Table 6. Sensitivity analysis of the Meta-analysis.

Study excluded	Fixed effects model		Test of homogeneity
	WMD	95%CI	Q	I2(%)	P
None	33.66	26.16, 41.15	24.89	43.8	0.036
Takahashi[16] (2013)	34.46	26.87, 42.04	23.17	43.9	0.040
Sayin[23] (2014)	33.65	25.84, 41.45	24.89	47.8	0.024
Sayin[23] (2014)	36.68	28.86, 44.50	17.73	26.7	0.168
Goktas[7] (2014)	33.68	26.05, 41.32	24.89	47.8	0.024
Goktas[7] (2014)	33.87	22.26, 41.49	24.79	47.6	0.025
Garg[14] (2014)	33.19	25.63, 40.74	23.98	45.8	0.031
Kara[15] (2014)	33.60	25.27, 41.93	24.89	47.8	0.024
Atas[8] (2014)	32.09	24.40, 39.77	21.54	39.6	0.063
Atas[8] (2014)	33.82	26.09, 41.55	24.86	47.7	0.024
Ulusoy[22] (2015)	28.56	20.51, 36.60	13.22	1.7	0.431
Dadaci[13] (2015)	34.54	26.87, 42.21	23.75	45.3	0.034
Dadaci[13] (2015)	34.50	26.82, 42.17	23.90	45.6	0.032
Dadaci[13] (2015)	33.80	26.15, 41.45	24.86	47.7	0.024
Dadaci[13] (2015)	33.78	26.13, 41.43	24.87	47.7	0.024
Present (2015)	34.37	26.31, 42.43	24.67	47.3	0.026