Functional ability: 31 items
Additional questions: 5 items (32 to 36)
Responses for items 1 to 31:
(1) Do you have difficulty or disability in performing the task?
(2) If no difficulty, then do you need to modify the way you perform the task?
(3) If no difficulty, then have you experienced a loss of efficiency when performing the task?
(4) not applicable
|
Response for items 1 to 31
|
Score
|
|
normal (no disability, no need to modify activity, no loss of efficiency)
|
0
|
|
no disability but need to modify
|
1
|
|
no disability but loss of efficiency
|
1
|
|
unable to perform at all (disabled)
|
2
|
|
Response for items 32 to 36
|
Score
|
|
never or not a problem
|
0
|
|
occasional
|
1
|
|
can control
|
1
|
|
always or uncontrollable
|
2
|
total score =
= SUM(points for applicable items)
percent disability =
= (total score) / (2 * (number of applicable items)) * 100%
Interpretation:
• minimum total score: 0
• maximum total score: 72
• The higher the score the greater the degree of disability.
Performance:
• The questionnaire is valid based on performance relative to quantitative computerized tremor analysis.
• The test shows test-retest reliability when used on separate occasions.
• The disability measurement was independent of depression, anxiety or general disability.
