Trend in Prevalence of Smoking and Motivation to Quit among Korean Adult Male Cancer Survivors over the Last 8 Years: The Korea National Health and Nutrition Examination Survey V-VII (2010-2017).

BACKGROUND This study aimed to investigate trends in the prevalence of current smokers and motivation to quit among Korean male cancer survivors. METHODS Out of 20,012 men who participated in the Korea National Health and Nutrition Examination Survey V (2010-2012), VI (2013-2015), and VII (2016-2017), 742 cancer survivors were included. A cancer survivor was defined as a person who concurred to the item, "The cancer has been diagnosed by a doctor" in the health questionnaire. Smoking status was classified as current, former, and never smokers. Regarding motivation to quit smoking, we defined those who had a willingness to quit within 6 months as the willing group. Logistic regression analysis was conducted to examine trends in the prevalence of current smokers and the proportion of the willing group among current smokers. RESULTS Overall, 3.7% of Korean men who participated in the study were cancer survivors. Current smokers constituted 19.5%, 19.1%, and 15.3% of cancer survivors in phases V, VI, and VII respectively which did not show significant changes (P for trend=0.33). However, the proportion of current smokers in the non-cancer group was significantly reduced to 46.6%, 41.2%, and 38.9% in phases V, VI, and VII, respectively (P for trend <0.001). The proportion of those with a motivation to quit smoking did not show a significant trend in the cancer survivors (P for trend=0.964) and non-cancer group (P for trend=0.884). CONCLUSION Prevalence of current smokers and motivation to quit in Korean male cancer survivors did not show significant trends.