Table 1 Patient characteristics
Laminectomy 1 level (n = 223) | Laminectomy multilevel (n = 111) | Discectomy (n = 84) | |||||||
|---|---|---|---|---|---|---|---|---|---|
ESB yes (n = 73) | ESB no (n-150) | p- value | ESB yes (n = 31) | ESB no (n = 80) | p-value | ESB yes (n = 22) | ESB no (n = 62) | p-value | |
Male sex, n (%) | 37 (51) | 82 (55) | .668 | 20 (65) | 39 (49) | .145 | 9 (41) | 25 (40) | 1.000 |
Mean age (IQR) in years | 57 (37–77) | 62 (43–81) | .009 | 69 (55–83) | 68 (56–80) | .860 | 44 (23–65) | 43 (28–58) | .657 |
ASA 1, n (%) | 7 (8) | 11 (8) | .581 | 2 (3) | .082 | 6 (29) | 19 (31) | .282 | |
ASA 2, n (%) | 48 (68) | 93 (63) | 12 (39) | 46 (58) | 14 (68) | 37 (61) | |||
ASA 3, n (%) | 16 (23) | 41 (28) | 18 (58) | 31 (40) | 1 (5) | 5 (8) | |||
ASA 4, n (%) | 2 (1) | 1 (3) | |||||||
Mean length of surgery ± SD in hrs | 71 ± 10 | 63 ± 12 | < .001 | 87 ± 16 | 85 ± 19 | .569 | 71 ± 12 | 62 ± 11 | .003 |