Nondisclosure of smoking status to health care providers among current and former smokers in the United States.

An unintended consequence of tobacco control's success in marginalizing smoking is that smokers may conceal their smoking from those who are best positioned to help them quit: health care providers (HCPs). The purpose of this study was to identify the prevalence of, and factors related to, nondisclosure of smoking to HCPs. Data were obtained from a cross-sectional survey of adults from a nationally representative Knowledge Networks online panel in March to April 2011.