Table 4.

Adjusted^* estimated regression coefficients (β) with 95 % confidence intervals for dietary patterns in relation to age, education and lifestyle factors among 6298 women aged 50–69 years, Norwegian Breast Cancer Screening Programme, 2008

		Dietary pattern
		‘Prudent’		‘Western’		‘Continental’
Characteristic	n	β	95 % CI	β	95 % CI	β	95 % CI
Age (years)
50–55	2327	Ref.	–	Ref.	–	Ref.	–
56–60	1995	0·17	0·12, 0·21	0·01	−0·04, 0·06	−0·36	−0·42, −0·31
61–65	1677	0·21	0·16, 0·26	0·06	0·01, 0·11	−0·62	−0·68, −0·56
66–69	299	0·22	0·13, 0·32	0·10	0·003, 0·20	−0·81	−0·92, −0·70
P trend		<0·001		0·006		<0·001
Education
Primary and secondary school	1253	Ref.	–	Ref.	–	Ref.	–
Upper secondary school	2510	0·05	−0·005, 0·10	−0·07	−0·12, −0·02	0·11	0·05, 0·18
Academy/college/university (≤4 years)	1536	0·16	0·10, 0·22	−0·31	−0·37, −0·25	0·22	0·14, 0·29
Academy/college/university (>4 years)	999	0·29	0·22, 0·35	−0·51	−0·58, −0·44	0·24	0·16, 0·32
P trend		<0·001		<0·001		<0·001
BMI (kg/m2)
18·5–24·9	3183	Ref.	–	Ref.	–	Ref.
25·0–29·9	2232	0·07	0·03, 0·12	0·05	0·01, 0·10	0·08	0·03, 0·13
≥30·0	827	0·12	0·06, 0·18	0·12	0·06, 0·19	0·13	0·06, 0·20
P trend †		<0·001		0·001		<0·001
<18·5	56	0·01	−0·19, 0·21	0·11	−0·10, 0·32	−0·22	−0·46, 0·03
Physical activity (MET-h/week)
Quartile 1 (0–7·2)	1450	Ref.	–	Ref.	–	Ref.	–
Quartile 2 (7·5–14·3)	1720	0·12	0·06, 0·17	−0·09	−0·15, −0·04	−0·04	−0·11, 0·02
Quartile 3 (14·4–24·0)	1540	0·27	0·21, 0·32	−0·28	−0·34, −0·23	−0·04	−0·11, 0·03
Quartile 4 (24·1–101·5)	1588	0·46	0·40, 0·52	−0·40	−0·46, −0·34	−0·14	−0·21, −0·07
P trend		<0·001		<0·001		<0·001
Smoking
Never	2828	Ref.	–	Ref.	–	Ref.	–
Former	2250	0·04	−0·005, 0·08	−0·16	−0·20, −0·11	0·29	0·24, 0·35
Current	1220	−0·14	−0·20, −0·09	0·04	−0·01, 0·10	0·34	0·28, 0·40
P		<0·001		<0·001		<0·001

MET, metabolic equivalent of task; Ref., reference category.

^*All characteristics are mutually adjusted for each other and for energy intake.

^†BMI category ‘<18·5’ is not included in the test for trend.