Table 1 Patient characteristics based on timing of plain transversus abdominis plane (TAP) block
Variables | Overall (N = 262) | Preoperative TAP (n = 240) | Postoperative TAP (n = 22) | P-value |
|---|---|---|---|---|
Age, years, mean (SD) | 57.76 (16.10) | 57.83 (15.87) | 56.95 (18.90) | 0.807 |
Male, no. (%) | 118 (45.0) | 107 (44.6) | 11 (50.0) | 0.791 |
Body mass index, kg/m2, mean (SD) | 28.38 (7.32) | 28.51 (7.48) | 27.03 (5.27) | 0.366 |
Diabetes mellitus, no. (%) | 67 (25.6) | 64 (26.7) | 3 (13.6) | 0.278 |
Hyperlipidemia, no. (%) | 156 (59.5) | 144 (60.0) | 12 (54.5) | 0.786 |
Cigarette smoking, no. (%) | 85 (32.4) | 80 (33.3) | 5 (22.7) | 0.436 |
History of COPD, no. (%) | 21 (8.0) | 19 (7.9) | 2 (9.1) | 0.692 |
Alcohol use, no. (%) | 126 (48.1) | 113 (47.1) | 13 (59.1) | 0.392 |
Hypertension, no. (%) | 132 (50.4) | 121 (50.4) | 11 (50.0) | 0.99 |
History of CHF, no. (%) | 22 (8.4) | 21 (8.8) | 1 (4.5) | 0.705 |
Current opioid use, no. (%) | 43 (16.5) | 41 (17.2) | 2 (9.1) | 0.499 |
Steroid use, no. (%) | 37 (14.1) | 31 (12.9) | 6 (27.3) | 0.126 |
Previous abdominal surgery, no. (%) | 170 (64.9) | 157 (65.4) | 13 (59.1) | 0.718 |
Blood thinner use, no. (%) | ||||
Aspirin | 52 (19.8) | 47 (19.6) | 5 (22.7) | 0.941 |
Warfarin | 7 (2.7) | 6 (2.5) | 1 (4.5) | 0.463 |
Plavix | 11 (4.2) | 11 (4.6) | 0 (0.0) | 0.607 |
Others | 25 (9.5) | 22 (9.2) | 3 (13.6) | 0.451 |
ASA class, no. (%) | 0.241 | |||
ASA class 1 | 1 (0.4) | 1 (0.4) | 0 (0.0) | |
ASA class 2 | 85 (32.4) | 78 (32.5) | 7 (31.8) | |
ASA class 3 | 169 (64.5) | 156 (65.0) | 13 (59.1) | |
ASA class 4 | 7 (2.7) | 5 (2.1) | 2 (9.1) | |
ASA > 2 | 176 (67.2) | 161 (67.1) | 15 (68.2) | 0.99 |
Surgical indication, no. (%) | ||||
Malignancy | 129 (49.2) | 119 (49.6) | 10 (45.5) | 0.882 |
IBD | 52 (19.8) | 46 (19.2) | 6 (27.3) | 0.401 |
Benign disease | 128 (48.9) | 116 (48.3) | 12 (54.5) | 0.738 |