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Table 3 Univariate analysis on the time to xerostomia resolution or downgrade to GR1

From: Parotid gland shrinkage during IMRT predicts the time to Xerostomia resolution

Covariate Stratification HR 95% CI p value
Age Continuum 1.007 0.980-1.035 0.605
Sex F vs M 0.679 0.243-1.900 0.461
AJCC stage I-III vs IV 1.634 0.912-2.928 0.099
Induction + conc CHT Yes vs No/Cet 0.519 0.162-1-659 0.269
Concomitant CHT Yes vs No/Cet 0.556 0.295-1.050 0.070
Body Mass Index Continuum 0.938 0.885-0.995 0.034
% PG Shrinkage at mid-tmt Continuum 1.028 1.000-1.057 0.046
Smoking at diagnosis Yes vs No 0.912 0.664-1.253 0.572
Smoking during follow up Yes vs No 0.886 0.597-1.315 0.547
H- Mean PG pl-D Continuum 0.962 0.930-0.995 0.023
L- Mean PG pl-D Continuum 0.963 0.927-1.002 0.061
WA mean PG pl-D Continuum 0.943 0.904-0.984 0.007
H- Mean SMG pl-D Continuum 0.943 0.871-1.020 0.142
L- Mean SMG pl-D Continuum 0.992 0.961-1.025 0.647
WA mean SMG pl-D Continuum 0.981 0.935-1.030 0.436
WA mean PG + SMG pl-D Continuum 0.944 0.904-0.987 0.011
Oral mucosa mean D Continuum 0.991 0.951-1.033 0.674
  1. Abbreviations: see Table 2; HR hazard ratio, CI confidence intervals, CHT chemotherapy, pl-D planning dose, F female, M male, PG parotid gland, SMG submandibular gland, WA weighted average.