Dimension | Variables | Assignment |
---|---|---|
Smoking status | Have you smoked in the past 30 days? | Yes = 1; No = 0 |
Have you smoked in the car? | Yes = 1; No = 0 | |
Do you permit passengers to smoke in the car? | Yes = 1; No = 0 | |
Sociodemographic characteristics | Area of residence* | Eastern regions = 1; Central regions = 2; Western regions = 3 |
Gender | Male = 1; Female = 2 | |
Age | 18–34 years = 1; 35–44 years = 2; ≥45 years = 3 | |
Marital status | Married = 1; Unmarried = 2; Divorced/Widowed/Remarried/Others = 3 | |
Educational level | Junior high school and below = 1; Vocational/Technical secondary school/High school = 2; Junior college and above = 3 | |
The ratio of family burden†| Less than the gross dependency coefficient‡ = 1; Equal or more than the gross dependency coefficient = 2 | |
Job characteristics | Working years as a full-time driver | < 5 years = 1; 5–10 years = 2; ≥10 years = 3 |
Working hours per day | < 10 h = 1; 10–12 h = 2; ≥12 h = 3 | |
Period of work | Daytime = 1; Night = 2; Both daytime and night = 3; Non-fixed working time = 4 | |
Time spent per day outside the car to relax during work | < 5 min = 1; 5–10 min = 2; ≥10 min = 3 | |
Health-related factors | Health status | |
Experiences of chronic illness§ | Yes = 1; No = 0 | |
Self-reported health | Good = 1; General = 2; Poor = 3 | |
Feelings of anxiety | Never = 1; Occasionally = 2; Frequently = 3 | |
Weight status¶ | Underweight = 1; Normal = 2; Overweight = 3 | |
Health behaviour | ||
Drinking status | Current drinker = 1; Nondrinker = 0 | |
Eating habits | Extremely regular = 1; Regular in general = 2; Extremely irregular = 3 | |
Choice of place to eat | Mainly eating at home = 1; Mainly eating out = 2 | |
Sleep duration per day | < 6 h = 1; 6–8 h = 2; ≥8 h = 3 | |
The number of days in a week of engaging in at least 10 min of moderate or vigorous exercise | 0 day = 1; 1–2 days = 2; ≥3 days = 3 | |
Health literacy | ||
Level of the initiative to acquire health knowledge | Never = 1; Occasionally = 2; Frequently = 3 | |
Main approaches for acquiring health knowledge | Mobile phone; Television shows; Broadcast; Internet; Doctors; Newspapers; Families/Colleagues/Friends; Brochure or bulletin board; Others |