Table 2.

Mean ± standard deviation (P value) dose metrics for each planning approach

	PTV Dmax (% of Rx)	PTV V95%	Conformity index	Gradient index	OAR Dmax (% of Rx)	OAR Dmean (% of Rx)
CSABR	128 ± 11	0.94 ± 0.05	0.74 ± 0.08	4.47 ± 0.63	73 ± 27	11 ± 8
RSABR	133 ± 8 (P = .21)	0.95 ± 0.04 (P = .21)	0.81 ± 0.04 (P < .001)	5.06 ± 0.38 (P = .02)	73 ± 33 (P = .89)	9 ± 8 (P = .001)
BgRT	150 ± 13 (P < .001)	0.95 ± 0.03 (P = .16)	0.72 ± 0.08 (P = .06)	5.40 ± 0.83 (P = .003)	77 ± 35 (P = .06)	10 ± 8 (P = .02)

Abbreviations: BgRT = biology-guided radiation therapy; CSABR = clinical stereotactic ablative radiation therapy; OAR = organs at risk; PTV = planning target volume; RSABR = research stereotactic ablative radiation therapy; Rx = prescription.

P values are results of post hoc paired t tests comparing RSABR and BgRT to CSABR.