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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