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 sample n = 189 | |||
---|---|---|---|---|---|---|---|
Item | Â | Mean (SD) | Corrected Item-total correlationsn = 214 | Mean (SD) | Corrected Item-total correlationsn = 35 | Mean (SD) | Corrected Item-total correlationsn = 179 |
1 | "Walking during worst state" | 1.6 (1.1) 2 missing | 0.68 | 1.7 (1.2) 1 missing | 0.87 | 1.6 (1.1) 1 missing | 0.64 |
2 | "Gait difficulties affecting daily activities and independence" | 1.1 (1.1) 2 missing | 0.68 | 1.2 (1.1) 1 missing | 0.76 | 1.1 (1.2) 1 missing | 0.68 |
3 | "Feet getting glued to the floor" | 1.1 (1.4) 1 3 missing | 0.83 | 1.7 (1.4) | 0.82 | 1.0 (1.4) 2 missing | 0.84 |
4 | "Duration of longest freezing episode" | 0.87 (1.3) 7 missing | 0.89 | 1.6 (1.6) | 0.91 | 0.73 (1.1) 7 missing | 0.90 |
5 | "Duration of typical start hesitation" | 0.76 (1.1) 6 missing | 0.88 | 1.2 (1.4) | 0.85 | 0.67 (1.1) 6 missing | 0.89 |
6 | "Duration of typical turning hesitation" | 0.76 (1.1) 5 missing | 0.83 | 1.1 (1.4) | 0.78 | 0.68 (1.1) 5 missing | 0.85 |
 |  | Total score n = 214 | Total score n = 35 | Total score n = 179 | |||
 | Mean (SD) | 6.1 (6.2) |  | 8.6 (7.2) |  | 5.6 (5.9) |  |
 | Median, q1-q3 | 4.0, 1.0-4.0 |  | 8.0, 2.0-14.0 |  | 4.0, 1.0-9.0 |  |
 | Min-max | 0-22 |  | 0-22 |  | 0-22 |  |
 | % scoring minimum (0)/maximum (24) | 19/0 |  | 17/0 |  | 20/0 |  |
 | Reliability, Cronbach's alpha (95% CI) | 0.93 (0.91-0.94) | 0.94 (0.90-0.97) | 0.93 (0.91-0.94) |