Table 4: Association of clinicopathologic characteristics with BMI among premenopausal and postmenopausal breast cancer patients (N = 348).

CharacteristicPremenopausal (N = 153)Postmenopausal (N = 195)
Normal weight (n = 43)Overweight (n = 52)Obese (n = 58)P valueNormal weight (n = 21)Overweight (n = 66)Obese (n = 108) value

Age (years)<5043 (100.0)49 (94.2)53 (91.4)0.1538 (38.1)10 (15.2)13 (12.0)0.011
≥500 (0.0)3 (5.8)5 (8.6)13 (61.9)56 (84.8)95 (88.0)

Histologic typeInvasive ductal39 (90.7)40 (76.9)49 (84.5)0.19117 (81.0)50 (75.8)82 (75.9)0.874
Others4 (9.3)12 (23.1)9 (15.5)4 (19.0)16 (24.2)26 (24.1)

Tumor stageEarly (I/II)26 (60.5)23 (44.2)32 (55.2)0.26212 (57.1)45 (68.2)50 (46.3)0.019
Advanced (III/IV)17 (39.5)29 (55.8)26 (44.8)9 (42.9)21 (31.8)58 (53.7)

Tumor gradeI and II17 (39.5)30 (57.7)22 (37.9)0.07911 (52.4)41 (62.1)45 (41.7)0.031
III26 (60.5)22 (42.3)36 (62.1)10 (47.6)25 (37.9)63 (58.3)

LVIIdentified32 (74.4)38 (73.1)40 (69.0)0.81117 (81.0)44 (66.7)85 (78.7)0.164
Not identified11 (25.6)14 (26.9)18 (31.0)4 (19.0)22 (33.3)23 (21.3)

Data are presented as n (%).Statistical significance at . BMI, body mass index; LVI, lymphovascular invasion. Other histologic subtypes included were invasive lobular carcinoma (ILC), ductal carcinoma in situ (DCIS), and mixed invasive ductal and lobular carcinoma.