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Table 2 Risk of bias assessments for included trials

From: Are we failing young people not in employment, education or training (NEETs)? A systematic review and meta-analysis of re-engagement interventions

ID Total classification Sequence generation (selection bias) Allocation concealment (selection bias) Blinding (performance bias) Outcome completeness Selective outcome reporting Other biases
1 High + ? + + - -
2 Unclear + + + ? ? +
3 High + + - - + ?
4 High - - ? ? + ?
5 High - + + - ? +
6 High - + - - ? -
7 High + + NA - + +
8 High ? - - + - ?
9 High - - ? ? - +
10 High - ? ? + - ?
11 High NA NA NA - - +
12 Unclear NA NA NA + ? +
13 High NA NA ? - - +
14 High - - ? - - ?
15 Unclear ? ? + ? ? +
16 High - - ? - - ?
17 High NA NA - - + ?
18 High - - ? ? ? ?
  1. + low risk of bias; ? unclear risk of bias; - high risk of bias; NA not applicable