Table 2 Quality scores of the included studies
Authors | Criteria | ||||||||
|---|---|---|---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | 6 | 7 | Score | Quality | |
Uziel 2006 [30] | – | – | – | + | – | – | – | 1 | Low |
Skinner 2002 [3] | + | + | + | + | – | + | – | 5 | High |
Kermond 2002 [18] | + | + | + | + | + | + | + | 7 | High |
Fischer 1999 [4] | + | + | + | – | + | + | – | 5 | High |
Mattick 1999 [27] | – | – | + | – | – | + | + | 3 | Low |
Eggl 1999 [12] | + | + | + | + | + | + | – | 6 | High |
De Pellegrin 1997 [11] | + | + | – | + | + | – | – | 4 | Low |
Kesteris 1996 [19] | + | + | + | + | + | – | + | 6 | High |
Keenan 1996 [17] | – | + | – | + | + | + | + | 5 | High |
Taylor 1995 [29] | + | – | + | – | – | – | – | 2 | Low |
Gopakumar 1992 [2] | + | – | + | + | – | – | – | 3 | Low |
Terjesen 1991 [22] | + | + | + | + | + | – | + | 6 | High |
Briggs 1990 [23] | + | – | + | + | – | + | + | 5 | High |
Hasegawa 1988 [14] | + | + | + | – | + | – | + | 5 | High |
Kallio 1988 [16] | + | + | + | – | + | + | + | 6 | High |
Landin 1987 [1] | + | – | + | + | – | – | + | 4 | Low |
Egund 1987 [13] | – | + | + | – | + | + | + | 5 | High |
Kallio 1986 [15] | – | + | + | + | + | + | + | 6 | High |
Haueisen 1986 [24] | + | – | + | + | – | + | – | 4 | Low |
Mukamel 1985 [20] | + | + | + | + | + | – | – | 5 | High |
Illingworth 1983 [25] | + | – | – | – | – | – | – | 1 | Low |
Sharwood 1981 [28] | – | – | – | – | – | – | + | 1 | Low |
Calver 1981 [10] | + | + | + | + | + | + | + | 7 | High |
Mallet 1981 [26] | + | – | + | + | – | – | + | 4 | Low |
Stock 1977 [21] | + | + | – | + | – | – | + | 4 | Low |