Interpretation of scores
Total pain score: / 50 x 100 = %
(Note: If a person does not answer all questions divide by the total possible score, eg. if 1 question missed divide by 40)
Total disability score: / 80 x 100 = %
(Note: If a person does not answer all questions divide by the total possible score, eg. if 1 question missed divide by 70)
Total Spadi score: / 130 x 100 = %
(Note: If a person does not answer all questions divide by the total possible score, eg. if 1 question missed divide by 120)
The means of the two subscales are averaged to produce a total score ranging from 0 (best) to 100 (worst).
Minimum Detectable Change (90% confidence) = 13 points
(Change less than this may be attributable to measurement error)