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Table 2 Correlation coefficients between skin features of Japanese healthy females and the ratio of Cer subclasses

From: The ceramide [NP]/[NS] ratio in the stratum corneum is a potential marker for skin properties and epidermal differentiation

Correlation coefficients (rS)

  

TEWL (gm−2 h−1)

Capacitance (AU)

Surface Texture (AU)

Scaling (AU)

L* (AU)

a* (AU)

b* (AU)

Level (ng/μg protein)

Total Cer

−0.087

0.284**

0.166*

−0.135

0.166*

0.015

−0.232**

NP

−0.199**

0.289**

0.286**

−0.188**

0.270**

−0.135

−0.123

NS

0.199**

0.181**

−0.004

−0.073

0.033

0.148*

−0.206**

Ratio (AU)

NP/NS

−0.369**

0.156*

0.343**

−0.167*

0.254**

−0.227**

0.018

NH/NS

−0.445**

0.162*

0.238**

−0.121

0.148*

−0.142*

0.023

NP/AS

−0.330**

0.121

0.269**

−0.111

0.181**

−0.198**

0.074

NH/AS

−0.384**

0.129

0.192**

−0.085

0.076

−0.115

0.107

NDS/AS

−0.275**

0.030

0.024

0.102

−0.087

−0.028

0.119

AH/AS

−0.482**

0.057

0.056

0.114

−0.010

−0.100

0.132

EOP/AS

−0.241**

0.201**

−0.166*

0.199**

0.122

−0.153*

0.011

  1. Correlation coefficients between SC functional parameters (TEWL and capacitance), skin surface texture, scaling, color parameters (L*(lightness), a*(redness), b*((yellowness)) and the levels or ratios of Cer subclasses in the facial skin of healthy Japanese female subjects were evaluated. * and ** denote significant correlations of p < 0.05 and p < 0.01, respectively. Spearman’s correlation, the correlation coefficients (rS) and p-values are shown. TEWL, transepidermal water loss; AU, arbitrary units