Figure 4.

Predictors of olfactory performance in PD. (a) Better sniffing predicted better olfactory performance in PD. (b) Motor performance as assessed by finger tapping did not significantly predict olfactory performance in PD. (c) Motor performance as assessed by a standard test (UPDRS part III) did not significantly predict olfactory performance in PD. (d) A subset of the UPDRS part III, representing only axial function, significantly predicted olfactory performance in PD (note that one subject had a significantly outlying UPDRS score and is therefore not depicted in the scattergram. Graph c remained insignificant, and d remained significant, with or without this subject).