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What women want - quantifying the perception of hair amount: an analysis of hair diameter and density changes with age in Caucasian women.
MedLine Citation:
PMID:  22524482     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Background:  It has long been known women lose satisfaction with their hair with aging. Our data show that Caucasian women perceive a decrease in hair amount in their mid-40s with a further decrease in the mid- to late-50s, which leads to this dissatisfaction. Neither loss of density (hairs/cm(2) ) nor shaft diameter alone can fully account for this perception. A new metric, "hair amount", is proposed as a quantitative metric combining the impact of both density and diameter on the perception of hair loss. Objective:  Creation of a single parameter combining the contribution of diameter and density to perception of female age-related hair loss. Methods:  1099 Caucasian women (ages 18-66) with self-perceived hair loss and 315 Caucasian women (ages 17-86) with no complaint of hair loss were evaluated. Scalp hair diameter was measured using optical fiber diameter and image analysis. Scalp hair density was measured by phototrichogram with manual or automated counting. Results:  Parietal scalp hair diameter increased from ages 20 to 40-45 years then decreased. Hair density was highest in the youngest group, age 20-30, and decreased thereafter with increasing rate. In women self-perceiving hair loss, the rate of decrease in density was significantly faster than for women with no self-perception of hair loss. The combined metric "hair amount" was relatively constant at younger ages, increasing very slightly to age 35, then decreasing significantly. Conclusions:  Increasing hair shaft diameter offsets decreasing hair density through the mid-thirties. After that, a lower rate of diameter increase combined with the decrease in density begins to significantly impact the perception of hair amount so that thinning becomes increasingly more noticeable in the mid-40s to the mid- to late-50s. Quantitative determination of hair amount is a useful tool to combine the contributions of hair density and diameter to women's perception of age-related hair loss.
Authors:
C Robbins; P Mirmirani; A G Messenger; M P Birch; R S Youngquist; Makio Tamura; T Filloon; F Luo; T L Dawson Jr
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-4-23
Journal Detail:
Title:  The British journal of dermatology     Volume:  -     ISSN:  1365-2133     ISO Abbreviation:  -     Publication Date:  2012 Apr 
Date Detail:
Created Date:  2012-4-24     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0004041     Medline TA:  Br J Dermatol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 British Association of Dermatologists.
Affiliation:
12425 Lake Ridge Circle, Clermont, FL 34711. Department of Dermatology: The Permanente Medical Group (Vallejo, CA), University of California, San Francisco (San Francisco, CA). Royal Hallamshire Hospital, Sheffield, S10 2JF, UK. Procter & Gamble Beauty and Grooming (Cincinnati, OH).
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