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Table 2 Mean histogram feature comparison between GTVfailure and GTVresponder, with associated Wilcoxon signed-rank test p values

From: Voxel-based identification of local recurrence sub-regions from pre-treatment PET/CT for locally advanced head and neck cancers

Histogram Features GTVfailure GTVresponder p values
Minimum 2.79 ± 2.23 1.21 ± 0.38 0.031*
Maximum 14.53 ± 5.87 14.93 ± 6.68 0.747
Mean 7.37 ± 3.47 5.40 ± 1.90 0.007*
Variance 11.57 ± 11.28 13.71 ± 14.84 0.459
Skewness 0.13 ± 0.32 0.07 ± 0.10 0.517
Kurtosis 0.46 ± 0.95 0.28 ± 0.51 0.517
  1. GTVfailure: recurrence volume within the primary tumor, GTVresponder: responder volume within the primary tumor
  2. * Significant difference (p ≤ 0.05) between GTVfailure and GTVresponder