Assessment of exposure to seconhand smoke in health surveys in Spain La valoración de la exposición al humo ambiental de tabaco en las encuestas de salud de España

Objective: To describe the questions used to assess exposure to secondhand smoke (SHS) in Spanish health surveys. Method: Extraction and analysis of the literals of the questions on SHS in the health surveys in Spain identified on the website of the Ministry of Health, the National Plan on Drugs and Health Departments of the autonomous communities. Results: Three nationwide surveys assessed SHS exposure, with variability in questions, responses, and recall periods. Catalonia in 2022, and Galicia and the Basque Country in 2018, assessed exposure in detail. Conclusions: Questions assessing self-reported exposure to SHS are survey-dependent. There is a need for a set of questions to assess exposure in a homogeneous way in health surveys.