36 citations
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December 2016 in “Journal of The American Academy of Dermatology” In this study, researchers evaluated the hair pull test and found that normal values should be reduced to two hairs or fewer, with no significant impact from hair washing, brushing, or lifestyle factors such as hair texture and medication use.
July 2021 in “Australasian Journal of Dermatology” This manuscript describes a proposed ‘trichoscopy-assisted hair pull test’ that enhances the diagnosis of hair loss conditions by allowing immediate examination of proximal hair shafts and roots in patients with a positive hair pull test.
4 citations
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December 2020 in “Journal of the American Academy of Dermatology” Pulling 2 or fewer hairs is normal for all hair types, including Afro- and Asian-textured hair.
December 2023 in “Minia Journal of Medical Research” In this study, researchers found that transverse sections of alopecia areata lesions showed significantly more terminal hair follicles with perifollicular lymphocytic infiltrate compared to longitudinal sections, and this immune infiltration positively correlated with the positive hair pull test in patients.
January 2015 in “Springer eBooks” This chapter describes two simple, noninvasive methods — the pull test and modified wash test — which can diagnose and assess the severity of female hair loss, including conditions like telogen effluvium and androgenetic alopecia.