Latent Class and Factor Analysis of DSM-IV ADHD: A Twin Study of Female Adolescents

Objective In an attempt to validate the current DSM-IV criteria for attention-deficit/hyperactivity disorder (ADHD) in females and to determine whether symptoms are continuously distributed or categorically discrete, the authors performed factor and latent class analysis on ADHD symptom data from a large general population of adolescent female twins (1,629 pairs). Method A structured diagnostic assessment of DSM-IV ADHD was completed with at...