L J Nelson1, Y Naik, K Tsering, J P Cegielski. 1. Division of Tuberculosis Elimination, Centers for Disease Control and Prevention, Atlanta, Georgia 30333, USA. lbn9@cdc.gov
Abstract
SETTING: Tibetan refugees in India, 1994-1996. OBJECTIVE: To determine tuberculosis (TB) incidence, independent risk factors for TB, and predictors of adverse outcomes. DESIGN: Data from a house-to-house census/demographic survey were merged with TB patient data. Separate multivariable models for each birthplace were developed for outcomes of interest. RESULTS: From 1994 to 1996, 47,491 Tibetans were surveyed and 1197 TB cases confirmed (incidence 835/ 100,000). Risk factors for TB in separate multivariable models differed by place of birth. Independent predictors of death for Tibet-born refugees included age >50 years, extra-pulmonary TB, and second-line therapy, while for India-born refugees they included second-line therapy and no improvement at the end of treatment. No significant risk factors for default were identified for Tibet-born refugees, while region of residence and the absence of a BCG scar were independent predictors among those born in India. Predictors of receipt of second-line therapy among Tibet-born refugees included region, years in camps, and prior TB, while among those born in India they were region, age > or =20 years, sputum-positive at diagnosis, and previous TB. CONCLUSIONS: TB incidence in Tibetan refugee settlements exceeds the highest national TB rates, and country of birth determines risk factors. TB control efforts in India should include this population.
SETTING: Tibetan refugees in India, 1994-1996. OBJECTIVE: To determine tuberculosis (TB) incidence, independent risk factors for TB, and predictors of adverse outcomes. DESIGN: Data from a house-to-house census/demographic survey were merged with TB patient data. Separate multivariable models for each birthplace were developed for outcomes of interest. RESULTS: From 1994 to 1996, 47,491 Tibetans were surveyed and 1197 TB cases confirmed (incidence 835/ 100,000). Risk factors for TB in separate multivariable models differed by place of birth. Independent predictors of death for Tibet-born refugees included age >50 years, extra-pulmonary TB, and second-line therapy, while for India-born refugees they included second-line therapy and no improvement at the end of treatment. No significant risk factors for default were identified for Tibet-born refugees, while region of residence and the absence of a BCG scar were independent predictors among those born in India. Predictors of receipt of second-line therapy among Tibet-born refugees included region, years in camps, and prior TB, while among those born in India they were region, age > or =20 years, sputum-positive at diagnosis, and previous TB. CONCLUSIONS: TB incidence in Tibetan refugee settlements exceeds the highest national TB rates, and country of birth determines risk factors. TB control efforts in India should include this population.
Authors: Amod K Pokhrel; Michael N Bates; Sharat C Verma; Hari S Joshi; Chandrashekhar T Sreeramareddy; Kirk R Smith Journal: Environ Health Perspect Date: 2010-04 Impact factor: 9.031
Authors: John E Oeltmann; Jay K Varma; Luis Ortega; Yecai Liu; Thomas O'Rourke; Maria Cano; Theresa Harrington; Sean Toney; Warren Jones; Samart Karuchit; Lois Diem; Dhanida Rienthong; Jordan W Tappero; Kashef Ijaz; Susan A Maloney Journal: Emerg Infect Dis Date: 2008-11 Impact factor: 6.883