rials. Control Clin Trials 7: 177–188.
- 9. Begg CB, Mazumdar M (1994) Operating characteristics of a rank correlation test for publication bias. Biometrics 50: 1088–1101.
- 10. Egger M, Davey Smith G, Schneider M, Minder C (1997) Bias in meta-analysis detected by a simple, graphical test. Br Med J 315: 629–634.
- 11. Dong B, Ge N, Liu G (2001) [Social economical status, behaviors and enviroment as the risk factors of tuberculosis in Chengdu China]. Zhonghua Liu Xing Bing Xue Za Zhi 22: 102–104.
- 12. Mishra VK, Retherford RD, Smith KR (1999) Cooking with biomass fuels increases the risk of tuberculosis. Natl Fam Health Surv Bull. pp. 1–4.
- 13. Malhotra P, Abrol A, Kaur V, Dhar S, Singh A, et al. (1996) Prevalence of tuberculosis in Kishtwar Tehsil of Jammu region in Jammu and Kashmir State. J Indian Med Assoc 94: 334–337.
- 14. Abal AT, Nair PC, Sugathan TN, Pawar S (2003) Influence of smoking on cutaneous delayed-type hypersensitivity reaction by tuberculin skin test. Respir Med 97: 672–675.
- 15. Soriano I, Soriano R (2003) Indoor air pollution and tuberculosis: A retrospective study. Glow 29: 14–17.
- 16. Crofton E, Crofton J (1963) Influence of smoking on mortality from various diseases in Scotland and in England and Wales. An analysis by cohorts. Br Med J 5366: 1161–1164.
- 17. Gutzwiller F, La Vecchia C, Levi F, Negri E, Wietlisbach V (1989) Smoking, prevalence of disease and health service utilization among the Swiss population. Rev Epidemiol Sante Publique 37: 137–142.
- 18. Hnizdo E, Murray J (1998) Risk of pulmonary tuberculosis relative to silicosis and exposure to silica dust in South African gold miners. Occup Environ Med 55: 496–502.
- 19. Jentoft HF, Omenaas E, Eide GE, Gulsvik A (2002) Tuberculin reactivity: Prevalence and predictors in BCG-vaccinated young Norwegian adults. Respir Med 96: 1033–1039.
- 20. Woo J, Chan HS, Hazlett CB, Ho SC, Chan R, et al. (1996) Tuberculosis among elderly Chinese in residential homes: Tuberculin reactivity and estimated prevalence. Gerontology 42: 155–162.
- 21. Kuemmerer JM, Comstock GW (1967) Sociologic concomitants of tuberculin sensitivity. Am Rev Respir Dis 96: 885–892.
- 22. Doll R, Peto R, Wheatley K, Gray R, Sutherland I (1994) Mortality in relation to smoking: 40 years' observations on male British doctors. Br Med J 309: 901–911.
- 23. Miguez-Burbano MJ, Burbano X, Ashkin D, Pitchenik A, Allan R, et al. (2003) Impact of tobacco use on the development of opportunistic respiratory infections in HIV seropositive patients on antiretroviral therapy. Addict Biol 8: 39–43.
- 24. Nisar M, Williams CS, Ashby D, Davies PD (1993) Tuberculin testing in residential homes for the elderly. Thorax 48: 1257–1260.
- 25. Al Kubaisy W, Al Dulayme A, Hashim DS (2003) Active tuberculosis among Iraqi schoolchildren with positive skin tests and their household contacts. East Mediterr Health J 9: 675–688.
- 26. Gupta RK, Gupta A, Jamwal DS, Suri SP (2002) A socio-epidemiological study of tuberculosis in a rural area. Jk Sci 4: 119–122.
- 27. Shah SA, Mujeeb SA, Mirza A, Nabi KG, Siddiqui Q (2003) Prevalence of pulmonary tuberculosis in Karachi juvenile jail, Pakistan. East Mediterr Health J 9: 667–674.
- 28. de March-Ayuela P, Rey-Duran R (1997) Passive smoking and risk of pulmonary tuberculosis in children. Int J Tuberc Lung Dis 1: 482–484.
- 29. Edwards JH (1957) Contribution of cigarette smoking to respiratory disease. Br J Prev Soc Med 11: 10–21.
- 30. den Boon S, van Lill SW, Borgdorff MW, Verver S, Bateman ED, et al. (2005) Association between smoking and tuberculosis infection: A population survey in a high tuberculosis incidence area. Thorax 60: 555–557.
- 31. Hussain H, Akhtar S, Nanan D (2003) Prevalence of and risk factors associated with Mycobacterium tuberculosis infection in prisoners, North West Frontier Province, Pakistan. Int J Epidemiol 32: 794–799.
- 32. Plant AJ, Watkins RE, Gushulak B, O'Rourke T, Jones W, et al. (2002) Predictors of tuberculin reactivity among prospective Vietnamese migrants: The effect of smoking. Epidemiol Infect 128: 37–45.
- 33. Solsona J, Cay