The screening accuracy of the BITSEA scales with regard to autism spectrum disorders: Area Under the Curve and sensitivity, specificity, liklihood ratio's, diagnostic odd ratio and Youden's index for a range of Problem and Competence scores, for the total sample and for subgroups by gender.

* The Competence scale AUCs differ significantly between boys and girls (i.e. the 95% confidence intervals do not overlap)
Note: AUC = area under the curve; 95%CI = 95% confidence interval; sens = sensitivity; spec = specificity; LHR+ = likelihood
ratio positive test; LHR− = likelihood ratio negative test; OR = diagnostic odds ratio; J = Youden's index.
All AUC's were significant (p<0.001). Scores with the highest unrounded Youden's index are indicated in bold.