Table 3.

Studies which met each of the quality assessment criteria.

Question	Number of studies which met a given criterion	Studies
1. Sample procedure of cohort described?	18	S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S13, S14, S15, S16, S17, S18
2. Population characteristics described?	20	S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S13, S14, S15, S16, S17, S18, S19, S20
3. Inclusion and exclusion criteria described?	18	S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S14, S15, S17, S18, S19, S20
4. Studied population ≥ 75% of the originally selected population?	13	S1, S2, S3, S4, S6, S7, S9, S10, S12, S14, S15, S17, S20
5. Information about responders vs non responders?	12	S1, S2, S3, S5, S6, S7, S8, S9, S11, S14, S15, S17
6. Lost to follow-up < 20%?	5	S1, S3, S9, S16, S18
7. Information about completers vs non-completers?	20	S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S13, S14, S15, S16, S17, S18, S19, S20
8. Are sleep disturbances assessed for clinical diagnosis?	2	S2, S14
9. Are externalizing behaviors assessed for clinical diagnosis?	2	S2, S14
10. Same measures for baseline and follow-up?	18	S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S13, S14, S15, S16, S17, S18,
11. Does the sleep variable assess a specific sleep-related problem?	10	S2, S4, S9, S10, S11, S15, S16, S18, S19, S20
12. Correction for potential demographic confounders?	13	S1, S3, S4, S5, S7, S8, S9, S11, S14, S17, S18, S19, S20
13. Correction for circadian rhythm disorders, alcohol & drug use, exercise, or caffeine intake?	2	S2, S11
14. Correction for other potential non-demographic confounders, such as physical disorders or medication?	8	S1, S3, S4, S5, S9, S14, S19, S20
15. Are given data usable/transformable for meta-analysis?	20	S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S13, S14, S15, S16, S17, S18, S19, S20