title: Age at onset of panic disorder: influence of familial liability to the disease and of childhood separation anxiety disorder.
abstract: OBJECTIVE
  The authors investigated the relation of age at onset of panic disorder to liability to panic disorder and agoraphobia.
  
  
  METHODS
  Two hundred thirty-one outpatients with panic disorder were compared with 131 surgical outpatients on demographic variables and familial risk of psychiatric disorders. The distribution of patients' ages at onset of panic disorder and several covariates were entered in a stepwise survival analysis.
  
  
  RESULTS
  The patients with panic disorder had a significantly higher rate of childhood separation anxiety disorder and higher familial risks of panic disorder/panic disorder with agoraphobia and alcoholism. A family history of panic disorder with agoraphobia and the presence of childhood separation anxiety disorder influenced age at onset of panic disorder.
  
  
  CONCLUSIONS
  Age at onset of panic disorder may reflect genetic penetrance, and separation anxiety disorder may be an individual predictor of earlier onset of panic disorder.
authors.affiliation: Istituto Scientifico H. San Raffaele, Department of Neuropsychiatric Sciences, University of Milan School of Medicine, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Battaglia
authors.forename: S
authors.initials: S
authors.lastname: Bertella
authors.forename: E
authors.initials: E
authors.lastname: Politi
authors.forename: L
authors.initials: L
authors.lastname: Bernardeschi
authors.forename: G
authors.initials: G
authors.lastname: Perna
authors.forename: A
authors.initials: A
authors.lastname: Gabriele
authors.forename: L
authors.initials: L
authors.lastname: Bellodi
mesh_terms: D000328:Adult; D017668:Age of Onset; D000379:Agoraphobia / Q000175:diagnosis / Q000453:epidemiology / Q000235:genetics; D000437:Alcoholism / Q000175:diagnosis / Q000453:epidemiology / Q000235:genetics; D001010:Anxiety, Separation / Q000175:diagnosis / Q000453:epidemiology* / Q000235:genetics; D002648:Child; D005190:Family; D005260:Female; D006801:Humans; D008297:Male; D016584:Panic Disorder / Q000175:diagnosis / Q000453:epidemiology / Q000235:genetics*; D012307:Risk Factors; D016019:Survival Analysis