Table 2.

Tumor features in patients diagnosed between 2012–2014

n (%)
Known tumor grade (n = 28,932)
 Grade I4,142 (14.3)
 Grade II12,558 (43.4)
 Grade III/IV12,232 (42.3)
Known ER Status (n = 29,918)
 ER-positive26,170 (87.5)
 ER-negative3,748 (12.5)
Known PR Status (n = 28,170)
 PR-positive22,062 (78.3)
 PR-negative6,108 (21.7)
Known tumor size (n = 25,667)
 1–10 mm12,144 (47.3)
 11–30 mm9,776 (38.1)
 >30 mm3,747 (14.6)
Known tumor grade, ER and/or PR Statusa (n = 26,552)
 Low riskb14,762 (55.6)
 Non-low risk11,790 (44.4)
  • aRestricted to age ≥ 40 years.

  • bGrade I/II, ER-positive, and/or PR-positive.