. Author manuscript; available in PMC: 2008 Feb 25.

Published in final edited form as: Inhal Toxicol. 2007 Nov;19(14):1147–1154. doi: 10.1080/08958370701665475

Table 3.

Relationship between age, body mass index and change in pulmonary function parameters after ozone exposure for all subjects and by gender. Beta is the coefficient for the associated predictor in the regression model and the square of the regression coefficient, R², applies to the regression model that includes both predictors, age and BMI.

		All (n = 197)		Males (n = 122)		Females (n = 75)
Δ (%)	Predictor	Beta	p-value	Beta	p-value	Beta	p-value
FEV1	Age	0.406	0.039	0.164	0.54	0.718	0.016
	BMI	−0.580	0.014	−0.533	0.11	−0.716	0.044
	R²	0.036		0.022		0.124

FVC	Age	0.343	0.028	0.147	0.47	0.582	0.019
	BMI	−0.288	0.038	−0.391	0.13	−0.563	0.057
	R²	0.041		0.021		0.116

FEF25-75^a	Age	0.375	0.212	0.083	0.84	0.724	0.098
	BMI	−0.952	0.008	−0.693	0.19	−1.336	0.012
	R²	0.040		0.015		0.116

FEV1/FVC	Age	0.103	0.350	0.063	0.68	0.169	0.29
	BMI	−0.259	0.050	−0.211	0.27	−0.224	0.25
	R²	0.022		0.011		0.033

FEF25-75/FVC^a	Age	0.171	0.524	0.037	0.92	0.316	0.41
	BMI	−0.732	0.023	−0.428	0.37	−1.025	0.028
	R²	0.027		0.007		0.074

n = 121 for males; n = 74 for females