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Table 3 Correlations with FOGQsa and descriptive values for clinical tests

From: Development and testing of a self administered version of the Freezing of Gait Questionnaire

  Total sample n = 225 Clinical sample n = 36 Postal survey n = 189
  rs p-value rs p-value rs p-value
Age, years 0.14 0.046 0.07 >0.3 0.21 0.006
PD-duration, years 0.42 <0.001 0.50 0.002 0.40 <0.001
Falls-Efficacy Scale -0.74 <0.001 -0.57 0.001 -0.78 <0.001
Physical Functioning (PF, SF-36) -0.61 <0.001 -0.50 0.006 -0.68 <0.001
Item 13, UPDRS II (Falling) 0.49 <0.001 0.53 0.001 0.49 <0.001
Item 14, UPDRS II (Freezing) 0.76 <0.001 0.72 <0.001 0.78 <0.001
Item 15, UPDRS II (Walking) 0.57 <0.001 0.56 0.001 0.64 <0.001
Clinical sample, n = 36 Median (q1-q3) rs p-value   
UPDRS I, Mentation, behavior and mood 2.0 (0-3.0) 0.33 0.059   
UPDRS II, Activities of Daily Living 7 (3.0-13.5) 0.68 <0.001   
UPDRS III, Motor examination 15.0 (8.0-20.0) 0.55 0.001   
Item 29, UPDRS III (Gait) 0.5 (0-1.0) 0.46 0.006   
Item 30, UPDRS III (Postural stability) 1.0 (0-2.0) 0.49 0.003   
Hoehn and Yahr ("on") 3.0 (2.0-3.0) 0.44 0.009   
Hoehn and Yahr ("off") 3.0 (3.0-4.0) 0.58 <0.001   
Dyskinesias (UPDRS IV, items 32-35) 2.5 (1.0-5.0) 0.63 <0.001   
Motor fluctuations (UPDRS IV, items 36-39) 3.0 (1.3-3.8) 0.60 <0.001   
Timed Up & Go, sec (Mean, SD) 9.7 (2.7) 0.34 0.049   
Comfortable gait speed, m/s (Mean, SD) 1.32 (0.23) -0.29 0.094   
Fast gait speed, m/s (Mean, SD) 1.60 (0.40) -0.33 0.055   
  1. Falls-Efficacy Scale, Swedish version; the total score can range between 0-130 (higher scores = better).
  2. Physical Functioning (PF, SF-36); total score can range between 0-100 (higher scores = better).
  3. Item 13, 14 and 15 of the UPDRS part II; each item graded from 0-4 (higher scores = greater severity).
  4. UPDRS part I; total score range 0-16 (16 = greater severity). UPDRS part II; total score range 0-52 (52 = greater severity). UPDRS part III; total score range 0-108 (108 = greater severity).
  5. Dyskinesias (UPDRS part IV, items 32-35); total score range 0-13 (13 = greater severity).
  6. Motor fluctuations (UPDRS part IV, items 36-39); total score range 0-7 (7 = greater severity).