Table 1.

Age and age-standardized characteristics in 1991 according to intake of total dairy products during early adulthood among women enrolled in the Nurses’ Health Study II

	Total dairy products, quintile
	1	2	3	4	5
Number	18,094	18,045	18,246	18,016	18,102
Mean±SD
Age, years	37.1±4.6	36.7±4.6	36.5±4.7	36.3± 4.6	35.7±4.6
Total dairy products intake, serving/day	0.7±0.3	1.3±0.2	1.9±0.2	2.9±0.3	4.5±1.2
Low-fat dairy intake, serving/day	0.3±0.2	0.8± 0.4	1.1±0.4	1.9±0.8	2.7±1.3
High-fat dairy intake, serving/day	0.4±0.2	0.6±0.4	0.9±0.4	1.0±0.8	1.8±1.5
Total energy intake, kcal	1443±477	1611±468	1798±471	1920±496	2183±513
Total fiber intake, g/day	18.6±6.3	18.6±5.5	18.6±5.2	18.1±5.4	17.4±4.9
Animal fat intake, % energy	16.4±5.1	17.0± 4.5	17.5±4.2	17.7±4.3	18.9±4.6
Total red meat intake, serving/day	0.7±0.5	0.8±0.5	0.8±0.5	0.8±0.6	0.9±0.6
Total fruit intake, serving/day	0.8±0.8	0.9±0.8	1.1±0.8	1.2±0.9	1.3±1.0
Total vegetable intake, serving/day	2.4±1.6	2.5±1.5	2.8±1.6	2.9±1.7	3.1±1.7
Adult body mass index, kg/m2	24.5±5.4	24.6±5.3	24.6±5.4	24.6±5.3	24.6±5.2
Height, cm	164.2±6.6	164.5±6.6	164.9±6.6	165.1±6.6	165.4±6.6
Body mass index at age 18, kg/m2	21.2± 3.4	21.3±3.3	21.4±3.4	21.3±3.3	21.2±3.2
Age at first birth, years	25.4±4.1	25.5±4.0	25.8±4.1	26.1±4.1	26.5±4.3
Age at menarche, years	12.4± 1.4	12.4±1.4	12.4±1.4	12.4±1.4	12.4±1.4
%
Alcohol intake
Never	46	41	39	43	43
<5 g/day	36	40	41	39	39
≥5 g/day	18	19	20	18	18
Current smokers	15	13	11	10	11
Ever oral contraceptive use	85	85	85	84	83
History of benign breast disease	10	9	10	9	9
Family history of breast cancer in mother or sisters	15	15	16	15	15
Nulliparous	31	29	27	25	22