Assessing Biophysical and Physiological Profiles of Scalp Seborrheic Dermatitis in the Thai Population

Table 3

Biophysical properties among various severity of scalp seborrheic dermatitis cases and control.

Variables	Mild (n = 14)	Moderate (n = 16)	Severe (n = 12)	Control (n = 40)	P value
Age, years
mean ± SD	33.5 (5.5)	36.1 (6.9)	34.9 (6.4)	32.4 (6.6)	0.24
Sex
male:female	6:8	5:11	4:8	12:28	0.84
Duration of disease, years
median (range)	4 (1-10)	3.5 (1-11)	4 (1-9)	-	0.96
TEWL, g/h/m^2
mean ± SD	13.52 ± 4.65	13.89 ± 4.91	14.25 ± 5.24	11.66 ± 3.93	0.16
SCH, units
mean ± SD	6.25 ± 1.24	5.91 ± 1.19	5.46 ± 1.25	6.42 ± 1.92	0.25
pH
mean ± SD	4.92 ± 0.46	5.05 ± 0.65	4.94 ± 0.51	5.19 ± 0.62	0.56
Skin surface lipid, units
mean ± SD	32.41 ± 6.52	35.19 ± 7.95	35.93 ± 6.99	29.56 ± 6.35	<0.05
Roughness, units
mean ± SD	11.26 ± 3.25	11.91 ± 3.65	11.46 ± 3.59	10.85 ± 2.61	0.66

SCH, stratum corneum hydration; TEWL, transepidermal water loss. : statistically significant.