Abstract:
BACKGROUND:Based on prevalence studies and the few incidence studies of pervasive developmental disorders (PDDs) the prevalence and incidence of these disorders have been claimed to be increasing. METHOD:The annual and age-specific prevalence and incidence rates of childhood autism, atypical autism, Asperger's disorder, and pervasive developmental disorder not otherwise specified (PDD-NOS) in Denmark during the period 1971--2000 in children younger than 10 years were estimated using data from the Danish Psychiatric Central Register. RESULTS:A total of 2.4 million children younger than 10 years were followed and 2061 cases with the PDDs studied were identified. Generally, the prevalence and incidence rates of the PDDs studied were stable until the early 1990s after which an increase in the occurrence of all disorders was seen, until 2000. The annual incidence rate per 10000 children younger than 10 years was 2.0 for childhood autism, 0.7 for atypical autism, 1.4 for Asperger's disorder, and 3.0 for PDD-NOS in 2000. We calculated a 'corrected' prevalence of childhood autism at 11.8, atypical autism at 3.3, Asperger's disorder at 4.7, and PDD-NOS at 14.6 per 10,000 children younger than 10 years on 1 January 2001. CONCLUSIONS:We found that the estimated prevalences of the PDDs studied were probably underestimated. Furthermore, the increasing prevalence and incidence rates during the 1990s may well be explained by changes in the registration procedures and more awareness of the disorders, although a true increase in the incidence cannot be ruled out.
journal_name
Psychol Medjournal_title
Psychological medicineauthors
Lauritsen MB,Pedersen CB,Mortensen PBdoi
10.1017/s0033291704002387subject
Has Abstractpub_date
2004-10-01 00:00:00pages
1339-46issue
7eissn
0033-2917issn
1469-8978journal_volume
34pub_type
杂志文章abstract::Fifty-six bulimia nervosa patients were treated by means of a behavioural approach and followed for at least one year after completion or dropping out of treatment. Outcome was encouraging in about half of the patients and several psychiatric indicators, such as duration of illness and response to treatment, were iden...
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更新日期:2014-07-01 00:00:00
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