Transformation of Physical DVHs to Radiobiologically Equivalent Ones in Hypofractionated Radiotherapy Analyzing Dosimetric and Clinical Parameters: A Practical Approach for Routine Clinical Practice in Radiation Oncology

Table 3

Spearman’s rho nonparametric test for the correlation between 𝐷₅₀ (Gy), 𝑉₆₀ (%), and acute rectal toxicity according to RTOG/EORTC criteria.

Spearman ρ	𝑉60 (𝛼/𝛽=10 Gy)	RTOG
𝐷50 (𝛼/𝛽=10 Gy)	rho = 0.408; 𝑃=0.003	rho = 0.514; 𝑃<0.001
𝑉60 (𝛼/𝛽=10 Gy)		rho = 0.469; 𝑃=0.001