Table 2.
Methodological quality of included trials.
| First Author and Year | Randomization | Double Blinding | Withdrawals | Appropriate Randomization | Appropriate Double Blinding | Total |
|---|---|---|---|---|---|---|
| Anderson (2002) [28], Trial 2 | 1 | 0 | 0 | 0 | 0 | 1 |
| Anderson (2002) 28], Trial 3 | 1 | 0 | 1 | 0 | 0 | 2 |
| Anderson (2010) [29], Trial 1 | 1 | 0 | 0 | 0 | 0 | 1 |
| Anderson (2010) [29], Trial 2 | 1 | 0 | 0 | 0 | 0 | 1 |
| Flint (2006) [30] | 1 | 0 | 0 | 1 | 0 | 2 |
| Furchner-Evanson (2010) [31] | 1 | 0 | 1 | 0 | 0 | 2 |
| Holt (1995) [33] | 1 | 0 | 0 | 0 | 0 | 1 |
| Kaplan (2002) [34] | 1 | 0 | 1 | 0 | 0 | 2 |
| Kristensen (2010) [35] | 1 | 0 | 1 | 0 | 0 | 2 |
| Lumaga (2012) [36] | 1 | 0 | 0 | 0 | 0 | 1 |
| Rodin (1991) [37] | 1 | 0 | 0 | 0 | 0 | 1 |