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Comparison of the NTCP models using the Akaike information criterion (AIC value). n denotes the number of model parameters. [*model not significant (p>0.05)]
| Model | n | LL | AIC |
|---|---|---|---|
| Lyman-EUD model | 3 | -134.54 | 275.1 |
| Logit-EUD model | 3 | -134.51 | 275.0 |
| serialRU model | 2 | -134.53 | 273.1 |
| Poisson-EUD model | 2 | -134.55 | 273.1 |
| mean dose model | 2 | -138.89* | —* |
| cutoff dose model (73.7 Gy) | 3 | -136.08 | 278.2 |
| cutoff dose model (79.6 Gy) | 3 | -135.34 | 276.7 |
