Table 1.
Baseline hernia characteristics in each mesh group
| Type of mesh | Total group | Reoperation group | ||||
|---|---|---|---|---|---|---|
| HWM | LWM | Total | HWM | LWM | Total | |
| No. of hernias | 7449 (53.8) | 6390 (46.2) | 13,839 | 235 (47.9) | 256 (52.1) | 491 |
| Age, yearsa (range) | 59.4 (15.4–93.8) | 58.8 (15.0–94.5) | 59.2 (15.0–94.5) | 62.3 (19.4–86.9) | 61.0 (15.3–89.2) | 61.3 (15.3–89.2) |
| ASA class | ||||||
| I–II | 7062 (94.8) | 6006 (94.0) | 13,068 (94.4) | 224 (95.3) | 235 (91.8) | 459 (93.5) |
| III–IV | 365 (4.9) | 382 (6.0) | 747 (5.4) | 11 (4.7) | 21 (8.2) | 32 (6.5) |
| NA | 22 (0.3) | 2 (0.0) | 24 (0.2) | 0 | 0 | 0 |
| Sex | ||||||
| Male | 6903 (92.7) | 5245 (82.1) | 12,148 (87.8) | 232 (98.7) | 235 (91.8) | 467 (95.1) |
| Female | 546 (7.3) | 1145 (18.0) | 1691 (12.2) | 3 (1.3) | 21 (8.2) | 24 (5.1) |
| Type of hernia | ||||||
| Bilateral | 4877 (65.5) | 3488 (54.6) | 8365 (60.4) | 161 (68.5) | 140 (54.7) | 301 (61.3) |
| Unilateral | 2572 (34.5) | 2902 (45.4) | 5474 (39.6) | 74 (31.5) | 116 (45.3) | 190 (38.7) |
| Recurrent hernia | ||||||
| No | 5867 (78.8) | 5227 (81.8) | 11,094 (80.2) | 184 (78.3) | 204 (79.7) | 388 (79.0) |
| Yes | 1582 (21.2) | 1163 (18.2) | 2745 (19.7) | 51 (21.7) | 52 (20.3) | 103 (21.0) |
| Type of defect | ||||||
| Indirect | 3047 (41.0) | 3218 (50.4) | 6265 (45.3) | 96 (40.9) | 115 (44.9) | 211 (43.0) |
| Direct | 3532 (47.4) | 3314 (51.9) | 6846 (49.5) | 113 (48.1) | 105 (41.0) | 218 (44.4) |
| Femoral | 199 (2.7) | 319 (5.0) | 518 (3.7) | 4 (1.7) | 10 (3.9) | 14 (2.9) |
| Combined/others | 634 (8.9) | 565 (8.8) | 1199 (8.7) | 22 (9.3) | 23 (9.0) | 45 (9.2) |
| NA | 37 (0.5) | 110 (1.7) | 147 (1.1) | 0 | 3 (1.2) | 3 (0.6) |
| Size of defect | ||||||
| < 1.5 cm | 1174 (16.0) | 1520 (23.8) | 2694 (19.5) | 33 (14.0) | 49 (19.1) | 82 (16.7) |
| 1.5–3 cm | 4126 (55.3) | 3880 (60.7) | 8006 (57.9) | 123 (52.3) | 155 (60.5) | 278 (56.6) |
| > 3 cm | 1764 (23.7) | 984 (15.4) | 2748 (19.9) | 67 (28.5) | 52 (20.3) | 119 (24.2) |
| NA | 385 (5.2) | 6 (0.0) | 391 (2.8) | 12 (5.1) | 0 | 12 (2.4) |
| Mesh fixation | ||||||
| Yes | 4236 (56.9) | 4434 (69.3) | 8670 (62.6) | 152 (64.7) | 169 (66.0) | 321 (65.4) |
| No | 3213 (43.1) | 1956 (30.6) | 5169 (37.4) | 83 (35.3) | 87 (34.0) | 170 (34.6) |
Values in parentheses are in percentage unless indicated otherwise
NA unknown/missing, HWM heavyweight meshes, LWM lightweight meshes, ASA class American Society of Anesthesiologists classification
aAge are given in median with range