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. Author manuscript; available in PMC: 2018 Dec 1.
Published in final edited form as: Breast Cancer Res Treat. 2017 Aug 19;166(3):855–864. doi: 10.1007/s10549-017-4439-6

Table 3.

Estrogen Receptor (ER) Quantitative Measures: Association with Common Prognostic Indicators in the Population-based Subcohort Sample.

Quantitative Measure Tumor Size (cm) Positive Nodes Tumor Grade
Mean Median Mean Median Mean Median
ER Percent:
1–59% 2.5 2.1 0.9 0 2.2 2.0
60–89% 2.3 1.6 2.2 0 1.9 2.0
90% 1.9 1.5 1.3 0 1.8 2.0
91–96% 2.1 1.7 0.9 0 1.8 2.0
97%+ 1.9 1.5 1.1 0 1.7 2.0
p-trenda .001 .08 .001
ER Intensity:
1 2.5 1.8 1.1 0 1.9 2.0
2 2.0 1.5 1.7 0 1.7 2.0
3 2.2 1.8 1.2 0 1.8 2.0
p-trend .71 .79 .41
a

Trend test for relationship between ER quantitative measures (left column) and continuous measures of tumor size, positive node count, and grade (Chi-Square or Fisher’s Exact Test)