Study | Signalling questions | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | |
Ghajar et al., 2013 [43] | Unclear | Low | Unclear | Unclear | Low | Unclear | Low | Low | Low | Low |
Hellsing and Hammarström, 1991 [44] | Unclear | Low | Unclear | Unclear | Low | Unclear | Low | Low | Low | Low |
Kim and Lee, 2000 [45] | Unclear | Low | Unclear | Unclear | Low | Unclear | Low | Low | Low | Low |
Macari et al., 2018 [46] | Unclear | Low | Unclear | Unclear | Low | Unclear | Low | Low | Low | Low |