Table 2.
Qualitative assessment of the studies by the Newcastle-Ottawa Quality Assessment scale for Cohort and Case-Control Studies (NOS).
Selection | Comparability | Exposure | Total | |||||||
---|---|---|---|---|---|---|---|---|---|---|
Diagnosis | Is the case definition adequate? | Representativeness of the cases | Selection of controls | Definition of controls | Comparability of cases and controls on the basis of the design or analysis | Ascertainment of exposure | Same method of ascertainment for cases and controls | Non-response rate | Number of stars | |
Prehn-Kristensen (32) | ADHD | * | * | 2 | ||||||
Jiang (33) | ADHD | * | * | * | * | 4 | ||||
Zhai (39) | ASD | * | * | * | 3 | |||||
Liu (38) | ASD | * | * | * | * | 4 | ||||
Pulikkan (36) | ASD | * | * | * | 3 | |||||
Zhang (37) | ASD | * | * | * | * | * | 5 | |||
Luna (35) | ASD | * | * | * | * | 4 | ||||
Son (34) | ASD | * | * | * | 3 | |||||
Hicks (40) | ASD | * | * | 2 | ||||||
Qiao (41) | ASD | * | * | * | * | * | 5 |