ESR1 and cancer: Unadjusted analysis did not demonstrate any significant associations between ERα expression and risk of cancer recurrence, cancer-specific or overall survival and results were similar following adjustment for potential confounders (HR 1.32, 95% CI 0.41, 4.24), (HR 1.14, 95% CI 0.29, 4.50) and (HR 1.36, 95% CI 0.44, 4.23), respectively.