Table 1.

Correlation between BMI and clinicopathological variables of breast cancer patients.

Variables	Cases (n= 3891)	SYSUCC Data Set						P value
		UW		NW		OW
		No.	%	No.	%	No.	%
Age (years)								<0.001
<40	846	118	46.6%	616	23.3%	112	11.3%
≥40	3045	135	53.4%	2032	76.7%	878	88.7%
Menopause								<0.001
No	2380	189	74.7%	1727	65.2%	464	46.9%
Yes	1511	64	25.3%	921	34.8%	526	53.1%
Tumor status (T)								<0.001
T1	1117	78	30.8%	819	30.9%	220	22.2%
T2	2134	134	53.0%	1419	53.6%	581	58.7%
T3	369	20	7.9%	241	9.1%	108	10.9%
T4	271	21	8.3%	169	6.4%	81	8.2%
Axillary lymph node metastasis								0.364
No	1961	135	53.4%	1343	50.7%	483	48.8%
Yes	1930	118	46.6%	1305	49.3%	507	51.2%
Distance metastasis (M)								0.749
No	3756	244	96.4%	2560	96.7%	952	96.2%
Yes	135	9	3.6%	88	3.3%	38	3.8%
TNM Staging								0.026
I-II	2806	185	73.1%	1940	73.3%	681	68.8%
III-IV	1085	68	26.9%	708	26.7%	309	31.2%
Histological grade								0.043
G1	122	7	2.8%	91	3.4%	24	2.4%
G2	1932	137	54.2%	1333	50.3%	462	46.7%
G3	1837	109	43.1%	1224	46.2%	504	50.9%
ER status								0.757
Negative	1549	105	41.5%	1045	39.5%	399	40.3%
Positive	2264	143	56.5%	1554	58.7%	567	57.3%
Unknown	78	5	2.0%	49	1.9%	24	2.4%
PR status								0.630
Negative	1471	102	40.3%	987	37.3%	382	38.6%
Positive	2348	146	57.7%	1616	61.0%	586	59.2%
Unknown	72	5	2.0%	45	1.7%	22	2.2%
HER-2 status								0.224
- or +	2516	154	60.9%	1720	65.0%	642	64.8%
++	353	29	11.5%	248	9.4%	76	7.7%
+++	766	50	19.8%	503	19.0%	213	21.5%
Unknown	256	20	7.9%	177	6.7%	59	6.0%
Subtype								0.397
Luminal A or B	2667	169	66.8%	1828	69.0%	670	67.7%
HER-2	425	30	11.9%	273	10.3%	122	12.3%
TNBC	718	48	19.0%	498	18.8%	172	17.4%
Unknown	81	6	2.4%	49	1.9%	26	2.6%

* P < 0.05, statistically significant.