title: Risk factors for preoperative anxiety in adults.
abstract: BACKGROUND
  Patients who undergo surgery experience acute psychological distress in the preoperative period. The objective of this study was to identify and quantify the effect of risk factors for preoperative anxiety in adults.
  
  
  METHODS
  A cross-sectional study was performed with 592 inpatients scheduled for elective surgery. Age ranged from 18 to 60 years (ASA physical status I-III). Demographic information was collected using a structured questionnaire. The measuring instruments were a visual analog scale, the State-Trait Anxiety Inventory; the Montgomery-Asberg Depression Rating Scale, the WHO Self-Reporting Questionnaire-20, and the future self-perception questionnaire. Multivariate conditional regression modeling was used to control confounding factors and to determine independent predictors of preoperative anxiety, taking into account the hierarchical relationship between risk factors.
  
  
  RESULTS
  High preoperative anxiety was associated with history of cancer (odds ratio (OR)=2.26) and smoking (OR=7.47), psychiatric disorders (OR=5.93), negative future perception (OR= 2.30), moderate to intense depressive symptoms (3.22), high trait-anxiety (3.83), moderate to intense pain (2.12), medium surgery (OR=1.52), female gender (OR=2.0), ASA category III (OR=3.41), up to 12 years of education (OR=1.36), and more than 12 years of education (OR=1.68). Previous surgery (OR= 0.61) was associated with lower risk for preoperative state-anxiety.
  
  
  CONCLUSIONS
  History of cancer and smoking, psychiatric disorders, negative future perception, moderate to intense depressive symptoms, high trait-anxiety, moderate to intense pain, medium surgery, female gender, ASA category III, up to 12 years of education and more than 12 years of education constituted independent risk factors for preoperative state-anxiety. Previous surgery reduced the risk for preoperative anxiety.
authors.affiliation: Anesthesia Service, Hospital de Clínicas de Porto Alegre, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Brazil.
authors.forename: W
authors.initials: W
authors.lastname: Caumo
authors.forename: A P
authors.initials: AP
authors.lastname: Schmidt
authors.forename: C N
authors.initials: CN
authors.lastname: Schneider
authors.forename: J
authors.initials: J
authors.lastname: Bergmann
authors.forename: C W
authors.initials: CW
authors.lastname: Iwamoto
authors.forename: D
authors.initials: D
authors.lastname: Bandeira
authors.forename: M B
authors.initials: MB
authors.lastname: Ferreira
mesh_terms: D000293:Adolescent; D000328:Adult; D001007:Anxiety / Q000453:epidemiology / Q000209:etiology*; D003430:Cross-Sectional Studies; D006801:Humans; D008875:Middle Aged; D015995:Prevalence; D012044:Regression Analysis; D012307:Risk Factors; D012907:Smoking / Q000009:adverse effects; D013514:Surgical Procedures, Operative / Q000523:psychology*