Demographic and parkinsonian clinical data and comparisons between groups.

Data are presented as mean, standard deviation, number and percentage. HADS: Hospital Anxiety and Depression scale; IPD: Idiopathic Parkinson Disease; LRRK2-PD: LRRK2 Parkinson Disease; MoCA: Montreal Cognitive Assessment; NA: Not applicable; NMC: Non-manifesting carriers; NMNC: Non-manifesting non-carriers; PDQ-39: 39-item Parkinson Disease Questionnaire; PIGD: postural instability gait difficulty; PD: Parkinson disease; UPDRS: Unified Parkinson Disease Rating Scale. Demographic and parkinsonian clinical data and comparisons between groups.