To describe which dietary nutrient variables are related to subjective and objective
habitual sleep and subjective and objective napping.
Participants were 459 post-menopausal women enrolled in the Women's Health Initiative.
Objective sleep was estimated using one week of actigraphy. Subjective sleep was prospectively
estimated with a daily sleep diary. Dietary nutrients were calculated from food frequency
questionnaires.
The most significant correlations were with subjective napping, including (from strongest
to weakest): total fat, calories, saturated fat, monounsaturated fat, trans fat, water,
proline, serine, tyrosine, phenylalanine, valine, cholesterol, leucine, glutamic acid,
ash, isoleucine, histidine, sodium, tryptophan, protein, threonine, cystine, methionine,
phosphorous, polyunsaturated fat, animal protein, aspartic acid, arginine, lysine,
alanine, caffeine, riboflavin, gamma-tocopherol, glycine, retinol, delta-tocopherol,
Vitamin D, and selenium. Actigraphic nocturnal sleep duration was negatively associated
with total fat, monounsaturated fat, trans fat, saturated fat, polyunsaturated fat,
calories, gamma-tocopherol, cholesterol, and alpha-tocopherol-eq.
Actigraphic total sleep time was negatively associated with intake of fats. Subjective
napping, which may be a proxy for subjective sleepiness, was significantly related
to fat intake as well as intake of meat.
2009 Elsevier B.V. All rights reserved.