Statistical analysis
HT
REGRESSION
The clinicopathological characteristics, hematological indicators, and dosimetric parameters were evaluated by t-test or Chi-squared test or Fisher’s exact test, when appropriate. Univariate (UVA) and multivariate (MVA) logistic regression was performed to identify dosimetric variables associated with the development of Grade3 + HT. Spearman correlation analysis was used to test correlations between dosimetric variables and absolute blood cell nadirs. Receiver Operating Characteristic (ROC) curves with the Youden method were used to identify the optimal dose-volume thresholds of predictive dosimetric parameters and to evaluate the predictive efficiency of the cutoff value both in the training cohort and the external validation cohort.All statistical analyses were performed with SPSS software 23.0, and 