期刊
SKIN APPENDAGE DISORDERS
卷 -, 期 -, 页码 -出版社
KARGER
DOI: 10.1159/000525137
关键词
Alopecia; Minoxidil; Meta-regression; Dosage
类别
This study provides new evidence for a positive dose-dependent association between the use of low-dose oral minoxidil (LDOM) and changes in hair diameter, hair density, risk of hypertrichosis, and cardiovascular adverse events in individuals with androgenetic alopecia (AGA).
Background: Recently, low-dose oral minoxidil (LDOM) has entered the landscape of therapies for androgenetic alopecia (AGA). We determined whether using LDOM is associated with improving AGA in a dose-dependent manner; secondarily, we examined whether a dose-dependent association also exists for safety. Methods: Systematic searches were conducted in PubMed and Scopus to identify studies that would be eligible for our quantitative analyses; the logistics of our analyses was determined by the data we gathered. Results: Six studies were eligible for quantitative analyses; we conducted meta-regressions. We found that, for persons with AGA, increasing the dosage of LDOM by 1 mg/day was - after six months - significantly associated with an expected sex-adjusted increase in hair diameter (mean difference = 1.4 mu m, p = 0.01), total hair density (mean difference = 47.1 hairs/cm(2), p = 0.007), terminal hair density (mean difference = 9.1 hairs/cm(2), p = 0.001), risk of hypertrichosis (mean difference = 17.9%, p = 0.006), and cardiovascular adverse events (mean difference = 4.8%, p = 0.004). Conclusions: Our study produced new evidence as our work is the first to show a positive dose-dependent association between the use of LDOM and change in hair diameter, hair density, risk of hypertrichosis, and cardiovascular adverse events for persons with AGA. Future randomized trials could produce causal evidence that would corroborate these dose-dependent associations.
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