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Research Article

Changes in the frequency and characteristics of children diagnosed with autistic disorder in two Norwegian cohorts: 1992 and 2009

Background:Is the increasing prevalence of autistic disorder (AD) a well-documented trend or merely a reflection of the wider recognition of AD among both the public at large and health care professionals? Data from relevant studies are frequently compromised by comparisons of different sites and different diagnostic methods.Objectives:To explore changes over time, we reviewed the following: 1) the frequency of AD diagnoses; 2) the characteristics of the diagnosed children; and 3) the ages of

Sidsel Romhus, Gyro Aas Herder, Elisabeth Grindheim, Synnve Schjølberg, Patricia Howlin

Scandinavian Journal of Child and Adolescent Psychiatry and Psychology , ISSUE 1, 3–12

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