Preoperative chemoradiation-induced hematological toxicity and related vertebral dosimetry evaluations in patients with locally advanced gastric cancer: data from a phase III clinical trial

Table 2 The vertebral body dosimetric parameters (mean ± SD)

Parameters	Training cohort (n = 113)	Validation cohort (n = 40)	P
VBV (cm³) Dmin (cGy) Dmax (cGy) Dmean (cGy) V₅ (%) V₁₀ (%) V₂₀ (%) V₃₀ (%) V₄₀ (%) V₄₅ (%)	131 ± 27.8 179.7 ± 78.7 4834.7 ± 158.6 2830.5 ± 313.3 85.3 ± 5.4 79.9 ± 5.7 71.9 ± 6.9 58.3 ± 10.7 26.4 ± 11.3 9.1 ± 6.5	120.6 ± 31.3 240.8 ± 81.3 4740.7 ± 140.7 2624.4 ± 338.4 87.3 ± 7.2 78.9 ± 5.4 67.8 ± 8.9 49.4 ± 13.0 17.4 ± 12.0 4.3 ± 5.7	0.264 0.368 0.307 0.358 0.832 0.943 0.367 0.049 0.562 0.121

SD, standard deviation; VBV, vertebral body volume; D_min, minimum dose; D_max, maximum dose; D_mean, mean dose; V_x, the volume percentage of dose receiving ≥ x Gy

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