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. 2020 Jun 12;6:24. doi: 10.1038/s41523-020-0165-z

Table 1.

Distributions of demographic data and tumor characteristics between the Case group and the Control group Student’s t-tests were performed for continuous variables and Pearson’s Chi-squared tests were performed for categorical variables.

Case (135) Control (69) P-value
Age (SD) Mean (SD) 49.7 (9.9) 49.8 (9.6) 0.96
Menopausal status N (%) 0.87
 Pre 114 76 (56.3%) 38 (55.1%)
 Post 90 59 (43.7%) 31 (44.9%)
Histology Class N (%) 0.78
 aClass 1 115 79 (58.5%) 40 (58.0%)
51 (37.8%) 25 (36.2%)  bClass 2 75
 NA 10 5 (3.7%) 4 (5.8%)
ER status N (%)
 Positive 109 (80.8%)
 Negative 23 (17.0%)
 Low 3 (2.2%)
Follow-up years (SD) 7.3 (4.4) 16.6 (5.4) <0.01
Has matched germline (%) 20 (14.8%) 6 (8.7%)
Has matched cancer (%) 10 (7.4%)

aClass 1/non-proliferative: “Non-proliferation” and “Benign, NOS”.

bClass 2/proliferative: “Proliferative lesion without atypia” (includes non-atypical hyperplasia, radial scar, sclerosing adenosis).