Table 3. Correlation between the Corneometer and hydration probe with subgroup analysis of the XSS.

Measurement location	PCC (95% confidence interval)
	Overall	Group I (XSS=0)	Group II (XSS ≥1)
Ventral forearm	0.72 (0.64–0.78)	0.65 (0.42–0.80)	0.79 (0.64–0.80)
Dorsal forearm	0.74 (0.66–0.80)	0.74 (0.56–0.86)	0.75 (0.66–0.81)
Shin	0.75 (0.68–0.81)	0.79 (0.63–0.88)	0.74 (0.65–0.81)
Entire arm	0.74 (0.67–0.80)	0.71 (0.52–0.84)	0.75 (0.66–0.82)
Entire body	0.75 (0.67–0.81)	0.74 (0.55–0.85)	0.76 (0.67–0.82)

Entire arm means ventral and dorsal forearm, and entire body means all 3 sites measured.

PCC: Pearson’s correlation coefficient, XSS: xerosis severity scale.