Online survey on couple-level concordance of various health behaviors and vaccination attitudes among the US adult population

This cross-sectional online study has three aims:
(1) To assess the couple-level concordance of various health behaviors, specifically, tobacco use, vaccination, physical exercise, and vegetable consumption, and their relationship to the length of the relationship and sociodemographic variables among US cohabiting adults;
(2) To assess the association between indoor smoking ban and vaping ban and tobacco and nicotine use, as well as the relationship of these with sociodemographic variables in cohabiting couples in the US;
(3) to assess the relationship between vaccination attitudes, social norms, and epistemic trust in a general US adult population.