From: Zygapophysial joint blocks in chronic low back pain: a test of Revel's model as a screening test
All patients (n = 151) | Excluded patients (n = 35) | Included patients (n = 116) | Significance | |||||||
---|---|---|---|---|---|---|---|---|---|---|
Variable | Mean | Median | STD | Mean | Median | STD | Mean | Median | STD | p value |
Age (years) | 44.3 | 43.0 | 13.2 | 48.03 | 48.0 | 14.3 | 43.2 | 41.5 | 12.6 | 0.09 |
Duration of current symptoms (weeks) | 147.1 | 91.0 | 170.2 | 103.7 | 74.0 | 93.5 | 160.2 | 104.0 | 186.2 | 0.08 |
Time off work (weeks) | 89.5 (n = 69) | 74.0 | 82.4 | 55.4 (n = 15) | 56.0 | 41.3 | 99.0 (n = 54) | 82.0 | 88.6 | 0.04* |
VAS (today) | 55.9 | 61.0 | 24.6 | 50.8 | 53.0 | 27.0 | 57.4 | 62.0 | 23.7 | 0.24 |
VAS (at best) | 30.3 | 27.0 | 22.5 | 24.6 | 15.0 | 22.5 | 32.0 | 30.5 | 22.3 | 0.06 |
VAS (at worst) | 85.8 | 89.0 | 13.3 | 80.6 | 87.0 | 18.4 | 87.4 | 90.0 | 10.9 | 0.07 |
Roland Morris Questionnaire | 17.8 | 19.0 | 4.8 | 18.0 | 19.0 | 4.6 | 17.7 | 19.0 | 4.8 | 0.68 |
Zung Depression Index | 29.7 | 29.0 | 11.6 | 26.1 | 26.0 | 11.8 | 30.7 | 30.0 | 11.4 | 0.06 |
MSPQ Questionnaire | 9.7 | 9.0 | 6.8 | 8.8 | 8.0 | 6.4 | 9.9 | 9.0 | 7.0 | 0.49 |
% Male | 53.0 | 47.1 | 54.7 | 0.55 | ||||||
% Smoker | 34.4 | 35.3 | 34.2 | 0.98 | ||||||
% Off work | 50.0 | 44.1 | 51.7 | 0.33 | ||||||
% Previous spinal surgery | 28.8 | 17.7 | 28.2 | 0.14 | ||||||
% traumatic onset | 69.5 | 73.5 | 68.4 | 0.78 |