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Table 8 Multivariate Cox regression analyses of overall survival for tumor grades of T1b breast cancer patients in the matched cohort

From: Impact of adjuvant chemotherapy on T1N0M0 breast cancer patients: a propensity score matching study based on SEER database and external cohort

Variable

T1b: GRADEI

T1b: GRADEII

T1b: GRADEIII

Multivariate Analysis

Multivariate Analysis

Multivariate Analysis

HR (95%CI)

P-value

HR (95%CI)

P-value

HR (95%CI)

P-value

SURGERY

 Breast-conserving

reference

 

reference

 

reference

 

 Total mastectomy

0.88(0.35–2.19)

0.78

1.23(0.60–2.52)

0.58

0.91(0.50–1.66)

0.77

 Modified radical mastectomy

2.34(0.79–6.96)

0.13

2.06(0.91–4.67)

0.08

0.71(0.32–1.58)

0.40

RADIATION

 No

reference

 

reference

 

reference

 

 Yes

0.55(0.23–1.34)

0.19

0.83(0.41–1.65)

0.59

0.76(0.43–1.36)

0.36

CHEMOTHERAPY

 No

reference

 

reference

 

reference

 

 Yes

0.83(0.45–1.52)

0.54

0.80(0.55–1.18)

0.26

0.51(0.36–0.72)

 < 0.0001

SUBTYPE

 HoR + /HER2-

reference

 

reference

 

reference

 

 HoR + /HER2 + 

1.68(0.77–3.64)

0.19

1.10(0.68–1.78)

0.70

1.25(0.74–2.10)

0.41

 HoR-/HER2 + 

1.13(0.15–8.40)

0.90

1.99(0.96–4.13)

0.06

2.09(1.19–3.68)

0.01

 HoR-/HER2-

-

-

1.32(0.78–2.23)

0.31

1.47(0.97–2.23)

0.07

AGE (year)

 < 60

reference

 

reference

 

reference

 

 ≥ 60

6.42(3.13–13.17)

 < 0.0001

2.70(1.74–4.20)

 < 0.0001

2.44(1.62–3.67)

 < 0.0001

  1. Abbreviations: HR hazard ratio, HoR: hormone receptor, HER2 human epidermal growth factor receptor‐2