Table 1.

List of variables studied

Name	Explanation	% of asthmatics (N = 723)	% of nonasthmatics (N = 7795)
Outcome variable
Disability day	Total two-week disability days
Main studied variable
Asthma	Self-reported having an asthma diagnosis	100.0	0.0
Other health conditions
Allergy	Self-reported having an allergy diagnosis	66.8	28.0
Smoke	Self-reported having smoked 100 or more cigarettes	53.0	53.5
Injury	Self-reported having at least one injury last year	30.2	23.5
Hospitalization	Self-reported having at least one hospitalization last year	11.9	8.4
Poor health	Self-perceived health as poor	5.1	2.1
Other, chronic	Self-reported having at least another chronic condition (other than allergy)	21.4	36.5
Sociodemographic characteristics
Male	Sex	38.6	48.8
Age group 1	18–19 years old	6.2	4.4
Age group 2	20–24 years old	12.9	9.9
Age group 3	25–29 years old	13.7	12.2
Age group 4	30–34 years old	12.5	11.9
Age group 5	35–39 years old	11.3	11.3
Age group 6	40–44 years old	7.9	12.0
Age group 7	45–49 years old	8.9	10.0
Age group 8	50–54 years old	9.7	10.8
Age group 9	55–59 years old	8.9	9.6
Age group 10	60–64 years old (used as the reference in the model)	8.2	8.0
Married	Marital status	41.9	50.0
Job	Had a job last week	78.7	79.2
Poor	Household income is less than $15,000	6.1	5.1