© 1985 Oxford University Press
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A Case-Control Study of BCG and Childhood Tuberculosis in Cali, Colombia
Channing Laboratory, Department of Medicine, Brigham and Woman's Hospital: the Departments of Preventive Medicine and Clinical Epidemiology and Social Medicine and Health Policy, Harvard Medical School; Department of Epidemiology, Harvard School of Public Health and the Universidad del Valle. Reprint requests to: Dr C H Hennekens, 55 Pond Ave, Brookline, MA 02146, USA, or to Dr R Guerrero, Universidad del Valle, Cali, Colombia.
Shapira C (Hard Medical school, Boston MA, USA), Cook N, Evans D, Willett W, Fajardo I, Koch-Eser D, Bergonzoli G. Bolanos O, R, uerrero and Charles H Hennekens C H. A case-control study of BCG and children tuberculosis in Cali, Colombia. Istituto Malattie Infettive, Università di Roma ‘La Sapienza’
Reprint requests to: Dr Claudio Galli, via Giuseppe Valmarana 107, 00139 Roma, Italy.
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 house-holds 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.)
Received 1 March 1985
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