Table 1.

Criteria for eligibility, per arm of the systematic review

Epidemiological studies	Intervention studies
Inclusion criteria	Inclusion criteria
Includes human participants diagnosed with idiopathic PD;	Includes human participants diagnosed with idiopathic PD and FOG;
Includes both male and female participants;	Includes ≥ 10 participants with FOG in the final analysis;
Includes ≥ 100 participants with FOG in the final analysis;	Reports sex distribution of study participants;
Reports prevalence of FOG within the cohort;	Published between June 2014 – December 2019;
Reports sex distribution within the cohort and within FOG subgroup;	Published in English or Dutch
Observational cohort studies (retrospective or prospective) and cross-sectional studies;
Ambulatory, outpatient or community-based settings only;
Published in English or Dutch

Exclusion criteria	Exclusion criteria
Studies that enroll participants who are receiving a particular intervention;	Inpatient or acute care settings;
Inpatient or other acute care settings;	Interventions specifically targeted to either men, or women (e.g. hormonal therapy in women);
Other studies that cannot be expected to provide generalizable estimates of prevalence	Interventions specifically targeted to a specific subgroup of PD patients with FOG (e.g. DBS populations)

PD Parkinson’s disease, FOG freezing of gait, DBS deep brain stimulation