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Timing for the Introduction of Cycled Light for Extremely Preterm Infants: A Randomized Controlled Trial.

Publication ,  Journal Article
Brandon, DH; Silva, SG; Park, J; Malcolm, W; Kamhawy, H; Holditch-Davis, D
Published in: Res Nurs Health
August 2017

Day-night cycled light improves health outcomes in preterm infants, yet the best time to institute cycled light is unclear. The hypothesis of this study was that extremely preterm infants receiving early cycled light would have better health and developmental outcomes than infants receiving late cycled light. Infants born at ≤28 weeks gestation were randomly assigned to early cycled light (ECL) starting at 28 weeks postmenstrual age [PMA] or late cycled light (LCL), starting at 36 weeks PMA. Daylight was 200-600 lux and night was 5-30 lux. Primary outcomes were weight over time and length of hospitalization. Secondary outcomes were hospital costs, sleep development, and neurodevelopment at 9, 18, and 24 months corrected age. Of 121 infants randomized, 118 were included in analysis. Weight gain in the two groups did not differ significantly but increased across time in both groups. In PMA weeks 36-44, the mean weight gain was 193.8 grams in the ECL group compared to 176.3 grams in the LCL group. Effect sizes for weight were Cohen d = 0.26 and 0.36 for 36 and 44 weeks PMA. Infants in the ECL group went home an average of 5.5 days earlier than the LCL group, but this difference was not statistically significant. There were no group differences on neurodevelopmental outcomes. Although statistically non-significant, clinically important differences of improved weight gain and decreased hospital stay were observed with ECL. The small observed effect sizes on weight during hospitalization should be considered in future cycled light research with extremely preterm infants. © 2017 Wiley Periodicals, Inc.

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Published In

Res Nurs Health

DOI

EISSN

1098-240X

Publication Date

August 2017

Volume

40

Issue

4

Start / End Page

294 / 310

Location

United States

Related Subject Headings

  • Weight Gain
  • Time Factors
  • Phototherapy
  • Nursing
  • Male
  • Intensive Care Units, Neonatal
  • Infant, Newborn
  • Infant, Low Birth Weight
  • Infant, Extremely Premature
  • Infant
 

Citation

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Brandon, D. H., Silva, S. G., Park, J., Malcolm, W., Kamhawy, H., & Holditch-Davis, D. (2017). Timing for the Introduction of Cycled Light for Extremely Preterm Infants: A Randomized Controlled Trial. Res Nurs Health, 40(4), 294–310. https://doi.org/10.1002/nur.21797
Brandon, Debra H., Susan G. Silva, Jinhee Park, William Malcolm, Heba Kamhawy, and Diane Holditch-Davis. “Timing for the Introduction of Cycled Light for Extremely Preterm Infants: A Randomized Controlled Trial.Res Nurs Health 40, no. 4 (August 2017): 294–310. https://doi.org/10.1002/nur.21797.
Brandon DH, Silva SG, Park J, Malcolm W, Kamhawy H, Holditch-Davis D. Timing for the Introduction of Cycled Light for Extremely Preterm Infants: A Randomized Controlled Trial. Res Nurs Health. 2017 Aug;40(4):294–310.
Brandon, Debra H., et al. “Timing for the Introduction of Cycled Light for Extremely Preterm Infants: A Randomized Controlled Trial.Res Nurs Health, vol. 40, no. 4, Aug. 2017, pp. 294–310. Pubmed, doi:10.1002/nur.21797.
Brandon DH, Silva SG, Park J, Malcolm W, Kamhawy H, Holditch-Davis D. Timing for the Introduction of Cycled Light for Extremely Preterm Infants: A Randomized Controlled Trial. Res Nurs Health. 2017 Aug;40(4):294–310.
Journal cover image

Published In

Res Nurs Health

DOI

EISSN

1098-240X

Publication Date

August 2017

Volume

40

Issue

4

Start / End Page

294 / 310

Location

United States

Related Subject Headings

  • Weight Gain
  • Time Factors
  • Phototherapy
  • Nursing
  • Male
  • Intensive Care Units, Neonatal
  • Infant, Newborn
  • Infant, Low Birth Weight
  • Infant, Extremely Premature
  • Infant