Susan B Sisson, Emily Helms, Shanon Casperson, Saima Hasnin, Stephanie Jilcott Pitts, Virginia C Stage, Christopher R Long, Taren Massey-Swindle, Dipti A Dev, Ashlea Braun, Jodi D Stookey, Rowena Cape, Jonathan Baldwin
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引用次数: 0
Abstract
Objective: To examine the intra- and inter-device reliability of devices using pressure-mediated reflection spectroscopy (the Veggie Meter®).
Design: A cross-sectional research study was conducted across 8 sites in the United States. Using two Veggie Meters® at each site, participants completed five, counter-balanced pairs of finger scans. Intra-device comparisons included intra-class correlation coefficients (ICC) and calculation of the Coefficient of Variation (CV) and 95% confidence intervals (CI) of each device/site; hypothesized to be ≤ 6%. Inter-device comparisons included ICC, Absolute Relative Differences (ARD) and 95% CI, and equivalence; both hypothesized to be ≤ 10%.
Setting: Eight sites across the United States.
Participants: Across sites, participants' (n=282) average age ranged 24.7-39.0 years; sex ranged 60.0%-85.7% women, and Non-Hispanic White ranged 20.0%-94.3%.
Results: Intra-device ICC ranged from 0.77-0.99. The CV ranged from 6.2%-14.2%, with an average of 8.8%. A majority (63%; n=10) of the Veggie Meter® devices had significantly higher CV from the hypothesized 6%. Inter-device ICC ranged from 0.58-0.94. The Absolute Relative Difference (ARD) ranged from 7.5%-22.0%, with an average of 13.9%. ARD in a majority (n=5) of sites was significantly higher than the hypothesized 10%. Five sites (63%) demonstrated equivalence below the hypothesized 10%.
Conclusions: Our study demonstrates the intra-device and inter-device reliability to be moderate to high, as per ICC. The observed margin of difference within a device was up to 14%, with an average of 9%. The observed margin of difference between devices was up to 22% with an average of 14% between devices.
期刊介绍:
Public Health Nutrition provides an international peer-reviewed forum for the publication and dissemination of research and scholarship aimed at understanding the causes of, and approaches and solutions to nutrition-related public health achievements, situations and problems around the world. The journal publishes original and commissioned articles, commentaries and discussion papers for debate. The journal is of interest to epidemiologists and health promotion specialists interested in the role of nutrition in disease prevention; academics and those involved in fieldwork and the application of research to identify practical solutions to important public health problems.