Table 3:

Relative Hazard of Incident Asthma by Depressive Symptom Status (n = 3,614)

	Relative Hazard (95% CI)	P Value
Unadjusted model
Baseline depressive symptom status	1.47 (1.20–1.81)	0.0002
Multivariable model
Baseline depressive symptom status, adjusted	1.26 (1.02–1.56)	0.03
Age, 4 yr*	0.97 (0.87–1.07)	0.52
Female	1.93 (1.55–2.41)	<0.0001
White	0.95 (0.76–1.18)	0.62
Study center
Birmingham	Ref.
Chicago	1.11 (0.83–1.50)	0.49
Minneapolis	1.18 (0.88–1.57)	0.27
Oakland	1.30 (0.99–1.72)	0.06
Smoking status
Never-smoker	Ref.
Former smoker	1.18 (0.94–1.49)	0.41
Current smoker	1.23 (0.85–1.50)	0.15
BMI
<25	Ref.
25–29	1.19 (0.95–1.50)	0.14
30+	1.41 (1.10–1.81)	0.01
Education
<High school	Ref.
High school	0.74 (0.51–1.09)	0.13
Some college	0.64 (0.43–0.95)	0.03
College or more	0.66 (0.44–0.99)	0.05
Physical activity score, 299 exercise units*	0.999 (0.90–1.11)	0.99

Definition of abbreviations: BMI = body mass index; CI = confidence interval.

^*One SD.