Boxplot comparisons of TDI olfactory scores between control subjects and case subjects with both CRSwNP and CRSsNP. TDI, Threshold, Discrimination, and Identification. CRS, chronic rhinosinusitis; CRSwNP, chronic rhinosinusitis with nasal polyposis; CRSsNP, chronic rhinosinusitis without nasal polyposis. Subjects with CRSwNP had significantly lower TDI total scores and T,D, and I component scores compared to controls (all p<0.001) on average. Subjects with CRSsNP were found to only have significantly lower T component scores compared to controls subjects (4.9 [±3.2] vs. 6.1 [±2.7]; p=0.003).