Table 1. Socio-demographic and medical characteristics of TNBC by BMI at study enrollment.

Characteristics	Total a	BMI category				P value b
		<18.5(n=17)	18.5-23.9(n=253)	24.0-27.9(n=183)	≥28.0(n=65)
Age at diagnosis(year)	53.37(10.59)	48.74(11.77)	52.08(10.45)	53.92(10.23)	58.05(10.36)	<0.01
Time interval from diagnosis to study enrollment (month)	6.51(0.71)	6.43(0.43)	6.48(0.73)	6.53(0.72)	6.54(0.68)	0.84
Waist-to-hip ratio	0.83(0.05)	0.77(0.05)	0.82(0.05)	0.85(0.05)	0.86(0.05)	<0.01
Education level (%)
<high school	48.65	23.53	48.22	47.54	60.00
High School	36.68	58.52	37.15	38.80	23.08
≥ high school	14.67	17.65	14.62	13.66	16.92	0.11
Married (%)c	88.03	76.47	90.51	86.89	84.52	0.20
Post-menopausal (%)c	53.09	35.29	48.22	54.64	72.31	<0.01
Charlson comorbidity index≥1(%)c	21.04	5.88	19.76	23.60	23.08	0.33
Exercise participation (%)c	66.80	64.71	68.77	62.84	70.77	0.52
Tea consumption (%)c	21.62	17.65	19.37	20.77	33.85	0.08
Mastectomy (%)c	95.56	94.12	95.65	95.63	95.38	0.92
Chemotherapy(%)c	94.40	94.12	95.44	92.35	92.31	0.18
Radiotherapy(%)c	27.41	29.41	26.88	28.42	26.15	0.98
Immunotherapy(%)c	17.76	29.41	18.97	29.41	17.58	0.26d
Tamoxifen use(%)c	21.62	23.53	21.74	21.31	21.54	0.99
Stage
I	30.89	41.18	30.43	29.51	33.85
II	55.60	47.06	54.55	58.47	53.85
III	10.23	5.88	11.86	8.74	9.23
unknown	3.28	5.88	3.16	3.28	3.08	0.95d

^aUnless specified, means (SDs) are presented

^bThe p values were obtained using the χ² test and Fisher's exact test

^cCompared with women who had no corresponding characteristic

^dUnknown group was excluded from χ² test