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Epidemiology of tobacco use in Qatar: prevalence and its associated factors

Additional information available at Based on K6 scale, the degree of psychological distress is presented as a four-category measure with no psychological distress (score = 0), low psychological distress (score = 15), moderate psychological distress (score = 610), and high psychological distress (score = 1124) ( *** [(2005 estimate 2015 estimate)/2005 estimate] x 100

10.1016/j.amepre.2013.10.007 [DOI] [PMC free article] [PubMed] [Google Scholar] Chun LF, Moazed F, Calfee CS, Matthay MA, & Gotts JE (2017)

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