Int. J. Environ. Res. Public Health 2011, 8 432 14. Siahpush, M.; McNeill, A.; Hammond, D.; Fong, G.T. Socioeconomic and country variations in knowledge of health risks of tobacco smoking and toxic constituents of smoke: Results from the 2002 International Tobacco Control (ITC) Four Country Survey. Tob. Control 2006, 15, iii65-iii70. 15. Siahpush, M.; McNeill, A.; Borland, R.; Fong, G.T. Socioeconomic variations in nicotine dependence, self-efficacy, and intention to quit across four countries: findings from the International Tobacco Control (ITC) Four Country Survey. Tob. Control 2006, 15, iii71-iii75. 16. Marsh, A.; McKay, S. Poor Smokers; Policy Studies Institute: London, UK, 1994. 17. Nelson, D.E.; Emont, S.L.; Brackbill, R.M.; Cameron, L.L.; Peddicord, J.; Fiore, M.C. Cigarette smoking prevalence by occupation in the United States. A comparison between 1978 to 1980 and 1987 to 1990. J. Occup. Med. 1994, 36, 516-525. 18. White, V.; Hill, D.; Siahpush, M.; Bobevski, I. How has the prevalence of cigarette smoking changed among Australian adults? Trends in smoking prevalence between 1980 and 2001. Tob. Control 2003, 12, 67-74. 19. Hart, C.L.; Hole, D.J.; Gillis, C.R.; Smith, G.D.; Watt, G.C.; Hawthorne, V.M. Social class differences in lung cancer mortality: Risk factor explanations using two Scottish cohort studies. Int. J. Epidemiol. 2001, 30, 268-274. 20. Jha, P.; Peto, R.; Zatonski, W.; Boreham, J.; Jarvis, M.J.; Lopez, A.D. Social inequalities in male mortality, and in male mortality from smoking: Indirect estimation from national death rates in England and Wales, Poland, and North America. Lancet 2006, 368, 367-370. 21. Mackenbach, J.P.; Stirbu, I.; Roskam, A.J.; Schaap, M.M.; Menvielle, G.; Leinsalu, M.; Kunst, A.E. Socioeconomic inequalities in health in 22 European countries. N Engl. J. Med. 2008, 358, 2468-2481. 22. Layte, R.; Whelan, C.T. Explaining social class inequalities in smoking: The role of education, self-efficacy, and deprivation. Eur. Sociol. Rev. 2009, 25, 399-410. 23. Moussa, K.; Lindström, M.; Ostergren, P.O. Socioeconomic and demographic differences in exposure to environmental tobacco smoke at work: The Scania Public Health Survey 2000. Scand. J. Public Health 2004, 32, 194-202. 24. Edwards, R.; Hasselholdt, C.P.; Hargreaves, K.; Probert, C.; Holford, R.; Hart, J.; van Tongeren, M.; Watson, A.F. Levels of second hand smoke in pubs and bars by deprivation and food-serving status: a cross-sectional study from North West England. BMC Public Health 2006, 6, 42. 25. Moore, R.S.; Lee, J.P.; Antin, T.M.; Martin, S.E. Tobacco free workplace policies and low socioeconomic status female bartenders in San Francisco. J. Epidemiol. Community Health 2006, 60, ii51-ii56. 26. Shavers, V.L.; Fagan, P.; Alexander, L.A.; Clayton, R.; Doucet, J.; Baezconde-Garbanati, L. Workplace and home smoking restrictions and racial/ethnic variation in the prevalence and intensity of current cigarette smoking among women by poverty status, TUS-CPS 1998–1999 and 2001–2002. J. Epidemiol. Community Health 2006, 60, 34-43. 27. Eadie, D.; Heim, D.; MacAskill, S.; Ross, A.; Hastings, G.A. A qualitative analysis of compliance with smoke-free legislation in community bars in Scotland; implications for public health. Addiction 2008, 103, 1019-1026.