Table 3.

Enablers and factors that may suggest the term complex phase PD is a better term to use to denote advanced Parkinson’s disease (PD)

Patient preference

Complexity of mechanisms that lead to the clinical expression of motor and nonmotor subtypes of PD

The need for multimodal and not single biomarkers

The need to take into account various strands of personalised medicine

The fact that advanced PD implies duration of disease while complex refers to the conditional stage and incorporates the concept that early PD can also be complex