Skip to main content

Table 2 Multiple linear regression results for DLNO (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 − 1.69 39.67   − 0.043 − 80.3 76.9   
Sex (0 = females; 1 = males) 40.97 4.79 0.59 8.55* 31.5 50.5 0.52 1.91
Age2 − 0.013 0.002 − 0.27 − 5.27* − 0.018 − 0.008 0.93 1.07
Race (0 = black; 1 = white 12.44 3.54 0.18 3.52* 5.4 19.4 0.95 1.05
Height (cm) 0.78 0.245 0.22 3.17* 0.3 1.3 0.52 1.92
  Sum of squares Df Mean square F Sig.    
ANOVA results         
Regression 103,381 4 25,845 74 0.000    
Residual 39,759 113 351.85      
Total 143,139 117       
  1. *t-statistic was statistically significant (p < 0.01); SE = standard error; Durbin–Watson Statistic = 1.92; Overall R2 = 0.72; Standard error of the estimate (SEE) = 18.8 mL/min/mmHg. Sex, Age2, Race, and Height, accounted for approximately 60%, 6%, 5%, and 3% 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