Passive smoking raises the risk of periodontal disease for nonsmoking men by about 3.1 to 3.6 times, compared with men in smoke-free environments, according to a survey by Japanese researchers.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/passive-smoking-triples-men%E2%80%99s-gum-disease-risk-survey
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/japan-times-japan
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/smoking
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/tobacco
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/japan
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/diseases