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. 2021 Jan 11;7:608903. doi: 10.3389/fmed.2020.608903

Table 2.

Comparison of changes in skin properties in the full analysis set population.

Variable Observed values Changes from baseline
CTP (n = 36) CG (n = 38) CTP (n = 36) Pa CG (n = 38) Pa Pb Pc Pd Pe
Transepidermal water loss (g/m2/h)
Baseline 6.08 ± 2.1 5.64 ± 1.4
At 6 weeks 4.43 ± 1.6 4.25 ± 1.1 −1.65 ± 1.9 <0.001 −1.39 ± 1.9 <0.001 0.577 0.675 0.411 0.445
At 12 weeks 5.14 ± 1.5 5.31 ± 1.5 −0.94 ± 1.8 0.004 −0.33 ± 1.9 0.297 0.168 0.024 0.032 0.031
Skin hydration (A.U.)
Baseline 192.5 ± 21.4 199.7 ± 21.9
At 6 weeks 199.2 ± 19.6 200.1 ± 24.0 6.73 ± 22.0 0.076 0.45 ± 21.9 0.900 0.223 0.243 0.204 0.214
At 12 weeks 209.0 ± 18.7 212.1 ± 16.0 16.50 ± 21.7 <0.001 12.44 ± 21.7 <0.001 0.423 0.325 0.335 0.278
Skin elasticity (mm)
Baseline 0.40 ± 0.11 0.42 ± 0.10
At 6 weeks 0.35 ± 0.10 0.36 ± 0.10 −0.04 ± 0.1 0.050 −0.06 ± 0.1 0.002 0.574 0.514 0.557 0.642
At 12 weeks 0.33 ± 0.10 0.36 ± 0.09 −0.07 ± 0.1 <0.001 −0.05 ± 0.1 0.002 0.480 0.471 0.546 0.603
Lt. crow's–feet visual score
Baseline 2.25 ± 0.73 2.47 ± 0.98
At 6 weeks 1.94 ± 0.63 1.97 ± 0.88 −0.31 ± 0.6 0.003 −0.50 ± 0.6 <0.001 0.145 0.207 0.148 0.208
At 12 weeks 1.61 ± 0.60 1.71 ± 0.73 −0.64 ± 0.6 <0.001 −0.76± 0.5 <0.001 0.349 0.307 0.303 0.312
Rt. crow's-feet visual score
Baseline 2.11 ± 0.78 2.24 ± 0.94
At 6 weeks 1.61 ± 0.64 1.82 ± 0.83 −0.50 ± 0.6 <0.001 −0.42 ± 0.5 <0.001 0.524 0.417 0.512 0.431
At 12 weeks 1.44 ± 0.56 1.47 ± 0.65 −0.67 ± 0.6 <0.001 −0.76 ± 0.6 <0.001 0.514 0.497 0.537 0.564
Lt. wrinkles by vision meter
Baseline 28.0 ± 6.2 25.8 ± 6.0
At 6 weeks 31.4 ± 6.9 29.3 ± 5.4 3.33 ± 9.2 0.037 3.44 ± 8.3 0.011 0.960 0.797 0.985 0.897
At 12 weeks 29.8 ± 4.8 30.2 ± 6.1 1.82 ± 7.1 0.131 4.41 ± 7.9 0.002 0.141 0.181 0.241 0.286
Rt. wrinkles by vision meter
Baseline 27.2 ± 6.0 27.9 ± 6.8
At 6 weeks 29.3 ± 5.4 28.4 ± 6.1 2.15 ± 7.9 0.117 0.57 ± 8.0 0.663 0.406 0.390 0.334 0.395
At 12 weeks 29.3 ± 5.0 30.5 ± 7.0 2.08 ± 7.4 0.100 2.66 ± 8.6 0.065 0.758 0.894 0.976 0.942

Values are presented as mean ± SD.

a

Paired t-test.

b

Two-sample t-test.

c

Repeated measures ANCOVA (adjusted for temperature and humidity).

d

ANCOVA (adjusted for ultraviolet A).

e

ANCOVA (adjusted for temperature, high temperature, and ultraviolet A).