title: Erectile dysfunction and correlated factors in Brazilian men aged 18-40 years.
abstract: BACKGROUND
  Few population-based studies in erectile dysfunction (ED) included subjects less than 40 years old and analyzed the several factors and consequences potentially associated with this condition.
  
  
  OBJECTIVE
  Evaluation of the prevalence of erectile dysfunction (ED) and associated factors in a sample of Brazilian men aged 18 to 40 years old.
  
  
  METHODS
  Cross-sectional study in which subjects were contacted in public places of 18 major Brazilian cities and interviewed using an anonymous questionnaire. Survey data were submitted to chi-squared, student's t-test and logistic regression analyses.
  
  
  METHODS
  The data were collected by means of a self-administered questionnaire with 87 questions about sociodemographic variables, general health, habits and lifestyle-related factors, sexual behavior and sexual difficulties, including ED which was assessed by a single question.
  
  
  RESULTS
  Prevalence of ED in 1,947 men was 35.0% (73.7% mild, 26.3% moderate/complete). Greater frequency of ED was seen in subjects that never had information about sex, experienced difficulties in the beginning of sexual life and have never masturbated. ED was associated to lower level of education, but not to race, sexual orientation, employment or marital status. Also, no association was found between ED and smoking, alcoholism, obesity, sedentary life, diabetes, hypertension, cardiovascular disease, hyperlipidemia, depression or anxiety. ED caused negative impact in men's self-esteem, interpersonal relationships, work and leisure activities, and in sexual life satisfaction. Less than 10% of men with ED had received medical treatment for this problem.
  
  
  CONCLUSIONS
  Prevalence of ED in this young population was high, mostly of mild severity. Low education and psychosocial problems were associated to ED and, due probably to the sample subjects' young age, no association was found with organic problems. Measures in the fields of education and psychosocial difficulties prevention would have a positive impact in the control of erectile dysfunction in the young population.
authors.affiliation: Experimental Physiopathology Division, University of Sao Paulo Medical School, Sao Paulo, Brazil. Electronic address: martinsfg@uol.com.br.
authors.forename: Fernando Gonini
authors.initials: FG
authors.lastname: Martins
authors.affiliation: Psychiatry Department, University of Sao Paulo Medical School, Sao Paulo, Brazil.
authors.forename: Carmita Helena Najjar
authors.initials: CHN
authors.lastname: Abdo
mesh_terms: D000293:Adolescent; D000328:Adult; D001938:Brazil; D003431:Cross-Cultural Comparison; D003430:Cross-Sectional Studies; D004522:Educational Status; D007172:Erectile Dysfunction / Q000453:epidemiology* / Q000209:etiology; D006306:Health Surveys; D006801:Humans; D008297:Male; D012307:Risk Factors; D012917:Social Adjustment; D012959:Socioeconomic Factors; D013223:Statistics as Topic; D011795:Surveys and Questionnaires; D055815:Young Adult