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Open AccessArticle

Reliability of Heterochromatic Flicker Photometry in Measuring Macular Pigment Optical Density among Preadolescent Children

1
Division of Nutritional Sciences, University of Illinois, Louise Freer Hall, 906 S Goodwin Avenue, Urbana, IL 61801, USA
2
Department of Kinesiology and Community Health, University of Illinois, Louise Freer Hall, 906 S Goodwin Avenue, Urbana, IL 61801, USA
3
Department of Psychology, University of Georgia, 125 Baldwin Street, Athens, GA 30602, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Christopher J. Smith
Foods 2015, 4(4), 594-604; https://doi.org/10.3390/foods4040594
Received: 15 September 2015 / Accepted: 13 October 2015 / Published: 16 October 2015
(This article belongs to the Special Issue Dietary Carotenoids and The Nervous System)
Macular pigment optical density (MPOD)—assessed using customized heterochromatic flicker photometry (cHFP)—is related to better cognition and brain lutein among adults. However, the reliability of MPOD assessed by cHFP has not been investigated in children. We assessed inter-session reliability of MPOD using modified cHFP. 7–10-year-olds (n = 66) underwent cHFP over 2 visits using 11 examiners. Reliability was also assessed in a subsample (n = 46) with only 2 examiners. Among all participants, there was no significant difference between the two sessions (p = 0.59—session 1: 0.61 ± 0.28; session 2: 0.62 ± 0.27). There was no significant difference in the MPOD of boys vs. girls (p = 0.56). There was a significant correlation between sessions (Y = 0.52x + 0.31; R2 = 0.29, p ≤ 0.005), with a reliability of 0.70 (Cronbach’s α). Among the subsample with 2 examiners, there was a significant correlation between sessions (Y = 0.54x + 0.31; R2 = 0.32, p < 0.005), with a reliability of 0.72 (Cronbach’s α). In conclusion, there is moderate reliability for modified cHFP to measure MPOD in preadolescents. These findings provide support for future studies aiming to conduct noninvasive assessments of retinal xanthophylls and study their association with cognition during childhood. View Full-Text
Keywords: macular pigment optical density; heterochromatic flicker photometry; retinal lutein macular pigment optical density; heterochromatic flicker photometry; retinal lutein
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McCorkle, S.M.; Raine, L.B.; Hammond, B.R., Jr.; Renzi-Hammond, L.; Hillman, C.H.; Khan, N.A. Reliability of Heterochromatic Flicker Photometry in Measuring Macular Pigment Optical Density among Preadolescent Children. Foods 2015, 4, 594-604.

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