From:  Correlation between histopathological features and recurrence score according to menopausal status in HR+/HER2– breast cancer patients: a retrospective study

 Population characteristics

Patient characteristicsTotal population (n = 180, 100%)Pre-menopausal (n = 63, 35.0%)Post-menopausal (n = 117, 65.0%)P-value
Age, years (median IQR)57.5 (49–67.5)47 (44–50)64 (58–69)< 0.0001
Tumor histology, n (%)0.60
    NST132 (73.3)49 (77.8)83 (70.9)
    Lobular32 (17.8)9 (14.3)23 (19.7)
    Other16 (8.9)5 (7.9)11 (9.4)
Tumor size, mm (median IQR)18 (12.5–23)18 (12–25)18 (13–22)0.57
pT, n (%)0.50
    pT1111 (61.7)41 (65.1)70 (59.8)
    pT267 (37.2)22 (34.9)45 (38.5)
    pT32 (1.1)-2 (1.7)
Number of positive nodes, n (%)0.65
    0111 (61.7)42 (66.7)69 (59.0)
    155 (30.5)18 (28.6)37 (31.6)
    210 (5.6)3 (4.7)7 (6.0)
    32 (1.1)-2 (1.7)
    NA2 (1.1)-2 (1.7)
pN, n (%)0.39
    pN0111 (61.7)42 (66.7)69 (59.0)
    pN167 (37.2)21 (33.3)46 (39.3)
    NA2 (1.1)-2 (1.7)
LVI, n (%)0.47
    Evident52 (28.9)20 (31.8)32 (27.3)
    Not evident125 (69.4)41 (65.0)84 (71.8)
    NA3 (1.7)2 (3.2)1 (0.9)
PNI, n (%)0.87
    Present53 (29.4)17 (27.0)36 (30.7)
    Abstent120 (66.7)40 (63.5)80 (68.4)
    NA7 (3.9)6 (9.5)1 (0.9)
Tumor grading, n (%)0.21
    112 (6.7)3 (4.8)9 (7.7)
    2119 (66.1)47 (74.6)72 (61.5)
    349 (27.2)13 (20.6)36 (30.8)
ER positivity, % (median IQR)95 (90–95)95 (90–95)95 (90–95)0.0002
PgR positivity, % (median IQR)80 (40–90)90 (55–90)70 (30–90)0.0051
HER2, n (%)0.42
    070 (38.9)22 (34.9)48 (41.0)
    1–2110 (61.1)41 (65.1)69 (59.0)
Ki67, % (median IQR)25 (15–30)20 (15–28)25 (15–30)0.29
RS (median IQR)16 (12–22)15 (11–18)17 (12–22)0.41

Bold indicates statistically significant P-values (≤ 0.05). IQR: interquartile range; NST: non-special type; NA: not available; LVI: lymphovascular invasion; PNI: perineural invasion; ER: estrogen receptor; PgR: progesterone receptor; HER2: human epidermal growth factor-receptor 2; RS: recurrence score