Table 2.
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.