Predictor | Coefficient | SE | Odds ratio (95% CI) | p-value |
|---|
Intercept | -6.1 | 1.7 | Â | Â |
SUV95a | 0.40 | 0.13 | 1.5 (1.1-1.9) |
<0.0027
|
Ageb | 0.79 | 0.26 | 2.2 (1.3-3.7) |
<0.0026
|
V30 | 0.09 | 0.034 | 1.1 (1–1.2) |
<0.007
|
- aScaled by 10.
- bStandardized age was used with origin corresponding to the mean of 64.
- Note: SE = standard error of the estimated coefficient parameter; CI = confidence interval for the odds ratio; Stepwise backward model selection based on Akaike information criterion was used; Symptomatic radiation pneumonitis was conditionally independent of tumor location, stage, histology, smoking status, MLD, and RT modality in the presence of SUV95, V30, and age; p-values derived from two-sided hypothesis tests using Wald chi-square; significant partial effects suggest that the odds of symptomatic radiation pneumonitis increased with SUV95, V30, and age; Nagelkerke coefficient of multiple determination R2 = 0.32.
