- Comparison between MRI lumbar facet joints synovitis grading before and after the intervention in Group I receiving platelet-rich plasma at each lumbar level.
| MRI | Before | After | Test value* | P-value | Sig. | ||
|---|---|---|---|---|---|---|---|
| n | % | n | % | ||||
| L1-2 (n=5 [16.7%]) | |||||||
| Grade L1-2 | |||||||
| Grade 0 | 0 | 0.0 | 4 | 80.0 | 6.800 | 0.033 | S |
| Grade I | 4 | 80.0 | 1 | 20.0 | |||
| Grade II | 1 | 20.0 | 0 | 0.0 | |||
| L2-3 (n= 7 [76.7%]) | |||||||
| Grade L2-3 | |||||||
| Grade 0 | 0 | 0.0 | 6 | 85.7 | 10.571 | 0.005 | HS |
| Grade I | 6 | 85.7 | 1 | 14.3 | |||
| Grade II | 1 | 14.3 | 0 | 0.0 | |||
| Grade III | 0 | 0.0 | 0 | 0.0 | |||
| L3-4 (n=9 [70.0%]) | |||||||
| Grade L3-4 | |||||||
| Grade 0 | 0 | 0.0 | 7 | 77.8 | 11.455 | 0. 001 | HS |
| Grade I | 9 | 100.0 | 2 | 22.2 | |||
| Grade II | 0 | 0.0 | 0 | 0.0 | |||
| Grade III | 0 | 0.0 | 0 | 0.0 | |||
| L4-5 (n=11 [63.3%]) | |||||||
| Grade L4-5 | |||||||
| Grade 0 | 0 | 0.0 | 7 | 63.6 | 11.600 | 0.009 | HS |
| Grade I | 8 | 72.7 | 2 | 18.2 | |||
| Grade II | 2 | 18.2 | 2 | 18.2 | |||
| Grade III | 1 | 9.1 | 0 | 0.0 | |||
| L5-S1 (n=13 [56.7%]) | |||||||
| Grade L5–S1 | |||||||
| Grade 0 | 0 | 0.0 | 6 | 46.2 | 8.000 | 0.018 | S |
| Grade I | 10 | 76.9 | 6 | 46.2 | |||
| Grade II | 3 | 23.1 | 1 | 7.7 | |||
| Grade III | 0 | 0.0 | 0 | 0.0 | |||
p>0.05: not significant (NS), p<0.05: significant (S), p<0.01: highly significant (HS), *:Chi-square test, MRI: magnetic resonance imaging