Table 2. Test-retest reliability of the Corneometer and hydration probe.

Measurement location	Device	ICC	95% confidence interval
Ventral forearm	Corneometer	0.971	0.963–0.978
	Hydration probe	0.983	0.979–0.987
Dorsal forearm	Corneometer	0.970	0.962–0.977
	Hydration probe	0.984	0.980–0.988
Shin	Corneometer	0.954	0.941–0.965
	Hydration probe	0.980	0.974–0.984
Entire arm	Corneometer	0.971	0.965–0.975
	Hydration probe	0.984	0.981–0.986
Entire body	Corneometer	0.966	0.961–0.971
	Hydration probe	0.986	0.984–0.988

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

ICC: intraclass correlation coefficient.