. Author manuscript; available in PMC: 2014 Dec 1.

Published in final edited form as: Am J Med. 2013 Oct 11;126(12):10.1016/j.amjmed.2013.04.026. doi: 10.1016/j.amjmed.2013.04.026

Table 1.

Baseline Characteristics of Nurses’ Health Study II Women

	(n=68,421)
Age, years	34.5 (4.6)
Caucasian, %	93.1
Body mass index, kg/m²	22.6 (20.7–25.6)
Waist Circumference, cm	73.7 (68.6–83.8)
Physical activity, METs^a/week	13.9 (5.4–30.2)
Never smoker, %	66.7
Past smoker, %	21.3
Current smoker, %	11.6
Alcohol, g/d	0.9 (0.0–3.50)
Vitamin B12, mcg/d	7.0 (5.0–11.0)
Folate, mcg/d	372 (280–609)
Potassium, mg/d	2940 (533)
Magnesium, mg/d	316 (74)
Vitamin A, IU/d	11,113 (7702–15,722)
History of hypertension, %	5.0
History of diabetes, %	0.6
Ibuprofen use^b, %	18.3
Acetaminophen use^b, %	20.6
Walking, %
<1 hour/wk	41.9
1–1.5 hrs/wk	24.8
2–3 hrs/wk	17.0
4+ hrs/wk	16.3

Values are means (SD), medians (interquartile range) or percentages.

Dietary factors assessed in 1991.

Waist circumference assessed in 1993.

Ibuprofen and acetaminophen use assessed in 1995.

Metabolic equivalent tasks from recreational and leisure-time activities.

Regular use 2+ times per week