Table 2.

HR (95% CI) of each endpoint with BMI overall and by menopausal status

BMI	Cases	Events	All‐cause death			Events	Recurrence			Events	Breast cancer–specific death
			HR	95% CI	P		HR	95% CI	P		HR	95% CI	P
All
≥30	897	92	1.46	1.16–1.83	0.0012	127	1.15	0.95–1.39	0.15	63	1.47	1.11–1.93	0.0065
≥25–<30	4015	298	1.04	0.90–1.21	0.58	478	0.97	0.87–1.09	0.61	191	1.03	0.86–1.24	0.75
≥21.8–<25	6784	476	1.02	0.90–1.17	0.74	839	1.02	0.93–1.13	0.68	323	1.03	0.88–1.21	0.72
≥18.5–<21.8	6833	414	Referencea			796	Referencea			287	Referencea
<18.5	1561	138	1.41	1.16–1.71	0.0005	193	1.09	0.94–1.28	0.26	73	1.16	0.90–1.50	0.27
P trend					0.026				0.6				0.067
Premenopausal
≥30	222	20	1.46	0.91–2.35	0.12	35	1.21	0.85–1.71	0.29	16	1.34	0.79–2.27	0.28
≥25–<30	879	62	1.10	0.81 –1.49	0.54	121	1.00	0.81 –1.23	0.99	54	1.09	0.78 –1.50	0.63
≥21.8–<25	1923	98	0.90	0.69–1.17	0.44	225	0.91	0.77–1.08	0.26	81	0.86	0.64–1.14	0.29
≥18.5–<21.8	3065	140	Referenceb		364	Referenceb			122	Referenceb
<18.5	696	32	1.08	0.74–1.59	0.69	72	0.86	0.67–1.11	0.24	23	0.91	0.58–1.43	0.68
P trend					0.21				0.71				0.39
Postmenopausal
≥30	640	70	1.47	1.13–1.92	0.0045	88	1.15	0.92–1.46	0.23	46	1.58	1.13–2.20	0.0072
≥25–<30	2987	228	1.01	0.84–1.20	0.95	335	0.96	0.83–1.11	0.55	131	1.02	0.80–1.28	0.9
≥21.8–<25	4611	354	1.02	0.87–1.20	0.78	570	1.06	0.93–1.20	0.39	229	1.11	0.91–1.36	0.31
≥18.5–<21.8	3524	264	Referenceb			414	Referenceb			156	Referenceb
<18.5	814	97	1.45	1.15–1.84	0.0018	113	1.19	0.97–1.47	0.1	45	1.22	0.88–1.71	0.24
P trend					0.11				0.82				0.11

HR, hazard ratio; CI, confidence interval; BMI, body mass index.

^aAdjusted by age, living place, detection method, family history of breast cancer, tumor stage, radiation therapy, chemotherapy, endocrine therapy, tumor subtypes, menopausal status, and registered year.

^bAdjusted by age, living place, detection method, family history of breast cancer, tumor stage, radiation therapy, chemotherapy, endocrine therapy, tumor subtypes, and registered year.