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A new classification of pattern hair loss that is universal for men and women: Basic and specific (BASP) classification - 19/08/11

Doi : 10.1016/j.jaad.2006.12.029 
Won-Soo Lee, MD, PhD a, , Byung In Ro, MD, PhD b, Seung Phil Hong, MD a, Hana Bak, MD c, Woo-Young Sim, MD, PhD d, Do Won Kim, MD, PhD e, Jang Kyu Park, MD, PhD f, Chull-Wan Ihm, MD, PhD g, Hee Chul Eun, MD, PhD h, Oh Sang Kwon, MD, PhD h, Gwang Seong Choi, MD, PhD i, Young Chul Kye, MD, PhD j, Tae Young Yoon, MD, PhD k, Seong-Jin Kim, MD, PhD l, Hyung Ok Kim, MD, PhD m, Hoon Kang, MD, PhD m, Jawoong Goo, MD a, Seok-Yong Ahn, MD a, Minjeong Kim, MD a, Soo Young Jeon, MD a, Tak Heon Oh, MD a
a From the Department of Dermatology and Institute of Hair and Cosmetic Medicine, Yonsei University, Wonju College of Medicine, Wonju 
b Department of Dermatology, College of Medicine, Chung-Ang University, Seoul 
c Asan Medical Center, University of Ulsan College of Medicine, Seoul 
d Kyung Hee University, Seoul 
e Kyungpook National University School of Medicine, Daegu 
f Chungnam National University College of Medicine, Daejeon 
g Chonbuk National University Medical School, Jeonju 
h Seoul National University College of Medicine, Seoul 
i Inha University School of Medicine, Incheon 
j Korea University, Seoul 
k Chungbuk National University, Choengju 
l Chonnam National University Medical School, Gwangju 
m The Catholic University of Korea, Seoul 

Reprint requests: Won-Soo Lee, MD, Department of Dermatology, Yonsei University Wonju College of Medicine, 162 Ilsan-Dong, Wonju, 220-701, Korea.

Wonju, Seoul, Daegu, Daejeon, Jeonju, Incheon, Choengju, and Gwangju, Korea

Abstract

Background

Pattern hair loss (PHL) can be classified into several patterns. Currently, the Hamilton–Norwood classification system for men and the Ludwig grade system for women are commonly used to describe patterns of hair loss. However, these pre-existing classifications have some limitations.

Objective

To establish an acceptable, universal, and accurate standard of both male and female pattern hair loss and to report its use in determining the incidence of PHL.

Methods

We developed a new classification system (BASP classification) and then applied this system to classify the types of PHL. The BASP classification was based on observed patterns of hair loss. The basic (BA) types represent the shape of the anterior hairline, and the specific types (SP) represent the density of hair on distinct areas (frontal and vertex). There are four basic types (L, M, C, and U) and two specific types (F and V). The final type is decided by the combination of the assigned basic and specific types. Between November 2004 and June 2005, 2213 Korean subjects, comprised of 1768 males and 445 females, were classified according to the BASP classification at 13 university dermatologic centers nationwide throughout South Korea, as a multicenter study of the Korean Hair Research Society.

Results

For both sexes, the majority of patients enrolled in the study were in the third and fourth decade of life (65.1% of males and 56.68% of females). In males, the older group as well as the younger group in the study were more likely to have little recession of the frontal hairline (classified as type M12) and diffuse thinning over the top of scalp (type F12). The women in the study developed typical female PHL.

Limitations

The subjects of our study were mostly outpatients and some inpatients who complained about hair loss, not the general population of Korea.

Conclusion

The BASP classification is a new stepwise, systematic, and universal classification system for PHL, regardless of sex.

Le texte complet de cet article est disponible en PDF.

Plan


 Supported by the 2004 Hair Research Grant of the Korean Dermatological Association.
Conflicts of interest: None declared.


© 2007  American Academy of Dermatology, Inc.. Publié par Elsevier Masson SAS. Tous droits réservés.
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Vol 57 - N° 1

P. 37-46 - juillet 2007 Retour au numéro
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