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. Author manuscript; available in PMC: 2013 Dec 5.
Published in final edited form as: J Vet Intern Med. 2010 May 11;24(4):10.1111/j.1939-1676.2010.0530.x. doi: 10.1111/j.1939-1676.2010.0530.x

Table 2.

Rates of exposure to environmental tobacco smoke (ETS) of coughing and control dogs and prevalence of smoking among adults in North Carolina for the years 2000-2004 and 2004–2009.

Years Exposure to
ETS among
coughing
dogs (%)		 Exposure to
ETS among
control
dogs (%)		 Smoking
prevalence
in NC
(%)a 		P value
coughing
vs
control
dogs		 P value
coughing
dogs vs
smoking
prevalence		 P value
control
dogs vs
smoking
prevalence
2000–2009 47/114 (41.2) 26/109 (23.9) 23.9 nd 0.004 0.99
2000–2004 28/55 (50.9) nd 25.3 nd <0.001 nd
2005–2009 19/59 (32.2) 26/109 (23.9) 22.2 0.243 0.060 0.68

nd, not determined;

a

Through 2008. From: CDC. State-specific prevalence and trends in adult cigarette smoking-United States, 2998–2007. MMWR 2009;58:221–226 and CDC. State-specific secondhand smoke exposure and current cigarette smoking among adults-United States, 2008. MMWR 2009;58:1232–1235.