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. 2023 Jul 29;12(15):5007. doi: 10.3390/jcm12155007

Figure 1.

Figure 1

Summary of the test results in cases with PVOD (post-viral olfactory dysfunction), CRS with polyps (chronic rhinosinusitis with polyps), CRS without polyps (chronic rhinosinusitis without polyps), and PTOD (post-traumatic olfactory dysfunction). Based on the results of the two olfactory functional tests (T&T and IVO tests), responses were classified into four types: T&T(+) IVO(+), reaction to both T&T and IVO odors; T&T(−) IVO(−), no reaction to either T&T or IVO odors; T&T(+) IVO(−), reaction only to T&T odors; T&T(−) IVO(+), reaction only to the IVO odor.