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Table 2 operative variables of the studied groups

From: Posterior and postero-lateral incidental durotomy during lumbar spine surgery: primary repair versus augmented primary repair

  Primary repair Group (A) Augmented repair Group (B) χ2 P
N = 34 N = 34
No of operated levels
Mean ± SD 2.32 ± 0.88 1.97 ± 1.14 Z (-1.633) 0.102
Extent of dural tear
0–2 cm 14 (41.7%) 28 (82.3%)   
 > 2 cm 20 (58.3%) 6 (17.7%) 12.205  < 0.001**
Post-op immobilization
Mean ± SD 1.469 ± 0.57 1.5 ± 0.3 t (-0.281) 0.78
  1. *T independent sample t-test p < 0.05 is statistically significant