Open AccessReliability and validity of two in vivo measurements for skin surface topography in aged adults
Author(s) -
Trojahn C.,
Schario M.,
Dobos G.,
BlumePeytavi U.,
Kottner J.
Publication year - 2015
Publication title -
skin research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.521
H-Index - 69
eISSN - 1600-0846
pISSN - 0909-752X
DOI - 10.1111/srt.12156
Subject(s) - forearm , surface roughness , biomedical engineering , reliability (semiconductor) , in vivo , surface finish , materials science , nuclear medicine , medicine , surgery , composite material , biology , physics , power (physics) , microbiology and biotechnology , quantum mechanics
Background The non‐contact optical methods phaseshift rapid in vivo measurement of skin ( PRIMOS ) and surface evaluation of living skin ( SELS ) are widely applied for measuring skin surface topography. The aims of the present study were to evaluate reliability and validity of these methods and to compare skin roughness intraindividually. Methods SELS and PRIMOS measurements were performed on four skin areas of the left and right volar forearms in 12 healthy elderly subjects. Reliability and correlations were analyzed for Visioscan ® and PRIMOS roughness parameters. Student's t ‐tests for estimating differences between contralateral volar forearm sites were applied. Results ICC coefficients of the Visioscan ® roughness estimates ranged between 0.50 and 0.95 and of the PRIMOS measurements between 0.01 and 1.00. The Visioscan ® parameters SE r, SE sm, Rmax, and Rz, and the PRIMOS parameters Ra, Rz, Smax, Wt, and Sz showed most significant correlations with each other and to additional roughness parameters. Mean roughness differences between contralateral forearm skin areas ranged between 0.0 ( SE sc) and 6.7 (Rmax). Conclusions The Visioscan ® parameters SE r, Rmax, and Rz showed most reliable and valid values and were largely comparable on contralateral forearm skin sites in elderly subjects. Rmax, Rz, and Ra should be preferred for measuring skin surface topography with PRIMOS .