Adapted from syntax available at the SDQ website.
The predictive algorithm is based on up to twelve input variables: phyper = SDQ hyperactivity score from parent SDQ
thyper = SDQ hyperactivity score from teacher SDQ
shyper = SDQ hyperactivity score from self-report SDQ
pconduct = SDQ conduct problems score from parent SDQ
tconduct = SDQ conduct problems score from teacher SDQ
sconduct = SDQ conduct problems score from self-report SDQ