Table 2.
Skin biophysical parameters on right cheek of smokers and non-smokers (control group)
| Parameter (unit) | Smoker group Mean ± SD | Control group Mean ± SD | p-value (independent sample-+T test) |
|---|---|---|---|
| Hydration (arbitrary) | 63.25±15.03 | 63.90±10.90 | 0.86 |
| TEWL (g/m2/h ) | 15.19±8.77 | 14.70±5.89 | 0.81 |
| Friction (arbitrary) | 557.33±230.06 | 536.88±169.23 | 0.72 |
| pH (arbitrary) | 5.00±0.45 | 5.11±0.48 | 0.44 |
| Sebum (μg/cm2) | 110.64±93.04 | 105.95±55.17 | 0.83 |
| Melanin content (arbitrary) | 222.47±72.62 | 206.26±33.11 | 0.29 |
| Erythema (arbitrary) | 510.90±47.69 | 506.24±58.34 | 0.75 |
| R0 (arbitrary) | 0.192±0.076 | 0.216±0.074 | 0.28 |
| R2 (arbitrary) | 0.664±0.076 | 0.662±0.112 | 0.92 |
| R5 (arbitrary) | 0.428±0.145 | 0.392±0.155 | 0.39 |
| Epidermis thickness (μm) | 183.54±112.76 | 143.32±32.72 | 0.11 |
| Epidermis density | 102.40±21.30 | 112.27±37.24 | 0.27 |
| Dermis thickness (μm) | 2361.54±337.08 | 2105.95±320.18 | 0.00 |
| Dermis density | 13.68±7.13 | 18.50±12.93 | 0.12 |
SD = standard deviation