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Table 3: 
Positive predictive values between nerve root changes and clinical symptoms in postoperative epidural fibrosis
Nerve Root ChangesPositive Predictive Value (%)P value
Enhancement69.0.069
Thickening67.4.231
Displacement63.0.726
Combination of all92.9.008*
  • * Value is statistically significant using the χ2 test (P < .05).