For each section the total possible score is 5: if the first statement is marked the section score = 0; if the last statement is marked, it = 5.
If all 10 sections are completed the score is calculated as follows: Example: 16 (total scored) 50 (total possible score) x 100 = 32% If one section is missed or not applicable the score is calculated: 16 (total scored) 45 (total possible score) x 100 = 35.5%
Minimum detectable change (90% confidence): 10% points (change of less than this may be attributable to error in the measurement)
Interpretation of Scores
0% to 20%: minimal disability: The patient can cope with most living activities. Usually no treatment is indicated apart from advice on lifting sitting and exercise.
21%-40%: moderate disability: The patient experiences more pain and difficulty with sitting, lifting and standing. Travel and social life are more difficult and they may be disabled from work. Personal care, sexual activity and sleeping are not grossly affected and the patient can usually be managed by conservative means.
41%-60%: severe disability: Pain remains the main problem in this group but activities of daily living are affected. These patients require a detailed investigation.
61%-80%: crippled: Back pain impinges on all aspects of the patient's life. Positive intervention is required.
81%-100%: These patients are either bed-bound or exaggerating their symptoms.