Are patients truthful about their smoking habits? A validation of self‐report about smoking cessation with biochemical markers of smoking activity amongst patients with ischaemic heart disease

Abstract

Most patients with coronary artery disease relating information concerning cessation of smoking are truthful. A few patients, however, seem to conceal their smoking. Testing by chemical markers may be questionable for ordinary care but should, however, be included in studies concerning the association between smoking and health.