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. 2019 Jul 30;10:727. doi: 10.3389/fneur.2019.00727

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