Table 2. Methodological quality appraisal of the included studies using the Newcastle-Ottawa Scale.
| Study |
Selectiona |
Comparabilitya |
Outcomeb |
Statistics |
| Representation of the sample |
Sample size |
Non-respondents |
Description of players |
Subtotal |
Control for most important factor (training experience) |
Control for other factors (starting strength or power) |
Subtotal |
Assessment of outcome |
Statistical test |
Subtotal |
Total (out of 10) |
High (>7) |
Mod-high (5-7) |
Low (<5) |
| Comfort et al., 2012 |
1 |
1 |
0 |
1 |
3 |
0 |
0 |
0 |
2 |
2 |
4 |
7 |
0 |
1 |
0 |
| Harris et al., 2008 |
1 |
0 |
0 |
1 |
2 |
0 |
1 |
1 |
1 |
2 |
3 |
6 |
0 |
1 |
0 |
| O’Connor and Crowe, 2007 |
1 |
0 |
0 |
1 |
2 |
0 |
0 |
0 |
2 |
2 |
4 |
6 |
0 |
1 |
0 |
| Rogerson et al., 2007 |
1 |
0 |
0 |
1 |
2 |
0 |
1 |
1 |
2 |
2 |
5 |
7 |
0 |
1 |
0 |
| de Lacey et al., 2014a |
1 |
0 |
0 |
1 |
2 |
0 |
0 |
0 |
2 |
2 |
4 |
6 |
0 |
1 |
0 |
| Daniels et al., 2019 |
1 |
1 |
0 |
1 |
3 |
0 |
0 |
0 |
2 |
2 |
4 |
7 |
0 |
1 |
0 |
| Baker, 2001b |
1 |
1 |
0 |
1 |
3 |
0 |
0 |
0 |
2 |
2 |
4 |
7 |
0 |
1 |
0 |
| Crewther et al., 2011 |
1 |
1 |
0 |
1 |
3 |
0 |
0 |
0 |
2 |
2 |
4 |
7 |
0 |
1 |
0 |
| Baker and Newton, 2008a |
1 |
0 |
0 |
1 |
2 |
0 |
0 |
0 |
2 |
2 |
4 |
6 |
0 |
1 |
0 |
| Baker and Newton, 2006 |
1 |
1 |
0 |
1 |
3 |
0 |
0 |
0 |
2 |
2 |
4 |
7 |
0 |
1 |
0 |
| Baker and Newton, 2008b |
1 |
0 |
0 |
1 |
2 |
0 |
0 |
0 |
2 |
2 |
4 |
6 |
0 |
1 |
0 |
| Baker, 2013 |
1 |
0 |
0 |
1 |
2 |
0 |
0 |
0 |
2 |
2 |
4 |
6 |
0 |
1 |
0 |
a subscale items rated 0-1;
b subscale items rated 0-2.
