2.2. Health Behaviors and Obesity. There were three outcome
variables. Physical exercise was assessed by a single question:
“how many times a week on average do you work up a
sweat (at least 20min per session, e.g., fast walking, jogging,
bicycling, swimming, rowing, etc.)?” Response categories
were none; some but less than once a week; 1–3 times per
week;more than 3 times perweek. Physical inactivity (yes/no)
was defined as “none” versus any. Smoking was categorized
as current, former, or never. Body mass index (BMI) was
computed from self-reported weight and height; “obese” was
defined as BMI of 30.0 or above.