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Mean serum vitamin D before and one month after surgery (ng/mL) in patients suffering for chronic sinusitis with nasal polyps (CRSwNP) and those without nasal polyps (CRSsNP).
| Groups of Patients with CRS | Mean Serum Vitamin D before Surgery (ng/mL) | Mean Serum Vitamin D after Surgery (ng/mL) |
|---|---|---|
| CRSwNP | 20.36 | 24.95 |
| CRSsNP | 27.68 | 31.05 |
