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Increasing incidence of some neuropsychiatric disorders in Danish children

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Are diagnoses of autism and other childhood neuropsychiatric disorders increasing?

Atladottir HO, Parner ET, Schendel D, et al. Time trends in reported diagnoses of childhood neuropsychiatric disorders: a Danish cohort study. Arch Pediatr Adolesc Med 2007;161:193–8.


Embedded ImageDesign:

Retrospective cohort study (cohort identified through birth records).

Embedded ImageSetting:

The study was a national study in Denmark; follow-up data from 1995–2004.

Embedded ImagePopulation:

669 995 children born between 1 January 1990 and 31 December 1999 in Denmark (representing all children born in Denmark during that period). Children were counted as having a disorder if they received their diagnoses after 1 January 1995 (when in-patient admission data became available and ICD-10 was adopted in the Danish National Psychiatric Registry).

Embedded ImageAssessment:

Children born between 1 January 1990 and 31 December 1999 were identified through their population registry number (routinely assigned to all live births in Denmark). Information on clinical diagnoses, admissions for psychiatric care, and attendance at out-patient psychiatric clinics was collected …

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  • Sources of funding: Unclear.


  • Competing interests: None.