Table 7.

Sensitivity analysis of studies included in the meta-analysis

Studies excluded	SMD (95%CI)	Test for overall effect
Alonso et al, 2007	-0.47 [-0.59, -0.35]	Z = 7.80 (P < 0.00001)
An et al, 2007	-0.49 [-0.61, -0.37]	Z = 7.88 (P < 0.00001)
Chuang et al_male, 2009	-0.48 [-0.61, -0.35]	Z = 7.39 (P < 0.00001)
Cindoruk et al, 2007	-0.49 [-0.61, -0.38]	Z = 8.48 (P < 0.00001)
D'Onghia et al_case, 2007	-0.47 [-0.60, -0.35]	Z = 7.64 (P < 0.00001)
D'Onghia et al_control, 2007	-0.49 [-0.61, -0.37]	Z = 7.95 (P < 0.00001)
Gokcel et al, 2003	-0.49 [-0.61, -0.36]	Z = 7.84 (P < 0.00001)
Isomoto et al, 2004	-0.46 [-0.57, -0.35]	Z = 7.96 (P < 0.00001)
Isomoto et al, 2005a	-0.47 [-0.60, -0.35]	Z = 7.47 (P < 0.00001)
Isomoto et al, 2005b	-0.47 [-0.59, -0.34]	Z = 7.43 (P < 0.00001)
Isomoto et al, 2005c	-0.48 [-0.61, -0.35]	Z = 7.14 (P < 0.00001)
Jun et al, 2007	-0.49 [-0.61, -0.36]	Z = 7.72 (P < 0.00001)
Kawashima et al, 2009	-0.48 [-0.61, -0.35]	Z = 7.32 (P < 0.00001)
Nishi et al, 2005	-0.49 [-0.59, -0.39]	Z = 9.72 (P < 0.00001)
Osawa et al, 2005	-0.46 [-0.58, -0.34]	Z = 7.45 (P < 0.00001)
Plonka et al_ch1 2006	-0.46 [-0.58, -0.34]	Z = 7.65 (P < 0.00001)
Roper et al, 2008	-0.51 [-0.63, -0.39]	Z = 8.37 (P < 0.00001)
Shak et al, 2008	-0.48 [-0.60, -0.36]	Z = 7.79 (P < 0.00001)
Shiotani et al, 2005	-0.46 [-0.59, -0.34]	Z = 7.33 (P < 0.00001)
Uzzan et al, 2007	-0.47 [-0.59, -0.35]	Z = 7.76 (P < 0.00001)