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Table 3 Multiple linear regression results for DLCO (5 s breath-hold)

From: The need for race-specific reference equations for pulmonary diffusing capacity for nitric oxide

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       
  1. *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