评价科恩横截面积毛发测量仪测量头发数量的效果。

Evaluation of Cohen's cross-section trichometer for measuring hair quantity.

机构信息

Department of Medicine, University of Maastricht, Maastricht, The Netherlands.

出版信息

Dermatol Surg. 2012 Apr;38(4):631-4. doi: 10.1111/j.1524-4725.2011.02176.x. Epub 2012 Jan 23.

DOI:10.1111/j.1524-4725.2011.02176.x

PMID:22268669

Abstract

BACKGROUND

Until now, there has been no reliable, simple method available for measuring hair quantity that is suitable in clinical practice. Recently, the cross-section trichometer by Cohen has been introduced. This study was designed to test its clinical utility.

METHODS

The hair mass index (HMI) is ratio of the cross-sectional area of an isolated bundle of hair and the premeasured area of skin from which it was taken using the trichometer device. The intra- and interobserver reproducibility of measurements at the same location and after relocation were evaluated.

RESULTS

For intraobserver reproducibility, the HMI ranged from 3 to 120 (mean difference .2, 95% confidence interval [CI] = -4.7-5.1, correlation coefficient [r] = .99. For interobserver reproducibility, the HMI ranged from 18 to 119 (mean difference -.4, 95% CI = -8,0-7,2, r = .98). With relocation, the HMI ranged from 2 to 113 (mean difference -1.0, 95% CI = -10.1-8.1, r = .97). Measurements took 5-10 minutes per area.

CONCLUSION

Measurements were simple to perform, and the data showed high reproducibility. The trichometer is a promising technology for hair quantity measurements and has multiple clinical and research applications.

摘要

背景

到目前为止，临床上还没有一种可靠、简单的方法可以测量头发数量。最近，Cohen 的横截面毛发计已经被引入。本研究旨在测试其临床实用性。

方法

毛发质量指数（HMI）是使用毛发计装置从头皮上切取的一束头发的横截面积与预先测量的头皮面积的比值。评估了在同一部位和重新定位后的测量的观察者内和观察者间的可重复性。

结果

对于观察者内的可重复性，HMI 范围为 3 到 120（平均差异 0.2，95%置信区间 [CI] = -4.7-5.1，相关系数 [r] =.99）。对于观察者间的可重复性，HMI 范围为 18 到 119（平均差异 -0.4，95%CI = -8.0-7.2，r =.98）。重新定位后，HMI 范围为 2 到 113（平均差异 -1.0，95%CI = -10.1-8.1，r =.97）。每个区域的测量需要 5-10 分钟。