Hair pull test: Evidence-based update and revision of guidelines

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Presentation transcript:

Hair pull test: Evidence-based update and revision of guidelines Katherine A. McDonald, BScH, Amanda J. Shelley, BScH, Sophia Colantonio, MPH, MD, Jennifer Beecker, MD, CCFP(EM), FRCPC, FAAD Journal of the American Academy of Dermatology Volume 76, Issue 3, Pages 472-477 (March 2017) DOI: 10.1016/j.jaad.2016.10.002 Copyright © 2016 American Academy of Dermatology, Inc. Terms and Conditions

Fig 1 Mean number of hairs removed during the hair pull test by time since last hair washing. There was no statistical difference between the groups. *The previous range is demonstrated for comparison. Based on the previous literature, up to 5-6 hairs were expected from hair pulls in healthy participants. Journal of the American Academy of Dermatology 2017 76, 472-477DOI: (10.1016/j.jaad.2016.10.002) Copyright © 2016 American Academy of Dermatology, Inc. Terms and Conditions

Fig 2 Mean number of hairs removed during the hair pull test by time since last hair brushing. There was no statistical difference between the groups. Journal of the American Academy of Dermatology 2017 76, 472-477DOI: (10.1016/j.jaad.2016.10.002) Copyright © 2016 American Academy of Dermatology, Inc. Terms and Conditions

Fig 3 Mean number of hairs removed during the hair pull test by age group and sex. There was no statistical difference between the groups. Journal of the American Academy of Dermatology 2017 76, 472-477DOI: (10.1016/j.jaad.2016.10.002) Copyright © 2016 American Academy of Dermatology, Inc. Terms and Conditions