Table 4 Meta-regression analyses of the effects of potential moderators

Proportion of hospitalized participants, %

11

−0.030

0.139

−0.217

0.828

0.021

Proportion of male participants, %

13

0.101

0.464

0.217

0.828

0.033

Mean age of participants, years

13

0.009

0.004

2.467

0.014^*

0.020

Instrument used to identify ASD

13

−0.046

0.103

−0.455

0.649

0.032

Quality assessment score

13

−0.142

0.054

−2.661

0.008^*

0.019