Table 1.

Patient‐ and treatment‐related characteristics for the complete patient cohort.

	Mean	Interquartile range	Range
Age (yr)	58	47–66	24–84
Tumor volume at treatment (cm3)	6.54	3.10–6.04	1.44–18.72
Dose to 99% of the tumor volume (Gy)	12.36	11.80–13.00	11.10–13.20
Coverage (%)	95.74	91.00–99.00	86.00–100.00
Selectivity	0.89	0.85–0.90	0.71–0.99
Gradient index	2.74	2.58–2.82	2.45–3.60
Paddick conformity index	0.84	0.84–0.89	0.17–0.93
Number of iso‐centers	24	17–31	1–53
Beam‐on time (min)	60.27	42.18–75.03	22.80–144.80