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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.