Reliability and Minimal Detectable Change of the Styku 3D Body Scanner

ABSTRACT

The objective of this study was to assess the reliability and minimal detectable change (MDC) of the Styku S100 3-dimensional (3D) scanner. Thirty-three participants completed two visits separated by 1–3 days; at each visit, two scans were performed. Intra-class correlation co-efficients (ICCs) and MDC values based on a 90% confidence interval (MDC₉₀) were calculated. For body fat percentage, within-day ICC and MDC₉₀ values were 0.997 and 1.1%, respectively, and these values changed to 0.989 and 2% when using single scans on separate days. For 21 circumference sites, 10 of the within-day ICCs were ≥ 0.99 and 20 of the MDC₉₀ values were < 2 cm. Comparatively, five ICCs were ≥ 0.99 and 15 MDC₉₀ values were < 2 cm when using single scans on separate days. In conclusion, between-visit differences of 1-2% for body fat percentage and 1–2 cm for most circumference values are needed to exceed typical measurement error.

KEYWORDS:

• Anthropometrics
• body composition
• circumferences
• exercise science
• fitness

Conflicts of Interest

The authors declare that they have no conflict of interest.

Additional information

Funding

Financial support for this project was provided by the Perry Honors College Undergraduate Research and Creativity Grant program at Old Dominion University.