Table 4: Logistic regression model 2 statistics.

Goodness of Fit Statistics

 

Observations

-2 Log (Likelihood)

R2 (McFadden)

AIC

SBC

Interpretation

 

33

17.595

0.593

49.595

73.539

The model accounts for 59% of the variation in breath acetone. It is an adequate fit of the model and has more complexity with a higher SBC than Model 1.

 

Type II Analysis

Chi-Square (LR) | Pr > LR

 

Dependent Variable

Body Fat (%)

Visceral Level

BMI (kg/m2)

Skeletal Muscle (%)

Position

Interpretation

Breath Acetone (Higher/Lower than sample mean 9.95 ppm)

1.427 | 0.232

2.134 | 0.144

0.866 | 0.352

0.408 | 0.523

22.031 | 0.024

The position variable accounts for most of the predictive value in this model and different positions have a statistically significant impact on the likelihood of the outcome.