Table 3 Tamponade use for the primary RD surgery failure risk factor model covariates.
Covariate | SF6 gas | C2F6 gas | C3F8 gas | Air | Light oil | Heavy oil | Overall |
|---|---|---|---|---|---|---|---|
Number of operations | 2524 | 1711 | 681 | 47 | 447 | 98 | 5508 |
Patient age (years) | |||||||
45 to 64 | 1399 (55.4) | 910 (53.2) | 328 (48.2) | 18 (38.3) | 182 (40.7) | 36 (36.7) | 2873 (52.2) |
65 to 79 | 886 (35.1) | 582 (34.0) | 249 (36.6) | 12 (25.5) | 165 (36.9) | 45 (45.9) | 1939 (35.2) |
≥80 | 114 (4.5) | 107 (6.3) | 53 (7.8) | 2 (4.3) | 50 (11.2) | 10 (10.2) | 336 (6.1) |
<45 | 125 (5.0) | 112 (6.5) | 51 (7.5) | 15 (31.9) | 50 (11.2) | 7 (7.1) | 360 (6.5) |
Location of largest break | |||||||
9–3 O’clock | 2306 (91.4) | 1110 (64.9) | 266 (39.1) | 29 (61.7) | 253 (56.6) | 21 (21.4) | 3985 (72.3) |
4 or 8 O’clock | 128 (5.1) | 257 (15.0) | 119 (17.5) | 8 (17.0) | 54 (12.1) | 11 (11.2) | 577 (10.5) |
5–7 O’clock | 88 (3.5) | 338 (19.8) | 290 (42.6) | 10 (21.3) | 137 (30.6) | 66 (67.3) | 929 (16.9) |
No break found | 2 (<0.1) | 6 (0.4) | 6 (0.9) | 0 (0.0) | 3 (0.7) | 0 (0.0) | 17 (0.3) |
Inferior clock hours detached | |||||||
<3 h | 1961 (77.7) | 979 (57.2) | 207 (30.4) | 28 (59.6) | 99 (22.1) | 7 (7.1) | 3281 (59.6) |
3–5 h | 357 (14.1) | 492 (28.8) | 266 (39.1) | 16 (34.0) | 112 (25.1) | 49 (50.0) | 1292 (23.5) |
6 h | 206 (8.2) | 240 (14.0) | 208 (30.5) | 3 (6.4) | 236 (52.8) | 42 (42.9) | 935 (17.0) |
Total RD | |||||||
No | 2463 (97.6) | 1630 (95.3) | 594 (87.2) | 47 (100.0) | 297 (66.4) | 91 (92.9) | 5122 (93.0) |
Yes | 61 (2.4) | 81 (4.7) | 87 (12.8) | 0 (0.0) | 150 (33.6) | 7 (7.1) | 386 (7.0) |
PVR grade | |||||||
None, A or B | 2483 (98.4) | 1600 (93.5) | 597 (87.7) | 44 (93.6) | 274 (61.3) | 60 (61.2) | 5058 (91.8) |
C | 41 (1.6) | 111 (6.5) | 84 (12.3) | 3 (6.4) | 173 (38.7) | 38 (38.8) | 450 (8.2) |
Cryotherapy used during surgery | |||||||
No | 372 (14.7) | 315 (18.4) | 89 (13.1) | 2 (4.3) | 160 (35.8) | 39 (39.8) | 977 (17.7) |
Yes | 2152 (85.3) | 1396 (81.6) | 592 (86.9) | 45 (95.7) | 287 (64.2) | 59 (60.2) | 4531 (82.3) |
Vitrectomy gauge used | |||||||
20 g | 97 (3.8) | 30 (1.8) | 23 (3.4) | 0 (0.0) | 32 (7.2) | 10 (10.2) | 192 (3.5) |
23 g | 1298 (51.4) | 1161 (67.9) | 476 (69.9) | 8 (17.0) | 323 (72.3) | 58 (59.2) | 3324 (60.3) |
25 g | 1072 (42.5) | 452 (26.4) | 160 (23.5) | 5 (10.6) | 83 (18.6) | 27 (27.6) | 1799 (32.7) |
27 g | 27 (1.1) | 49 (2.9) | 3 (0.4) | 1 (2.1) | 5 (1.1) | 3 (3.1) | 88 (1.6) |
Not recorded | 30 (1.2) | 19 (1.1) | 19 (2.8) | 33 (70.2) | 4 (0.9) | 0 (0.0) | 105 (1.9) |
