Table 3.

Uni-variant linear regression analysis results of activeBM dose metrics and the relative reduction seen in volume of activeBM at mid-treatment.

Reduction in mean SUV
Input variable	Coefficient	95% CI	p-value
Baseline iliac SUV	−16.9	−44.6 to 10.7	0.199
V20 dose	−0.7	−1.2 to −0.1	0.026
Constant	42.2	−4.2 to 88.5	0.070
Baseline lumbo SUV	−18.5	−39.9 to 2.8	0.081
V20 dose	−0.3	−0.6 to −0.1	0.043
Constant	25.1	−5.6 to 55.7	0.097

Reduction in Volume of ActiveBM
Input variable	Coefficient	95% CI	p-value
Baseline iliac volume	−23.0	−114.8 to 68.7	0.584
V20 dose	−2.3	−4.2 to −0.5	0.017
Constant	107.7	−46.2 to 261.6	0.148
Baseline lumbo volume	−24.4	−69.0 to 20.1	0.246
V20 dose	−0.9	−1.5 to −0.3	0.011
Constant	40.7	−23.3 to 104.8	0.184

Abbreviations: BM = Bone Marrow; CI = Confidence Interval; SUV = Standard Uptake Value; V20 = Volume Receiving 20Gy.