Table 1.

Variables and assignments of independent variables.

Self-assessment of health status	Good = 1, Average = 2, Bad = 3
Exercise intensity type	Vigorous-intensity = 1, Moderate-intensity = 2, Light-intensity = 3
Variables	Assignment
Gender	Male = 1, Female = 2
Age	60–64 = 1, 65–69 = 2, 70–74 = 3
BMI	Low weight = 1, Normal weight = 2, Overweight = 3, Obesity = 4
Comorbidity duration	Less than 6 years = 1, 6–10 years = 2, More than 10 years = 3
Household registration type	Urban registration = 1, Rural registration = 2
Education level	Junior high school and below = 1, High school/Polytechnic school = 2, Junior college = 3, College and above = 4
Per capita annual income	Less than 30,000 yuan = 1, 30,000–50,000 yuan = 2, More than 50,000 yuan = 3
Living conditions	Living alone = 1, Living with spouse = 2, Living with children = 3
Marital status	Married = 1, Widowed = 2, Separated/Divorced = 3
Will family members supervise exercise	Will = 1, Will not = 2
Whether respondents participates in social activities	Yes = 1, No = 2
Does respondents take health products	Yes = 1, No = 2
Can respondents have at least 6 h of sleep per day	Yes = 1, No = 2