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Table 4 Relation between pre, postoperative variables and the need for revision surgery among studied groups:

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

  Revision surgery χ2 P
No (n = 62) Yes (n = 6)
Gender     
Female 21 (33.9%) 4 (66.7%)   
Male 41 (66.1%) 2 (33.3%) Fisher 0.183
Age     
Mean ± SD 48.98 ± 8.55 43.67 ± 9.87 t (1.437) 0.155
BMI     
Mean ± SD 27.36 ± 2.54 25.67 ± 2.84 t (1.546) 0.127
Co morbidity     
NAD 26 (41.9%) 2 (33.3%)   
Smoker 19 (30.7%) 0 (0%)   
Diabetes 17 (27.4%) 4 (66.7%) 4.666 0.097
ASA:     
Mean ± SD 2.39 ± 0.51 2.67 ± 1.03 t (−0.648) 0.544
Previous surgery     
No 42 (67.7%) 6 (100%)   
Yes 20 (32.3%) 0 (0%) Fisher 0.169
No of operated levels     
Mean ± SD 2.23 ± 1.03 1.33 ± 0.52 t (3.592) 0.005*
Extent of dural tear     
0–2 cm 36 (58.1%) 6 (100%)   
 > 2 cm 26 (41.9%) 0 (0%) Fisher 0.075
Post-op immobilization     
Mean ± SD 1.51 ± 0.47 1.33 ± 0.26 0.901 0.371
Clinical outcome     
Better 62 (100%) 0 (0%)   
Worse 0 (0%) 6 (100%) Fisher  < 0.001*
Length of hospital stay (days)     
Mean ± SD 6.53 ± 1.28 31.67 ± 1.03 −46.66  < 0.001**
Days of drains     
Mean ± SD 4.32 ± 0.65 6.33 ± 1.03 −4.681 0.004*
Days of bed rest     
Mean ± SD 4.48 ± 0.87 8.33 ± 1.16 −10.309  < 0.001**
Complications     
No 56 (90.3%) 6 (100%)   
CSF leakage 6 (9.7%) 0 (0%) Fisher  > 0.999
  1. **P ≤ 0.001 is statistically highly significant