Table 1.
Comparison of biophysical parameters between lesion and control skin in patients with pityriasis rosea.
| Parameter (units) | Lesion, mean ± SD | Control (mean of perilesional and symmetrical skin), mean ± SD | p-value (paired t test) |
|---|---|---|---|
| Hydration (arbitrary) | 46.30 ± 18.57 | 62.816 ± 16.22 | <.001 |
| TEWL (g/m2/h) | 17.23 ± 10.65 | 8.88 ± 4.37 | .001 |
| Friction (arbitrary) | 288.41 ± 237.05 | 376.827 ± 238.95 | .075 |
| pH (arbitrary) | 6.30 ± 0.77 | 5.77 ± 0.71 | <.001 |
| Sebum (µg/cm2) | 14.14 ± 29.89 | 9.55 ± 18.21 | .398 |
| Melanin content (arbitrary) | 148.22 ± 43.52 | 144.68 ± 39.76 | .700 |
| Erythema index (arbitrary) | 407.63 ± 73.49 | 219.618 ± 46.38 | <.001 |
| Temperature (centigrade) | 31.43 ± 1.24 | 31.29 ± 1.02 | .461 |
| R0 (arbitrary) | 0.26 ± 0.09 | 0.30 ± 0.08 | .003 |
| R2 (arbitrary) | 0.67 ± 0.13 | 0.79 ± 0.09 | .001 |
| R5 (arbitrary) | 0.39 ± 0.13 | 0.51 ± 0.17 | .003 |
SD, standard deviation; TEWL, transepidermal water loss.