Prostate radiotherapy may cause fertility issues: a retrospective analysis of testicular dose following modern radiotherapy techniques

Table 1 Patients’ characteristics and technical data

	Median [IQR]	N
Age	74 [70–77]	100
Weight (kg)	78 [70–88.5]	60
BMI (kg/m²)	25.5 [23–28.8]	56
Technique (n (%))		100
VMAT	54
Tomotherapy	20
Stereotactic radiotherapy	26
Total physical dose to prostate (Gy)	78 [40–80]	100
Number of fractions	39 [5-39]	100
EQD2_1.5 to prostate (Gy)	80 [78–108.6]	100
Pelvic nodes irradiation		100
Yes	54
No	46
Testicular volume (cc)	54.8 [43–70]	100
Distance between inferior contour of CTV and testicle (mm)	51 [41–60]	100

IQR interquartile range, BMI body mass index, VMAT volumetric modulated arc-therapy, EQD2_1.5 equivalent dose in 2Gy fractions considering an α/β ratio of 1.5Gy, CTV clinical target volume

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