Trends in frequency of e-cigarette use among cancer patients and survivors in the United States, 2014–2018

•We report current e-cigarette usage in cancer survivors with history of usage.•The majority (76.7%) of cancer survivors were not actively using e-cigarettes.•Only 9.5% and 13.9% of cancer survivors used e-cigarettes every day or someday.•Traditional cigarette users had higher odds of active e-cigarette usage. Electronic cigarettes (e-cigarettes) have become increasingly popular in the United States, including among cancer survivors; however, the majority of prior studies do not report frequency of active e-cigarette usage. Using data from the National Health Interview Survey (2014–2018), frequency of active e-cigarette usage was estimated among cancer survivors reporting history of e-cigarette usage. Multivariable logistic regression analyses defined adjusted odds of active e-cigarette usage (either every day and some days vs. not at all) by year of survey and baseline demographic characteristics. Among 1529 cancer survivors who reported ever using e-cigarettes, 1172 (76.7%) were not active users, while 145 (9.5%) and 212 (13.9%) actively used e-cigarettes every day or some days, respectively. Later year of survey was negatively associated with active e-cigarette usage (p