Table 1.

Summarizes the main PD clinical and demographic features associated with smell and taste impairment.

Factors associated with sense impairment in PD	Sense
	Smell	Taste
Gender	Male	Male
Age	Older age	Older Age
Disease fenotype	Rigid-Akinetic type, PIGD type	No difference
Associated features	Cognitive impairmentgayu Higher H&Y stage	Cognitive impairment
Appearance at the stage of illness	Early/Prodromic	Intermediate/Late
Smoking habits	Non smokers	Not investigated
Prevalence	75–90%	≈10%
Treatment	Olfactory training	No specific treatment