Figure 1. Mean plasma levels of 25-hydroxy vitamin D3 (25-VD3).
25-VD3 as measured by ELISA from plasma collected at time of endoscopic sinus surgery. Each symbol represents the results of individual patients with values below the dashed line being 25-VD3 deficient. Statistics shown are results of post hoc Dunn’s multiple comparison test between indicated groups; *p<0.01. CRSsNP, chronic rhinosinusitis without nasal polyposis; CRSwNP, chronic rhinosinusitis without nasal polyposis; ng, nanogram; ml, milliliter.