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Table 3 Univariate (t-test or chi-square) and multivariable logistic regression analyses predictors of having mastectomy

From: Measuring decision quality: psychometric evaluation of a new instrument for breast cancer surgery

  Mast Lump Univariate Multivariable
Factor N = 111 N = 272 p OR (95% CI)
Stage II (vs. I) 53.2 32.7 0.0002 1.81(0.89, 3.68)
Importance: (on a scale from 0 to 10)     
Keep breast 3.0 6.6 <0.0001 0.79 (0.70, 0.88)
Remove breast for peace of mind 9.3 3.5 <0.0001 1.88 (1.60, 2.22)
Avoid having cancer come back in the breast 9.9 9.6 0.0003  
Avoid radiation 5.1 2.1 <0.0001 1.23 (1.11, 1.36)
Avoid side effects of radiation 6.0 5.5 0.21  
Avoid hassle of radiation 4.4 2.4 <0.0001  
  1. Factors in bold were significant in the multivariable regression model and used to calculate the concordance score.
  2. Mast=mastectomy; Lump=lumpectomy; OR=odds ratio; CI=confidence interval.