Light measurement in the hospital: A comparison of two methods

Authors

  • Patricia A. Higgins,

    Corresponding author
    1. Frances Payne Bolton School of Nursing, Case Western Reserve University, 10900 Euclid Ave., Cleveland, OH
    • Frances Payne Bolton School of Nursing, Case Western Reserve University, 10900 Euclid Ave., Cleveland, OH
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    • Assistant Professor.

  • Chris Winkelman,

    1. Frances Payne Bolton School of Nursing, Case Western Reserve University, 10900 Euclid Ave., Cleveland, OH
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    • Assistant Professor.

  • Amy R. Lipson,

    1. Frances Payne Bolton School of Nursing, Case Western Reserve University, 10900 Euclid Ave., Cleveland, OH
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    • Project Manager.

  • Su-Er Guo,

    1. School of Occupational and Environmental Hygiene, University of British Columbia, Vancouver, BC, Canada
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  • James Rodgers

    1. Case Western Reserve University, Cleveland, OH
    2. University of Pennsylvania, Philadelphia, PA
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  • The authors thank cyrus taylor, professor of physics, case western reserve university, for his contributions to this study and manuscript.

Abstract

Disrupted sleep in hospitalized patients is widely reported, and ambient environmental lighting may be both a contributor to and a modifier of sleep/wake patterns. This is the first study to examine the congruence between two types of light meters, a wrist-worn device and a stand-alone device, and their respective light intensity measurements. The study sample included 20 light trials in 17 patients for a total of 480 paired light measurements. Descriptive data analysis indicated that both light meters dependably recorded changes in light levels, and Bland Altman plots demonstrated congruence between data from the two types of light meters. The results provide promising data on how to measure patient exposure to ambient light dependably in the continuously changing and unpredictable clinical setting. © 2007 Wiley Periodicals, Inc. Res Nurs Health 30: 120–128, 2007

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