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Table 4 Multivariate analyses* of factors associated with surgical treatment according to disease stage

From: Association of shared decision-making with type of breast cancer surgery: a cross-sectional study

  

Mastectomy (ref. BCS) OR (95% CI)

  

Stage 0-IIa** n = 1,518

Stage IIb*** n = 375

Patients' predisposing factors

  

   Age at diagnosis, ≥65 (ref:< 65)

NA

5.63(1.80-7.60)

   Comorbidities (ref. none)

NA

2.07(1.39-3.09)

   College or higher (ref. high school or less)

NA

0.60(0.43-0.85)

   Premenopausal (ref. Postmenopausal)

NA

1.43(1.25-1.63)

   Estrogen receptor, positive (ref: negative)

0.79(0.69-0.89)

NA

   Higher stage****

1.25(1.13-1.38)

NA

   Shared decision making

  

   Being patient's opinion respected in treatment decision (ref. no)

NA

5.43(3.48-8.46)

   Physician's giving information

  

Breast surgery option (ref. no)

0.36(0.28-0.45)

NA

Using chemotherapy (ref. no)

2.79(2.37-3.29)

NA

Using hormone therapy (ref. no)

1.94(1.67-2.24)

2.69(1.92-3.75)

  1. Abbreviation: BCS, breast-conserving surgery; NA, Not available; CI, confidence interval
  2. *All analyses weighted to account for differential selection by clinical factors of non-response.
  3. ** Results of logistic regression with stepwise selection methods whose covariates were age at diagnosis, monthly income, residential area, comorbidity, estrogen receptor status, disease stage (continuous type), patient's participation in treatment decision, physician's giving information on surgery, physician's giving information on chemotherapy, and physician's giving information on hormone therapy, which were significant in univariate analyses.
  4. **The results of logistic regression with stepwise selection methods, whose covariates were age at diagnosis, educational level, marital status, comorbidity, menopausal status at diagnosis, progesterone receptor status, patient's participation in treatment decision, physician's giving information on chemotherapy, and physician's giving information on hormone therapy, all of which were significant in univariate analyses.
  5. **** Stage 0, I, and IIa entered into model as continuous type such as 0, 1, and 2 in early stage disease.
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