Table 3: Clinicopathologic characteristics of breast cancer patients by BMI category (N = 348).

CharacteristicNormal weight (n = 64)Overweight (n = 118)Obese (n = 166) value

Age at diagnosisa (years)43.73 ± 9.2351.83 ± 11.1953.16 ± 10.29<0.001
BMIa (kg/m2)22.25 ± 2.2427.76 ± 1.3933.57 ± 4.12<0.001

Menopausal status<0.001
Premenopausal43 (67.2)52 (44.1)58 (34.9)
Postmenopausal21 (32.8)66 (55.9)108 (65.1)

Histologic type0.191
Invasive ductal carcinoma56 (87.5)90 (76.3)131 (78.9)
Other8 (12.5)28 (23.7)35 (21.1)

Tumor stage0.248
Early (I/II)38 (59.4)68 (57.6)82 (49.4)
Advanced (III/IV)26 (40.6)50 (42.4)84 (50.6)

Tumor grade0.003
I and II28 (43.8)71 (60.2)67 (40.4)
III36 (56.3)47 (39.8)99 (59.6)

LVI0.458
Identified49 (76.6)82 (69.5)125 (75.3)
Not identified15 (23.4)36 (30.5)41 (24.7)

aMean ± SD, one-way ANOVA test. Data are presented as n (%), unless otherwise specified. 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.