. Author manuscript; available in PMC: 2013 Jul 15.

Published in final edited form as: Int J Radiat Oncol Biol Phys. 2011 Dec 29;83(4):e487–e493. doi: 10.1016/j.ijrobp.2011.10.021

Table 4.

Binary logistic regression analysis for risk of impairment in Wechsler Memory Scale-III Word Lists Delayed Recall at 18 months

Variable	Odds ratio	95% CI	p value
Age, y (≤50 vs. >50)	1.5	0.1–20.9	0.774
D40% of hippocampus >7.3 Gy	19.3	1.1–338.0	0.043
Age, y (≤50 vs. >50)	1.2	0.1–15.8	0.876
D100% of hippocampus>0.0 Gy	14.8	0.8–266.2	0.068

Abbreviations: D40% = equivalent dose in 2-Gy fractions (EQD₂) assuming α/β = 2 Gy to 40% of the structure volume; D100% = EQD₂ to 100% of the structure volume; CI = confidence interval.