title: Prevalence of pulmonary tuberculosis among respiratory symptomatic subjects in an out-patient primary health unit.
abstract: METHODS
  Out-patient primary health unit (OPHU) in Rio de Janeiro City, Brazil.
  
  
  OBJECTIVE
  To evaluate the impact on the detection of tuberculosis (TB) cases of reducing the time of respiratory symptoms from 'cough > or = 3 weeks' to 'cough > or = 1 week' as a criteria for TB case finding among individuals visiting an OPHU for any other reason.
  
  
  METHODS
  Cross-sectional study.
  
  
  RESULTS
  During the period of the study, 10.7% (765/ 7174) of subjects reported cough > or = 1 week. Among 542 subjects enrolled in the study with cough > or = 1 week, 15 (2.7%) cases were diagnosed with pulmonary tuberculosis (PTB, 2767/100000). The probability of detecting TB in the OPHU setting among subjects seeking care for respiratory symptoms was significantly higher than among those presenting to the OPHU for other reasons (OR 31.5, 95% CI 4.1-241.9; P < 0.0001). The probability of identifying TB among patients seeking care due to respiratory symptoms was not influenced by the duration of cough (P = 0.7).
  
  
  CONCLUSIONS
  These findings suggest that the screening criteria for TB case finding of cough for less than the usual 3 weeks among patients who attend a health facility due to respiratory symptoms in settings with a high prevalence of TB may significantly improve the proportion of TB cases diagnosed.
authors.affiliation: Instituto de Doenças do Tórax/Hospital Universitario Clementino Fraga Filho da Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
authors.forename: L G V
authors.initials: LG
authors.lastname: Bastos
authors.forename: L S
authors.initials: LS
authors.lastname: Fonseca
authors.forename: F C Q
authors.initials: FC
authors.lastname: Mello
authors.forename: A
authors.initials: A
authors.lastname: Ruffino-Netto
authors.forename: J E
authors.initials: JE
authors.lastname: Golub
authors.forename: J L
authors.initials: JL
authors.lastname: Golub
authors.forename: M B
authors.initials: MB
authors.lastname: Conde
mesh_terms: D000328:Adult; D000465:Algorithms; D000553:Ambulatory Care; D001938:Brazil / Q000453:epidemiology; D003371:Cough / Q000453:epidemiology*; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D016015:Logistic Models; D008297:Male; D015995:Prevalence; D011320:Primary Health Care / Q000706:statistics & numerical data; D013997:Time Factors; D014397:Tuberculosis, Pulmonary / Q000453:epidemiology*