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Table 4 The weighted prevalence of FOG in Parkinson’s disease patients and the heterogeneities

From: The prevalence of freezing of gait in Parkinson’s disease and in patients with different disease durations and severities

Prevalence of FOGNumber of studiesTotal no. PD patientsRange of the prevalence of FOG, %Mean prevalence of FOG (95% CI) ,%Heterogeneity, % (P value)
In general PD patients22536114.0-56.839.9 (35.3-44.5)91.5% (< 0.001)
 According to FOG-Q item 313255922.4-56.843.8 (38.5-49.1)85.9% (< 0.001)
 According to UPDRS item 143182027.2-41.536.0 (29.0-43.1)89.1% (< 0.001)
 According to other criteria698214.0-49.434.1 (22.8-45.4)93.3% (< 0.001)
In PD patients with objectively or subjectively diagnostic criteria     
 Objectively19488714.0-56.840.2(35.1-45.2)92.2% (< 0.001)
 Subjectively347426.5-49.438.4(25.2-51.6)88.8% (< 0.001)
In PD patients with different disease durations     
 < 5 years611394.4-36.122.4 (12.8-31.9)93.9% (< 0.001)
 ≥ 5 years7124634.8-65.853.3 (45.8-60.8)84.1% (< 0.001)
 ≥ 10 years670959.1-86.570.8 (60.8-80.9)88.2% (< 0.001)
In PD patients with different H&Y stagings     
 ≤ 2.5722297.1-37.028.4 (15.7-41.1)97.9% (< 0.001)
 > 2.5782960.0-82.968.4 (58.7-78.2)88.4% (< 0.001)
  1. FOG-Q freezing of gait questionnaire, UPDRS unified Parkinson’s disease rating scale, FOG freezing of gait, PD Parkinson’s disease, H&Y Hoehn and Yahr staging