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. 2020 Jan 19;26(4):542–557. doi: 10.1111/srt.12827

Table 2.

The data in first two columns show units applicable to a range of hair parameters like in Table 1, and the 3rd column separates the two treatment groups (minoxidil 5% topical solution; MTS (n = 7) vs control lotion (n = 15)). Table displays first thinnest hair data (nano‐hair <20 µm) followed by thicker hair data separated into anagen (bold) and telogen (italic) and finally shedding or exogen hair and lastly growth rates (LHGR) of thinner and thicker hair fibres

Units Parameter Group topical No‐treatment On‐topical Off‐topical 3 mo
Baseline (m0) Change from baseline m0 Change from m0 Change from m3
m1 m2 m3 m6 vs m0 m6 vs m3
Mean SD   P   P   P   P   P
n/cm2 Nano‐hair <20 µm MTS 34.7 26 −2.2   −5.1   −8.4   −18.6 * −10.1  
    Control 23.9 6.1 3.4   −3.6   4   2   −1.9  
n/cm2 Anagen ≥20 µm MTS 128.8 65 −1.9   57.5 * 81.2 *** −29.6   −110.8 ***
    Control 96.7 44.7 0.8   11   5.5   −4   −9.5  
  Telogen ≥20 µm MTS 104.5 36.3 −6.6   −15.2   33.2 * 47.7 * 80.9 ***
    Control 108.1 52.1 −9.8   −0.4   5.2   7.4   12.6  
n/cm2 Anagen ≥30 µm MTS 108.5 61.9 0   46.4 * 68.5 ** −22.5   −91 ***
    Control 79.8 44.8 3.4   4.8   6.5   −3.8   −10.2  
  Telogen ≥30 µm MTS 67.4 40 2.7   −10.3   14.4   53.1 * 67.5 *
    Control 41.7 13.8 1   4.1   2.4   9.9   7.5  
n/cm2 Anagen ≥40 µm MTS 82.4 57 −1.7   36.6 * 57.7 ** −12.6   −70.3 ***
    Control 69.2 48 1.3   2.2   1.9   −2.3   −4.3  
  Telogen ≥40 µm MTS 34.8 19.9 −2   −5.1   −5 * 40.9 * 45.8 **
    Control 20.4 10.9 −2.4   1.2   4.5   4.4   0  
n/cm2 Anagen ≥50 µm MTS 68 50.6 −0.9   26.9   44.2 ** −8.7   −52.8 **
    Control 60.8 49.3 2.9   3.3   1.5   −1.9   −3.4  
  Telogen ≥50 µm MTS 21.3 10.9 −0.2   −2.4   ‐5 * 26.6 * 31.6 **
    Control 12.8 10.6 −1.3   −1.3   4   1.4   −2.6  
n/cm2 Exogen MTS 10.143 5.24 6.57   15 * −0.29   2.29   2.57  
    Control 11.53 8.77 2   1.99   2.19   1.72   −0.47  
LHGR Hair diameter (D; µm)                          
µm/24 h 30 µm ≤ D < 60 µm MTS 256.2 53.3 −13.9   −11.7   19.1   2.2   −16.9  
    Control 267.5 41.5 −20.5   −7.8   7.6   −34.9   −42.5  
µm/24 h D ≥ 60 µm MTS 369 39.2 −56.3   −45.1   −64.5   −50.9   13.5  
    Control 351.7 64.9 −20.4   7.7   14.1   −33.9   −48.1  

Descriptive statistics of absolute values (mean and SD) are shown at baseline before drug administration (m0) and there were no statistically significant differences between MTS and control lotion groups at baseline. Changes from baseline recorded during the 3 mo of combined drug administration (oral finasteride during “on‐topical” period; m1, m2 and m3) are shown each month and are followed by a display of P values *≤.05, **≤.005, ***≤.0005. The last columns show changes during maintenance of oral drug intake after weaning of topicals (“off‐topical” 3 mo) as compared either to baseline (change from m0; m6 vs m0) or to the last topical applications (change from m3; m6 vs m3), and each time point is followed by the P values. At m3 in the group applying the topical lotion containing MTS5%, there were significant increases in anagen hair in all classes of diameter and decreases in all telogen hair counts (except those grouping diameters ≥30 µm) indicating recruitment of scalp hair follicles into the growth phase. Of note is that all absolute anagen increases exceeded absolute telogen decreases suggesting recruitment of dormant‐empty hair follicles. The collection of exogen hair raised as from m1 but statistically significantly peaked at m2. There was no modification in LHGR. After weaning of topicals but maintenance of oral drug intake, all telogen counts significantly increased as compared to baseline (m6 vs m0), while all anagen counts dropped and all telogen increased at m6 in comparison with m3 (m6 vs m3). The “post‐minoxidil rebound” is reflected by increased resting hair (m6 vs m3 and m6 vs m0). Oral drug with control lotion did not statistically significantly fluctuate during the 6‐mo follow‐up.