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