeli and Feingold, 2011 [14]	1.268	0.474	3.391	0.474	0.636	6.17	−1.78
Joanna Nguyen et al. 2011 [15]	0.253	0.029	2.221	−1.240	0.215	1.27	−2.25
Rawlani et al. 2011 [16]	2.803	1.013	7.757	1.985	0.047	5.76	−0.14
Nicolau et al. 2012 [7]	0.342	0.018	6.468	−0.716	0.474	0.69	−1.46
Salzberg et al. 2011 [17]	2.890	0.791	10.555	1.605	0.108	3.56	−0.06
Salzberg et al. 2013 [18]	0.733	0.038	14.044	−0.206	0.837	0.68	−0.94
Spear et al. 2012 [19]	9.114	5.778	14.377	9.503	0.000	28.74	5.64
Seth et al. 2012 [20]	1.896	0.878	4.094	1.628	0.103	10.07	−1.24
Parks et al. 2012 [21]	0.426	0.191	0.948	−2.091	0.036	9.32	−5.03
Cheng et al. 2013 [22]	29.000	0.780	1077.623	1.826	0.068	0.46	1.23
Clemens and Kronowitz, 2012 [23]	4.126	1.929	8.822	3.655	0.000	10.33	0.86
Hanna et al. 2013 [24]	0.217	0.022	2.131	−1.311	0.190	1.14	−2.27
Patel et al. 2013 [25]	0.231	0.009	6.107	−1.877	0.380	0.56	−1.54
Potter et al. 2013 [8]	36.000	3.453	375.309	2.996	0.003	1.09	2.09
Weichman et al. 2013 [26]	21.364	1.139	400.534	2.047	0.041	0.69	1.31
Model: fixed	3.010	2.358	3.844	8.841	0.000