Table 3.

Multivariable-adjusted relative risk (MVRR) and 95 % confidence interval (CI) of breast cancer by menopausal status by categories of intake of meat

Meats (g/week)a	Type of breast cancer
	Total			Premenopausal			Postmenopausal
	ncases	Person-years	MVRR (95 % CI)	ncases	Person-years	MVRR (95 % CI)	ncases	Person-years	MVRR (95 % CI)
Total meat
<400	229	100,331	1.00 (REF)	103	64,221	1.00 (REF)	103	25,443	1.00 (REF)
400–599.9	262	110,340	1.02 (0.85–1.23)	119	71,461	0.99 (0.75–1.29)	110	26,730	1.01 (0.76–1.32)
600–799.9	241	105,897	1.01 (0.83–1.22)	102	70,534	0.85 (0.63–1.13)	94	24,410	0.95 (0.71–1.28)
800–999.9	198	82,818	1.08 (0.88–1.33)	87	55,375	0.94 (0.69–1.28)	79	18,611	1.05 (0.76–1.44)
≥1,000	338	156,820	1.04 (0.85–1.28)	162	107,936	0.94 (0.69–1.27)	134	33,012	1.04 (0.76–1.42)
ptrend			0.60			0.64			0.75
Red meat
<100	492	197,620	1.00 (REF)	203	124,977	1.00 (REF)	223	51,235	1.00 (REF)
100–199.9	335	141,125	1.00 (0.86–1.15)	151	91,843	1.01 (0.83–1.22)	140	34,124	0.96 (0.77–1.19)
200–299.9	172	84,530	0.90 (0.75–1.09)	75	57,437	0.90 (0.70–1.14)	67	18,367	0.86 (0.65–1.15)
300–399.9	102	49,674	0.95 (0.76–1.19)	49	34,543	0.98 (0.73–1.31)	38	10,036	0.92 (0.64–1.32)
≥400	167	83,257	1.02 (0.83–1.24)	95	60,727	1.01 (0.78–1.30)	52	14,444	0.86 (0.62–1.20)
ptrend			0.83			0.89			0.39
Processed meat
<100	851	364,025	1.00 (REF)	366	237,164	1.00 (REF)	177	44,973	1.00 (REF)
100–199.9	265	116,477	1.01 (0.87–1.17)	130	78,958	1.16 (0.96–1.40)	159	39,485	0.97 (0.77–1.22)
≥200	152	75,704	0.99 (0.82–1.20)	77	53,405	0.92 (0.72–1.18)	184	43,748	0.93 (0.69–1.27)
ptrend			0.96			0.97			0.64
White meat
<100	225	96,243	1.00 (REF)	104	62,246	1.00 (REF)	97	23,951	1.00 (REF)
100–199.9	268	124,886	0.92 (0.77–1.10)	125	81,639	0.90 (0.71–1.13)	105	29,725	0.89 (0.67–1.18)
200–299.9	238	100,044	1.02 (0.84–1.23)	110	66,692	1.02 (0.80–1.29)	99	22,857	1.08 (0.81–1.44)
300–399.9	143	66,033	0.90 (0.72–1.11)	63	43,551	0.90 (0.67–1.20)	61	15,689	0.95 (0.68–1.33)
≥400	394	169,000	1.05 (0.87–1.25)	171	115,399	0.90 (0.72–1.13)	158	10,046	1.12 (0.85–1.47)
ptrend			0.45			0.47			0.25
Fish
<100	453	222,891	1.00 (REF)	217	156,109	1.00 (REF)	177	44,973	1.00 (REF)
100–199.9	407	162,947	1.10 (0.95–1.26)	179	105,715	1.05 (0.87–1.25)	159	39,485	1.00 (0.80–1.25)
≥200	408	170,368	1.03 (0.89–1.19)	177	107,703	0.97 (0.80–1.17)	184	43,748	1.04 (0.83–1.30)
ptrend			0.69			0.77			0.71

Multivariable relative risks (MVRRs) were adjusted for energy intake (quintiles), age at menarche (<12, 12–13, ≥14 years), body mass index (<25, 25–29, ≥30 kg/m²), family history of breast cancer (mother or sister), education (≤12, 13–15, ≥16 years), parity and age at first live birth (nulliparous, parity 1–2 and age at first birth <25 years, parity 1–2 and age at first birth 25–29 years, parity 1–2 and age at first birth ≥30 years, parity ≥3 and age at first birth <25 years, parity ≥3 and age at first birth 25–29 years, parity ≥3 and age at first birth ≥30 years), oral contraceptive use (yes/no), menopausal status (postmenopausal, premenopausal, and uncertain), age at menopause (<35, 35–39, 40–44, 45–49,50–54, ≥55 years), menopausal hormone use (yes/no), vigorous physical activity (none, ≤2, >2 h/week), smoking status (never, former, current), and alcohol intake (none, 1–3, 4–6, ≥7 drinks/week)

^aRed meat: 1 (3–6 oz) serving is equivalent to 85–143 g; processed meat: 1 (e.g., 1 oz, 1 slice, 1 hotdog) serving is equivalent to 20–45 g; white meat: 1 (4–6 oz) serving is equivalent to 112–140 g; and fish: 1 (3–5 oz) serving is equivalent to 98–112 g