Table 1 RCTs focused on school-bullying perpetration and/or victimization
Study a | SOR bias rating in the reviewb | RCT report mentions registry or protocolc | Our rating using criteria stated in the reviewd |
|---|---|---|---|
1. Baldry and Farrington (2004) [25] | Low | No | Unclear |
2. Beran and Shapiro (2005) [26] | Low | No | Unclear |
3. Berry and Hunt (2009) [27] | Low | No | Unclear |
4. Bonell et al. (2015) [28] | Low | Yes | Low |
5. Boulton and Flemington (1996) [29] | Low | No | Unclear |
6. Brown et al. (2011) [30] | Low | No | Unclear |
7. Chaux et al. (2016) [31] | Low | No | Unclear |
8. Cissner and Ayoub (2014) [32] | Low | No | Unclear |
9. Connolly et al. (2015) [33] | Low | No | Unclear |
10. Cross et al. (2011) [34] | Low | No | Unclear |
11. DeRosier and Marcus (2005) [35] | Low | No | Unclear |
12. Domino (2013) [36] | Low | No | Unclear |
13. Espelage et al. (2015) [37] | Low | No | Unclear |
14. Fekkes et al. (2006) [38] | Low | No | Unclear |
15. Fekkes et al. (2016) [39] | Low | No | Unclear |
16. Fonagy et al. (2009) [40] | Low | No | Unclear |
17. Frey et al. (2005) [41] | Low | No | Unclear |
18. Garaigordobil and Martínez-Valderrey (2015) [42] | Low | No | Unclear |
19. Holen et al. (2013) [43] | Low | No | Unclear |
20. Hunt (2007) [44] | Low | No | Unclear/high |
21. Jenson et al. (2013) [45] | Low | No | Unclear |
22. Ju et al. (2009) [46] | Low | No | Unclear/high |
23. Kaljee et al. (2017) [47] | Unclear | No | Unclear |
24. Kärnä et al. (2011b) [48] | Low | No | Unclear |
25. Kärnä et al. (2013) [49] | Low | No | Unclear |
26. Knowler and Frederickson (2013) [50] | Low | No | Unclear |
27. Krueger (2010) [51] | Low | No | Unclear |
28. Li et al. (2011) [52] | Low | No | Unclear |
29. McLaughlin (2009) [53] | Low | No | Unclear |
30. Meyer and Lesch (2000) [54] | Low | No | Unclear |
31. Nocentini and Menesini (2016) [55] | Low | No | Unclear |
32. Ostrov et al. (2015) [56] | Low | No | Unclear/high |
33. Polanin (2015) [57] | Low | No | Unclear |
34. Rosenbluth et al. (2004) [58] | Low | No | Unclear |
35. Spröber et al. (2006) [59] | Low | Unknowne | Unknown |
36. Stallard et al. (2013) [60] | Low | Yes | High |
37. Topper (2011) [61] | Unclear | No | Unclear |
38. Trip et al. (2015) [62] | Low | No | Unclear |
39. Tsiantis et al. (2013) [63] | Low | No | Unclear |
40. Waasdorp et al. (2012) [64] | High | No | Unclear |
41. Wölfer and Scheithauer (2014) [24] | Low | No | Unclear/high |
42. Yanagida et al. (2019) [23] | Low | No | Unclear |
Summary | 39 Low, 1 High, 2 Unclear | 2 Yes, 39 No, 1 Unknown | 1 Low 1 High, 4 Unclear/high, 35 Unclear, 1 Unknown |