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Table 4 Multiple linear regression results for alveolar volume (VA) (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

− 6.16

1.41

 

− 4.36*

− 9.0

− 3.4

  

Height (cm)

0.065

0.01

0.52

7.59*

0.05

0.08

0.55

1.83

Sex (0 = females; 1 = males)

0.835

0.17

0.34

5.02*

0.5

1.2

0.56

1.79

Race (0 = black; 1 = white

0.64

0.13

0.26

5.08*

0.39

0.90

0.96

1.04

 

Sum of squares

Df

Mean square

F

Sig.

   

ANOVA results

        

Regression

129

4

43

95

0.000

   

Residual

52

113

0.454

 

0.000

   

Total

181

117

      
  1. *t-statistic was statistically significant (p < 0.01); SE = standard error; Durbin–Watson Statistic = 2.38; Overall R2 = 0.71; Standard error of the estimate (SEE) = 0.67 L. Height, Sex, and Race accounted for approximately 60%, 6%, and 5% 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