title: Hypochondriasis Y-BOCS: a study of the psychometric properties of a clinician-administered semi-structured interview to assess hypochondriacal thoughts and behaviours.
abstract: BACKGROUND
  This study investigated the psychometric properties of the first clinician-administered semi-structured interview for assessing the severity of hypochondriacal symptoms. The Hypochondriasis Yale-Brown Obsessive-Compulsive Scale (H-YBOCS) consisted of three a priori dimensions: hypochondriacal obsessions, compulsions and avoidance.
  
  
  METHODS
  The 16-item interview was conducted with 112 participants with Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, hypochondriasis. We analysed factor analytic structure, reliability, construct validity and sensitivity to change.
  
  
  RESULTS
  Factor analysis supported a three-factor model similar to the a priori dimensions. Internal consistency ranged from satisfactory to good. Inter-rater reliability was excellent. The construct validity was low to moderate. The H-YBOCS was sensitive for measuring changes in symptom severity.
  
  
  CONCLUSIONS
  The H-YBOCS is a (factorially) valid and coherent interview with a high level of agreement across different raters. The relatively low discriminant validity could be due to co-morbid anxiety and depressive disorders. Overall, the H-YBOCS seems to be a promising contribution to the assessment of hypochondriasis.
  
  
  CONCLUSIONS
  *The hypochondriasis Y-BOCS is a feasible clinician rated interview to assess the severity of hypochondriacal complaints.
authors.affiliation: Department of Clinical and Health Psychology, Leiden University, Leiden, the Netherlands. greeven@fsw.leidenuniv.nl
authors.forename: Anja
authors.initials: A
authors.lastname: Greeven
authors.forename: Philip
authors.initials: P
authors.lastname: Spinhoven
authors.forename: Anton J L M
authors.initials: AJ
authors.lastname: van Balkom
mesh_terms: D000328:Adult; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D006998:Hypochondriasis / Q000150:complications / Q000175:diagnosis* / Q000523:psychology; D007406:Interview, Psychological / Q000379:methods*; D008297:Male; D009771:Obsessive-Compulsive Disorder / Q000150:complications / Q000175:diagnosis / Q000523:psychology; D010555:Personality Inventory / Q000706:statistics & numerical data; D011569:Psychiatric Status Rating Scales / Q000706:statistics & numerical data; D011594:Psychometrics; D012680:Sensitivity and Specificity; D012720:Severity of Illness Index