title: A case-control study of tobacco smoking and tuberculosis in India.
abstract: OBJECTIVE
  To evaluate the role of smoking as a risk factor for the development of pulmonary tuberculosis.
  
  
  METHODS
  A total of 111 sputum smear-positive patients of pulmonary tuberculosis and 333 controls matched for age and sex were interviewed according to a predesigned questionnaire.
  
  
  RESULTS
  The adjusted odd ratio of the association between tobacco smoking and pulmonary tuberculosis was 3.8 (95% confidence interval, 2.0 to 7.0; P value, < 0001). A positive relationship between pack years, body mass index and socioeconomic class was also observed.
  
  
  CONCLUSIONS
  There is a positive association between tobacco smoking and pulmonary tuberculosis.
authors.affiliation: Department of Pulmonary Medicine, Chhatrapati Sahuji Maharaj Medical University (Erstwhile K. G. Medical University), Lucknow, India. rprasad2@rediffmail.com
authors.forename: R
authors.initials: R
authors.lastname: Prasad
authors.forename: R
authors.initials: R
authors.lastname: Garg
authors.forename: S
authors.initials: S
authors.lastname: Singhal
authors.forename: R
authors.initials: R
authors.lastname: Dawar
authors.forename: G G
authors.initials: GG
authors.lastname: Agarwal