Table 3.
The heterogeneity of the included studies through sensitivity analysis
| Excluded study arm | SMD (95% CI) | I2 (%) | p value |
|---|---|---|---|
| Before excluding | -1.51 (-2.47, -0.56) | 97.8 | < 0.001 |
| Bai 2000 | -1.48 (-2.50, -0.46) | 97.9 | < 0.001 |
| Kilic 2004 | -1.46 (-2.47, -0.45) | 97.9 | < 0.001 |
| Dai 2005 | -1.46 (-2.47, -0.44) | 97.8 | < 0.001 |
| Liang 2005 | -1.42 (-2.42, -0.42) | 97.9 | < 0.001 |
| Wu 2006 | -1.30 (-2.27, -0.34) | 97.8 | < 0.001 |
| Li 2006 | -1.71 (-2.76, -0.67) | 97.7 | < 0.001 |
| Li 2008 | -1.74 (-2.74, -0.74) | 97.4 | < 0.001 |
| Joo 2009 | -1.25 (-2.09, -0.40) | 96.9 | < 0.001 |
| Wang 2010 | -1.68 (-2.74, -0.62) | 97.9 | < 0.001 |
| Cihan 2011 | -1.69 (-2.75, -0.63) | 97.9 | < 0.001 |
| Feng 2012 | -1.49 (-2.51, -0.47) | 97.9 | < 0.001 |