Table 1.
Clinical and Surgical Characteristics of the Study Population
| Variables | Type A | Type B | ||||||
|---|---|---|---|---|---|---|---|---|
|
Total (n=3423) |
Age ≥80 y (n=206) |
Age <80 y (n=3217) |
P Value |
Total (n=575) |
Age ≥80 y (n=79) |
Age <80 y (n=496) |
P Value | |
| Characteristic | ||||||||
| Age, y | 59.1±13.6 | 83.7±2.7 | 57.5±12.5 | 62.4±15.6 | 84.5±3.7 | 58.9±13.7 | ||
| Male | 2351 (68.7) | 89 (43.2) | 2262 (70.3) | <0.001 | 470 (81.7) | 61 (77.2) | 409 (82.5) | 0.262 |
| Comorbidity | ||||||||
| Marfan syndrome | 84 (2.5) | 0 (0.0) | 84 (2.6) | 0.019 | 7 (1.2) | 0 (0.0) | 7 (1.4) | 0.288 |
| Hypertension | 2355 (68.8) | 141 (68.4) | 2214 (68.8) | 0.910 | 426 (74.1) | 63 (79.7) | 363 (73.2) | 0.216 |
| Diabetes mellitus | 364 (10.6) | 39 (18.9) | 325 (10.1) | <0.001 | 74 (12.9) | 8 (10.1) | 66 (13.3) | 0.433 |
| Heart failure | 162 (4.7) | 33 (16.0) | 129 (4.0) | <0.001 | 33 (5.7) | 4 (5.1) | 29 (5.8) | 0.781 |
| Old myocardial infarction | 71 (2.1) | 2 (1.0) | 69 (2.1) | 0.252 | 27 (4.7) | 6 (7.6) | 21 (4.2) | 0.190 |
| Peripheral arterial disease | 123 (3.6) | 7 (3.4) | 116 (3.6) | 0.877 | 45 (7.8) | 9 (11.4) | 36 (7.3) | 0.204 |
| Atrial fibrillation | 204 (6.0) | 31 (15.0) | 173 (5.4) | <0.001 | 13 (2.3) | 3 (3.8) | 10 (2.0) | 0.323 |
| Old stroke | 270 (7.9) | 30 (14.6) | 240 (7.5) | <0.001 | 70 (12.2) | 8 (10.1) | 62 (12.5) | 0.549 |
| Chronic kidney disease | 179 (5.2) | 13 (6.3) | 166 (5.2) | 0.472 | 49 (8.5) | 7 (8.9) | 42 (8.5) | 0.907 |
| Liver cirrhosis | 38 (1.1) | 3 (1.5) | 35 (1.1) | 0.625 | 11 (1.9) | 2 (2.5) | 9 (1.8) | 0.666 |
| Coagulopathy | 74 (2.2) | 6 (2.9) | 68 (2.1) | 0.445 | 13 (2.3) | 1 (1.3) | 12 (2.4) | 0.522 |
| COPD | 133 (3.9) | 21 (10.2) | 112 (3.5) | <0.001 | 41 (7.1) | 10 (12.7) | 31 (6.3) | 0.040 |
| Previous cardiac surgery | 52 (1.5) | 4 (1.9) | 48 (1.5) | 0.609 | 18 (3.1) | 1 (1.3) | 17 (3.4) | 0.306 |
| CCI score | 2.1±1.5 | 2.7±1.8 | 2.0±1.5 | <0.001 | 2.3±1.8 | 2.6±1.8 | 2.3±1.8 | 0.139 |
| Hospital volume of aortic dissection surgery | 0.571 | 0.006 | ||||||
| First quartile (1–94) | 845 (24.7) | 51 (24.8) | 794 (24.7) | 120 (20.9) | 15 (19.0) | 105 (21.2) | ||
| Second quartile (109–206) | 893 (26.1) | 52 (25.2) | 841 (26.1) | 104 (18.1) | 12 (15.2) | 92 (18.5) | ||
| Third quartile (207–334) | 904 (26.4) | 62 (30.1) | 842 (26.2) | 125 (21.7) | 8 (10.1) | 117 (23.6) | ||
| Fourth quartile (336–665) | 781 (22.8) | 41 (19.9) | 740 (23.0) | 226 (39.3) | 44 (55.7) | 182 (36.7) | ||
| Surgery year | 0.151 | 0.366 | ||||||
| 2005–2007 | 892 (26.1) | 42 (20.4) | 850 (26.4) | 122 (21.2) | 12 (15.2) | 110 (22.2) | ||
| 2008–2010 | 1143 (33.4) | 72 (35.0) | 1071 (33.3) | 152 (26.4) | 22 (27.8) | 130 (26.2) | ||
| 2011–2013 | 1388 (40.5) | 92 (44.7) | 1296 (40.3) | 301 (52.3) | 45 (57.0) | 256 (51.6) | ||
| Type A dissection surgical detail | ||||||||
| Extension of aortic surgery | ||||||||
| Partial or total aortic arch replacement | 1012 (29.6) | 67 (32.5) | 945 (29.4) | 0.337 | … | … | … | … |
| Aortic root replacement (Bentall operation) | 360 (10.5) | 13 (6.3) | 347 (10.8) | 0.042 | … | … | … | … |
| Elephant trunk | 86 (2.5) | 1 (0.5) | 85 (2.6) | 0.055 | … | … | … | … |
| Ascending aorta replacement only | 2044 (59.7) | 130 (63.1) | 1914 (59.5) | 0.306 | … | … | … | … |
| Additional surgery | ||||||||
| CABG | 335 (9.8) | 20 (9.7) | 315 (9.8) | 0.969 | … | … | … | … |
| Valve replacement | 308 (9.0) | 23 (11.2) | 285 (8.9) | 0.262 | … | … | … | … |
| Type B surgery type | <0.001 | |||||||
| Open repair | … | … | … | … | 234 (40.7) | 16 (20.3) | 218 (44.0) | |
| Aortic stent | … | … | … | … | 341 (59.3) | 63 (79.7) | 278 (56.0) | |
| Follow‐up, y | 2.7±2.6 | 1.6±2.1 | 2.8±2.6 | <0.001 | 2.3±2.3 | 2.0±1.9 | 2.4±2.4 | 0.146 |
CABG indicates coronary artery bypass graft; CCI, Charlson comorbidity index; and COPD, chronic obstructive pulmonary disease.