. Author manuscript; available in PMC: 2013 Jul 1.

Published in final edited form as: Int J Radiat Oncol Biol Phys. 2011 Nov 4;83(3):1007–1014. doi: 10.1016/j.ijrobp.2011.09.004

Table. 2.

Predictors of observer-rated toxicity (CTCAE xerostomia grade ≥2)

	Univariate Analysis		Multivariate model

Variable	Odds ratio estimate (CI)	p value	Odds ratio estimate (CI)	p value
Oral cavity mean dose	1.06 (1.02, 1.10)	0.002	1.04 (1.00, 1.08)	0.05
PG mean dose	1.05 (1.00, 1.11)	0.04	1.01 (0.96, 1.07)	0.6
SMG mean dose	1.05 (1.01, 1.08)	0.009	1.02 (0.98, 1.06)	0.3
Baseline XQ score	1.02 (0.99, 1.04)	0.06
Stimulated parotid saliva rate	0.18 (0.026, 1.26)	0.08
Unstimulated parotid saliva rate	0.00 (0.00, 3.85)	0.09
Stimulated SMG saliva rate	1.13 (0.001, 2.35)	0.9
Unstimulated SMG saliva rate	0.00 (0.00, 3.88)	0.2
AJCC Stage III vs. IV	0.93 (0.42, 1.49)	0.8
Gender	1.23 (0.47, 3.2)	0.7
Age	1.03 (0.99, 1.07)	0.1
Time (categorical)	-	-	-	<0.0001