title: A case-control study of BCG and childhood tuberculosis in Cali, Colombia.
abstract: We conducted a case-control study to evaluate the effectiveness of BCG vaccination in preventing childhood tuberculosis (TB) in Cali, Colombia. We ascertained 178 cases aged 0 to 14 years from the respiratory clinics with cough or fever for at least three weeks and a positive chest X-ray for TB, as well as 320 controls who were from the same households but had no symptoms and negative X-rays. Using matched set multiple logistic regression analysis, we found the age- and sex-adjusted relative risk (RR) of TB among vaccinees compared with non-vaccinees to be 0.84 with 95% confidence limits (CL) from 0.43 to 1.62. There was, however, a significantly lowered relative risk of TB with increasing time since vaccination (RR = 0.83 per year since time of vaccination with 95% CL from 0.74 to 0.94.)
mesh_terms: D000293:Adolescent; D001500:BCG Vaccine; D002648:Child; D002675:Child, Preschool; D003105:Colombia; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D012306:Risk; D013997:Time Factors; D014397:Tuberculosis, Pulmonary / Q000453:epidemiology / Q000517:prevention & control*
chemical_list: D001500:BCG Vaccine