First author | Year | Quality indicators from Newcastle–Ottawa Scale | Scores | |||||||
---|---|---|---|---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | |||
Raponi [28] | 2009 | ★ | ★ | – | – | ★★ | ★ | ★ | ★ | 7 |
Saito [29] | 2011 | ★ | ★ | – | ★ | ★★ | ★ | ★ | ★ | 8 |
Yi G [30] | 2014 | ★ | ★ | – | – | ★★ | ★ | ★ | ★ | 7 |
Voortman [31] | 2010 | – | – | – | ★ | ★★ | ★ | ★ | ★ | 6 |
Donnem [32] | 2011 | ★ | – | – | – | ★★ | ★ | ★ | ★ | 6 |
Sanfiorenzo [33] | 2013 | ★ | ★ | – | ★ | ★★ | ★ | ★ | ★ | 8 |
Xue [34] | 2016 | ★ | ★ | – | ★ | ★★ | ★ | ★ | – | 7 |