Table 2.

Epidermal function

Age group, years	Gender	TEWL on the left forearm	Hydration on the left forearm	pH on the left forearm	TEWL on the right shin	Hydration on the right shin	pH on the right shin
21–30	Males	11.60±0.47	19.46±0.80	4.67±0.04	9.67±0.36a	13.79±0.64	4.86±0.04
	Females	10.83±0.37	17.85±0.59	4.71±0.03	7.78±0.21	14.04±0.46	4.83±0.03
31–40	Males	13.13±0.97	15.91±1.40	4.96±0.06	10.01±0.52b	11.31±0.90	5.04±0.07
	Females	11.00±0.42	14.69±0.69	4.90±0.04	8.41±0.39	13.06±0.66	5.01±0.04
41–50	Males	14.59±1.01	14.43±1.43	5.11±0.05	10.09±0.67c	9.43±0.94	5.23±0.06
	Females	12.22±0.64	12.59±0.92	5.21±0.04	8.47±0.46	9.35±0.75	5.28±0.04
51–60	Males	14.04±1.18	15.42±1.56d	5.29±0.04	10.54±0.96	10.47±1.25	5.44±0.05
	Females	13.63±1.16	10.43±1.07	5.46±0.04	9.08±0.84	8.92±0.80	5.49±0.03
61–70	Males	12.36±0.60	11.77±0.95	5.53±0.05	9.17±0.40	7.09±0.60	5.67±0.04
	Females	12.75±0.77	12.58±1.06	5.51±0.06	9.83±0.50	8.18±0.72	5.69±0.04
71–80	Males	10.99±0.61	9.89±0.95d	5.55±0.07	9.17±0.49	5.65±0.58	5.70±0.06d
	Females	11.71±0.74	6.55±0.84	5.76±0.08	9.69±0.80	5.10±0.70	5.89±0.06
>80	Males	11.15±1.33	6.95±0.98	5.78±0.07	10.33±1.05	4.90±0.73	6.11±0.07c
	Females	10.78±0.73	8.67±1.29	5.86±0.06	8.37±0.83	5.63±0.94	5.80±0.06

Data are expressed as mean ± SEM. An unpaired t test was used to determine the significance between two groups.

^ap < 0.0001, versus females.

^bp < 0.001.

^cp < 0.01.

^dp < 0.05.