Table 3.

Multiple linear regression results for DLCO (5 s breath-hold)

N = 118	Unstandardized coefficients		Standardized coefficients		95% Confidence interval for beta		Collinearity statistics
	Beta	SE	Beta	t-statistic	Lower bound	Upper bound	Tolerance	VIF
Constant	2.02	7.93		0.26	− 13.7	17.7
Sex (0 = females; 1 = males)	8.40	0.96	0.60	8.77*	6.50	10.29	0.52	1.91
Race (0 = black; 1 = white	3.87	0.71	0.28	5.48*	2.5	5.3	0.95	1.05
Age2	− 0.002	0.00	− 0.23	− 4.44*	− 0.003	− 0.001	0.93	1.07
Height (cm)	0.14	0.049	0.19	2.78*	0.4	0.2	0.52	1.92

	Sum of squares	Df	Mean square	F	Sig.
ANOVA results
Regression	4209	4	1052	75	0.000
Residual	1587	113	14.05
Total	5796	117

^*t-statistic was statistically significant (p < 0.01); SE = standard error; Durbin–Watson Statistic = 2.08; Overall R² = 0.73; Standard error of the estimate (SEE) = 3.8 mL/min/mmHg. Sex, Race, Age², and Height, accounted for approximately 57%, 10%, 4%, and 2% of the total variance in the model. ANOVA results were rounded to the nearest whole number except for Residual Mean Square error, which was rounded to two decimal places