Marital status was categorized into married, widowed/divorced/separated/living with a partner, and never married. Health insurance was coded as to whether participants had insurance or not. Smoking status was categorized into current, former, and never smokers based on the question “Do you smoke ...
NHANES is a nationwide survey of the non-institutionalized civilian population in the United States, designed to assess the health and nutrition status of adults and children. It was conducted by the National Center for Health Statistics (NCHS) at the Centers for Disease Control and Prevention (CD...