Table 5.
Model development: stepwise regression with backward selection and the Akaike and Bayes information criteria (AIC/BIC)
| Steps | Model includes | AIC | BIC | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| age | multilocular | SA | BL | ascites | metastases | MS | CA125 | CS | PLT | DD | |||
| 0 - starting model | + | + | + | + | + | + | + | + | + | + | + | 107.6212 | 149.8325 |
| 1 - “age” removed | – | + | + | + | + | + | + | + | + | + | + | 105.8472 | 144.8115 |
| 2 - “metastases” removed | – | + | + | + | + | – | + | + | + | + | + | 104.7247 | 140.4419 |
| 3 - “ascites” removed | – | + | + | + | – | – | + | + | + | + | + | 103.1334 | 135.6037 |
| 4 - “mulilocular” removed | – | – | + | + | – | – | + | + | + | + | + | 102.1436 | 131.3668 |
| 5 - “PLT” removed | – | – | + | + | – | – | + | + | + | – | + | 101.5771 | 127.5533 |
| 6 - “MS” removed | – | – | + | + | – | – | – | + | + | – | + | 102.1847 | 121.6669 |
| 7 - “CA125” removed | – | – | + | + | – | – | – | – | + | – | + | – | 120.4145 |
| 8 - “BL” removed | – | – | + | – | – | – | – | – | + | – | + | – | 119.9821 |
| model: SA + CS | – | – | + | – | – | – | – | – | + | – | – | – | 167.4295 |
| model: SA + DD | – | – | + | – | – | – | – | – | – | – | + | – | 121.9826 |
| model: CS + DD | – | – | – | – | – | – | – | – | + | – | + | – | 148.0912 |
(+), included, (−) excluded, BL bilateral lesions, CS color score, DD D-dimer, MS menopausal status, PLT platelet count, SA solid areas