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Table 3 Multivariable analyses in validation ER-positive cohorts

From: Aberrant fatty acid profile and FFAR4 signaling confer endocrine resistance in breast cancer

Cohort

Covariates

Recurrence-free survival

HR (95% CI)

P

E-MTAB-365 ER-positive cohorta

 

FFAR4 (continuous)

1.168 (0.988–1.381)

0.070

 

Age at diagnosis

1.015 (0.995–1.037)

0.149

 

Grade (3 vs 2 or 1)

1.656 (0.995–2.756)

0.052

 

LN (positive vs negative)

1.687 (0.986–2.888)

0.056

 

FFAR4 (high vs low)

1.512 (0.944–2.421)

0.086

 

Age at diagnosis

1.014 (0.993–1.035)

0.183

 

Grade (3 vs 2 or 1)

1.660 (0.998–2.759)

0.051

 

LN (positive vs negative)

1.659 (0.968–2.843)

0.066

GSE4922 ER-positive cohort

 

FFAR4 (continuous)

1.236 (1.017–1.507)

0.033

 

Age at diagnosis

1.003 (0.985–1.021)

0.723

 

Grade (3 vs 2 or 1)

1.404 (0.792–2.489)

0.245

 

Tumor size (> 2 cm vs ≤ 2 cm)

2.215 (1.349–3.639)

0.002

 

LN (positive vs negative)

1.542 (0.945–2.517)

0.083

 

FFAR4 (high vs low)

1.738 (1.068–2.828)

0.026

 

Age at diagnosis

1.002 (0.984–1.020)

0.834

 

Grade (3 vs 2 or 1)

1.308 (0.728–2.350)

0.370

 

Tumor size (> 2 cm vs ≤ 2 cm)

2.213 (1.347–3.635)

0.002

 

LN (positive vs negative)

1.551 (0.952–2.527)

0.078

  1. Abbrevation: LN Lymph node status, HR hazard ratio, CI confidence interval
  2. FFAR4 mRNA level as a continuous variable or as a binary variable (high vs low)
  3. aThe E-MTAB-365 cohort contains no tumor size information. All Wald statistical tests were two-sided; boldface was used to indicate the key variable (FFAR4)