title: Characteristics of patients with delayed diagnosis of infectious pulmonary tuberculosis.
abstract: OBJECTIVE
  The aim of this study was to identify patient and disease characteristics associated with delayed diagnosis of infectious pulmonary tuberculosis (TB).
  
  
  METHODS
  A retrospective analysis of 375 adult patients with culture-positive pulmonary TB and cough, treated at the Singapore Tuberculosis Control Unit (TBCU) in 2000, was carried out using data extracted from the TB notification registry and clinical records of the TBCU. Demographic, social, clinical and disease characteristics of patients with reported cough of duration less than, and exceeding, the median duration for the study population were compared.
  
  
  RESULTS
  The median duration of cough reported at TB notification was 4 weeks (range, 1-156 weeks). By multivariate analysis, patients with cough > 4 weeks were more likely to be < 65 years old (adjusted odds ratio (OR), 1.8; 95% CI, 1.1-2.9; P = 0.02), of Chinese ethnicity (adjusted OR, 2.0; 95% CI, 1.2-3; P = 0.004), more likely to be sputum acid-fast bacilli smear-positive (adjusted OR, 1.7; 95% CI, 1.1-2.7; P = 0.016), and to have weight loss (adjusted OR, 2.6; 95% CI, 1.7-4; P < 0.01).
  
  
  CONCLUSIONS
  Further studies are needed to identify the possible reasons for delayed diagnosis of TB among those < 65 years old, in the Chinese population in Singapore.
authors.affiliation: Department of Respiratory Medicine and Tuberculosis Control Unit, Tan Tock Seng Hospital, Singapore.
authors.forename: Lee-Lan
authors.initials: LL
authors.lastname: Phoa
authors.forename: Monica D
authors.initials: MD
authors.lastname: Teleman
authors.forename: Yee-Tang
authors.initials: YT
authors.lastname: Wang
authors.forename: Cynthia B E
authors.initials: CB
authors.lastname: Chee
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D003937:Diagnosis, Differential; D004651:Employment; D005260:Female; D006801:Humans; D008019:Life Style; D008297:Male; D017533:Marital Status; D008875:Middle Aged; D015999:Multivariate Analysis; D009169:Mycobacterium tuberculosis / Q000302:isolation & purification; D012189:Retrospective Studies; D012737:Sex Factors; D012846:Singapore / Q000453:epidemiology; D012959:Socioeconomic Factors; D013183:Sputum / Q000382:microbiology; D013997:Time Factors; D014397:Tuberculosis, Pulmonary / Q000175:diagnosis* / Q000208:ethnology / Q000382:microbiology