Table 1.

Means and standard deviations of biophysical measurements and the statistical difference between the age groups

Notes: *P≤0.05, **P≤0.01, ***P≤0.001. Corneometry: stratum corneum hydration (arbitrary units); TEWL in g/m²/h; R_z in μm; R_max in μm; R₀ in mm; R₆ is given as a ratio; R₇ is given as a ratio.

Abbreviations: R₀, structural extensibility; R₆, portion of the viscoelasticity; R₇, elastic recovery; R_max, maximal roughness; Rz, mean depth of roughness; TEWL, transepidermal water loss; Uf, skin distensibility; Uv, skin delayed distension; Ue, skin immediate distension; Ur, skin immediate retraction.