TableĀ 1

Methodological quality of included studies

StudySelection biasStudy designConfoundersBlindingData collectionWithdrawalsGlobal rating
1Awofeso et al, 200143 WeakWeakWeakWeakWeakStrongWeak
2Clarke et al, 201344 StrongStrongStrongModerateStrongStrongStrong
3Cropsey and Kristeller, 200531 ModerateModerateWeakNAStrongModerateModerate
4Cropsey et al, 200830 ModerateStrongStrongWeakStrongModerateModerate
5Etter et al, 201245 WeakWeakWeakNAWeakWeakWeak
6Howell et al, 201532 WeakModerateWeakNAModerateNAWeak
7Jalali et al, 201533 ModerateStrongModerateStrongStrongStrongStrong
8Kauffman et al, 201134 ModerateModerateWeakNAStrongNAModerate
9Lasnier et al, 201146 WeakWeakWeakNAWeakNAWeak
10Leone and Kinkade, 199447 WeakWeakWeakNAModerateNAWeak
11Lincoln et al, 200942 WeakModerateWeakNAModerateWeakWeak
12MacAskill et al, 200835 WeakWeakWeakNAModerateStrongWeak
13Makris et al, 201236 WeakWeakWeakNAModerateStrongWeak
14Naik et al, 201437 ModerateStrongModerateWeakStrongStrongModerate
15Richmond et al, 20068 StrongModerateWeakWeakStrongStrongWeak
16Richmond et al, 201338 StrongStrongStrongStrongStrongStrongStrong
17Thibodeau et al, 201039 ModerateModerateWeakNAStrongStrongModerate
18Turan and Turan, 201648 StrongWeakWeakNAWeakWeakWeak
19Turner et al, 201340 ModerateWeakModerateNAWeakNAWeak
20Voglewede and Noel, 200441 WeakWeakWeakNAStrongNAWeak
  • NA, not applicable.