Table 4: Premotor symptoms (adapted from [136]).

Strongest evidence:
 (i) Olfactory deficit
 (ii) Constipation
 (iii) Sleep disorders (EDS, RBD)
 (iv) Depression
Suggested links:
 (i) Other autonomic dysfunction (cardiac…)
 (ii) Anxiety
 (iii) Visual disturbances
 (iv) Cognitive changes
 (v) Restless legs syndrome
 (vi) Apathy
 (vii) Fatigue
 (viii) Personality traits