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Relationship between serum zinc levels and disease duration and SDASI.
| Serum zinc levels | ||
| Disase duration (months) | r | 0.070c |
| P | 0.658 | |
| SDASI | r | -0.171d |
| P | 0.273 | |
cr = Spearman rank correlation, dr = Pearson rank correlation. SDASI: Seborrheic Dermatitis Area and Severity Index.
