title: Facial clefting and psychiatric diseases: a follow-up of the Danish 1936-1987 Facial Cleft cohort.
abstract: OBJECTIVE
  This study assesses whether patients with facial cleft have an increased risk of psychiatric diseases.
  
  
  METHODS
  Through the Danish Facial Cleft Database, patients with facial cleft born between 1936 and 1987 in Denmark were identified, and the admission pattern for these patients with facial cleft was available for the period 1969 through 1993 through the Danish Psychiatric Central Registry.
  
  
  METHODS
  A total of 6,462 patients with facial cleft followed up for a total of 127,068 person-years. MAIN OUTCOME MEASURES Hospitalization for psychiatric diseases. The expected number of admissions for the cleft population was calculated by multiplication of the observed person-years with admission rates for Denmark stratified for sex, 1-year age group, and 1-year calendar period.
  
  
  RESULTS
  A total of 284 patients with facial cleft (4.4%) were hospitalized for psychiatric diseases. The relative risk of hospitalization was 1.65 (95% confidence interval 1.3 to 2.0) for patients with isolated cleft palate (CP) and 1.15 (95% confidence interval 0.99 to 1.29) for patients with cleft lip +/- cleft palate (CL[P]). The overall risk estimates were above unity for both CP and CL(P) in all major diagnosis groups, neurosis and autism (for CL[P]) being the only exceptions. The excess risk was not accounted for by patients with known associated anomalies/syndromes.
  
  
  CONCLUSIONS
  The risk of hospitalized mental disorders in general is increased in patients with CP but not to any substantial degree in patients with CL(P). Both groups had an increased risk of mental retardation and substance abuse, but the risk for schizophrenia or bipolar illness was not statistically significantly increased, compared with the background population. Further, our data provide no evidence that the psychosocial stressors associated with CL(P) and its treatment have any substantial impact on the risk for hospitalized mental illness.
authors.affiliation: Center for the Prevention of Congenital Malformations, Institute of Public Health, University of Southern Denmark, Odense, Denmark. KChristensen@health.sdu.dk
authors.forename: Kaare
authors.initials: K
authors.lastname: Christensen
authors.forename: Preben Bo
authors.initials: PB
authors.lastname: Mortensen
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002971:Cleft Lip / Q000150:complications* / Q000453:epidemiology; D002972:Cleft Palate / Q000150:complications* / Q000453:epidemiology; D016208:Databases, Factual; D003718:Denmark / Q000453:epidemiology; D005260:Female; D006760:Hospitalization / Q000706:statistics & numerical data; D006801:Humans; D008607:Intellectual Disability / Q000150:complications / Q000453:epidemiology; D008297:Male; D001523:Mental Disorders / Q000150:complications* / Q000453:epidemiology; D008875:Middle Aged; D011618:Psychotic Disorders / Q000150:complications / Q000453:epidemiology; D012306:Risk; D013315:Stress, Psychological / Q000209:etiology; D019966:Substance-Related Disorders / Q000150:complications / Q000453:epidemiology