Open AccessTwo‐point scoring method for the evaluation of pattern hair loss by phototrichogram using a headband and a tapeline
Author(s) -
Lee SiHyung,
Kang JinSoo,
Jeon In Kyung,
Lee Hye Sun,
Cho Sung Bin
Publication year - 2013
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.12031
Subject(s) - reproducibility , intraclass correlation , reliability (semiconductor) , scalp , coefficient of variation , medicine , point (geometry) , statistics , nuclear medicine , mathematics , surgery , physics , power (physics) , geometry , quantum mechanics
Background A phototrichogram scalp measurement method using a headband and a tapeline was introduced as a non‐invasive and economical measuring technique. Objective To evaluate the reliability and reproducibility of the two‐point scoring method by phototrichogram using a headband and a tapeline. Methods The scalp hair of seven volunteers were measured in triplicate at the ‘P’ and ‘V’ points by three dermatologists. To calculate the degree of disease progression, we used a two‐point (‘P’ point and ‘V’ point) scoring method. Statistical analyses for the evaluation of inter‐ and intra‐investigator reliability and variability were performed. Results Overall intraclass correlation coefficients ( ICCs ) of intra‐investigator reliability demonstrated ICCs with excellent agreement for all parameters, including the number and thickness of hair at the ‘P’ and ‘V’ points, as well as calculated degree of disease progression. ICCs of inter‐investigator reliability demonstrated ICCs with excellent agreement in all parameters, except mean hair thickness at the ‘P’ point. Overall intra‐investigator variability demonstrated coefficients of variation ( CVs ) ranging from 2.6% to 9.8%, whereas inter‐investigator variability demonstrated CV s ranging from 2.9% to 6.3%. Conclusion We suggest that a two‐point scoring using our method is a non‐invasive and economical measurement technique with high reliability and reproducibility.