title: Association of psychiatric disorders, asthma and lung function in early adulthood.
abstract: OBJECTIVE
  To examine the association between psychiatric disorders, asthma, and lung function in young adults.
  
  
  METHODS
  Data were from the Mater-University of Queensland Study of Pregnancy (MUSP). The study was based on 2443 young adults (1193 male and 1250 female) for whom data were available on psychiatric disorders, asthma, and respiratory function. Life time and last 12 months' generalized anxiety, panic, posttraumatic stress disorder (PTSD), and depressive disorders were assessed using a computerised version of the Composite International Diagnostic Interview (CIDI-Auto). A Spirobank G spirometer system was used to measure forced vital capacity (FVC), forced expiratory volume in one second (FEV(1)), and forced expiratory flow between 25% and 75% of forced vital capacity (FEF(25-75%)).
  
  
  RESULTS
  Participants with mental health disorders were more likely to have experienced asthma before or to use asthma medication at 21 years. However, for both males and females, life time and last 12 months' experience of generalized anxiety, panic, PTSD, and depressive disorders were not statistically significantly associated with FVC, FEV(1), and FEF(25-75%), except a modest association with major depressive disorders for males.
  
  
  CONCLUSIONS
  There is an association between mental health and asthma, but the relationship between mental health and lung function appeared to be confounded by the respondent's gender. More narrowly based prospective studies are required to determine the causal pathway between mental disorders and asthma.
authors.affiliation: School of Population Health, The University of Queensland, Herston Road,Herston, Queensland 4006, Australia. m.hayatbakhsh@uq.edu.au
authors.forename: Mohammad R
authors.initials: MR
authors.lastname: Hayatbakhsh
authors.forename: Jake M
authors.initials: JM
authors.lastname: Najman
authors.forename: Alexandra
authors.initials: A
authors.lastname: Clavarino
authors.forename: William
authors.initials: W
authors.lastname: Bor
authors.forename: Gail M
authors.initials: GM
authors.lastname: Williams
authors.forename: Michael J
authors.initials: MJ
authors.lastname: O'Callaghan
mesh_terms: D000293:Adolescent; D000328:Adult; D001249:Asthma / Q000453:epidemiology* / Q000503:physiopathology; D005260:Female; D005540:Forced Expiratory Flow Rates; D005541:Forced Expiratory Volume; D006801:Humans; D008168:Lung / Q000503:physiopathology*; D008297:Male; D001523:Mental Disorders / Q000150:complications*; D013313:Stress Disorders, Post-Traumatic / Q000150:complications; D014797:Vital Capacity; D055815:Young Adult