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Table 4 Multivariable logistic regression analysis for factors associated with use of adjuvant radiotherapy (Number of patients included in the regression analysis = 1643 [96.2%])

From: A cohort study of ethnic differences in use of adjuvant chemotherapy and radiation therapy for breast cancer in New Zealand

Characteristic OR 95% CI p
Māori ethnicitya 0.63 0.40-0.98 0.040
Ageb 0.96 0.95-0.98 <0.001
Year of diagnosisc 1.07 1.02-1.11 0.004
Deprivationd 0.92 0.79-1.06 0.232
Distancee    
 10-50 km 0.74 0.50-1.09 0.130
 50-100 km 0.67 0.44-1.03 0.067
  > 100km 0.47 0.23-0.96 0.040
Charlson scoref 0.49 0.34-0.72 <0.001
Surgery in public vs. private 0.86 0.61-1.26 0.467
Non-screen vs. screen detection 0.53 0.35-0.79 0.002
Mastectomy vs. BCS 0.32 0.17-0.57 <0.001
T stageg    
 T 2 0.84 0.57-1.24 0.394
 T 3 1.09 0.53-2.24 0.809
 T 4 1.42 0.66-3.07 0.366
N stageh    
 N 1 1.45 0.94-2.24 0.093
 N 2+ 2.66 1.38-5.10 0.003
  1. aMaori compared with NZ European ethnicity
  2. bAge as a continuous variable
  3. cYear of diagnosis as a continuous variable
  4. dDeprivation as a continuous variable
  5. eReference category Distance <10km
  6. fReference category Charlson score = 0
  7. gReference category T1 stage
  8. hReference category N0 stage