Predictive models for gestational age, based on morphometry values of the skin at birth
| Univariate analysis | Multivariate analysis | ||
| Linear coefficient (P value) | Adjusted coefficient of correlation | P value of the model | |
| Skin over palm | |||
| Epidermal thickness (μm) | 0.867 (<0.001) | 0.655 | 0.94 (p<0.001) |
| Dermal thickness (μm) | 0.805 (<0.001) | 0.256 | |
| Area of fibrous connective tissue (µm2) | 0.518 (0.014) | 0.169 | |
| Area of sweat glands (µm2) | −0.143 (0.515) | – | – |
| Skin of periumbilical abdominal area | |||
| Epidermal thickness (μm) | 0.806 (<0.001) | 0.559 | 0.99 (p<0.001) |
| Dermal thickness (μm) | 0.579 (0.038) | −0.216 | |
| Area of fibrous connective tissue (µm2) | 0.538 (0.071) | – | – |
| Area of sweat glands (µm2) | 0.441 (0.131) | – | – |
| Area of sebaceous glands (µm2) | –0.845 (0.001) | −0.646 | |
| Skin over sole | |||
| Epidermal thickness (μm) | 0.712 (<0.001) | 0.540 | 0.83 (p<0.001) |
| Dermal thickness (μm) | 0.660 (<0.001) | 0.456 | |
| Area of fibrous connective tissue (µm2) | −0.266 (0.189) | – | – |
| Area of sweat glands (µm2) | –0.266 (0.189) | – | – |
R-square of multivariate models: 0.87 (palm), 0.97 (abdomen), 0.69 (sole). Durbin-Watson analysis: 1.94 (palm), 1.90 (abdomen), 1.45 (sole).