Table 4 Newcastle-Ottawa Scale score for included studies
Studies | Total score (/9 points) |
|---|---|
Arabi et al., 2012 [36] | 7 points |
Bleicher et al., 2011 [38] | 9 points |
Chen et al., 1997 [39] | 8 points |
Hrafnkelsson et al., 2013 [31] | 8 points |
Liu-Ambrose et al., 2006 [22] | 8 points |
Milliken et al., 2008 [29] | 8 points |
Cadogan et al. [34], | 8 points |
Vicente-Rodriguez et al., 2005 [27] | 7 points |
Young et al., 2001 [25] | 5 points |
Heidemann et al. [32], | 6 points |
Wang et al., 2007 [26] | 7 points |
Sirola et al., 2006 [11] | 7 points |
Sirola et al., 2005 [28] | 7 points |
Sirola et al., 2006 [37] | 7 points |
Kwon et al., 2007 [30] | 9 points |