TABLE 3.

Lung Function as a Function of SES

	RRR (SE)	[95%CI]
Medium Lung Function (FEV1 85-99) vs. Low Lung Function (FEV1 <85)
SES variables
Father’s education1
Some college	7.22* (6.03)	1.40	37.10
College degree	8.12* (7.89)	1.21	54.57
Mother’s education1
Some college	0.81 (0.74)	0.14	4.82
College degree	0.29 (0.32)	0.03	2.51
Household income2
$50,000–100,000	0.96 (0.86)	0.16	5.59
>$100,000	4.63 (5.42)	0.47	45.96
Control variables
Adults in household	0.88 (0.51)	0.28	2.76
Smoking in household	0.51 (0.40)	0.11	2.38
Health insurance	0.58 (0.48)	0.11	2.98
Patient age	0.95 (0.09)	0.80	1.14
Depression	0.54 (0.44)	0.11	2.69
High Lung Function (FEV1 ≥100) vs. Low Lung Function (FEV1 <85)
SES variables
Father’s education1
Some college	0.77 (0.76)	0.11	5.34
College degree	0.60 (0.64)	0.07	4.94
Mother’s education1
Some college	0.54 (0.56)	0.07	4.07
College degree	0.57 (0.67)	0.06	5.72
Household income2
$50,000–100,000	2.18 (2.13)	0.32	14.85
>$100,000	13.09* (16.07)	1.18	145.30
Control variables
Adults in household	2.48 (1.47)	0.78	7.91
Smoking in household	0.15* (0.14)	0.02	0.97
Health insurance	0.45 (0.41)	0.07	2.70
Patient age	0.89 (0.09)	0.73	1.09
Depression	0.00 (0.00)	0.00

Results of the multinomial logistic regression model (Lung Function=SES+CVs+e) that tests Hypothesis 2: “Higher SES is associated with better respiratory outcomes.”

N=110; RRR, Relative risk ratio; SE, Standard error; CI, Confidence interval.

^*P<0.05; Likelihood ratio chi² (36)=150.46***.

¹Reference category is high-school degree or less.

²Reference category is <$50,000.