Table 2.
Restricted mean survival time analysis of all-cause survival in patients with descending thoracic aortic aneurysm or intact descending thoracic aortic aneurysm treated with endovascular versus open repair
| Follow-up | RMST (95% CI), months | RMST difference (95% CI), months | P value | RMST ratio (95% CI), months | P value | |
|---|---|---|---|---|---|---|
| Endovascular | Open | |||||
| DTAA | ||||||
| 6 months | 5.516 (5.483 to 5.548) | 5.280 (5.251 to 5.309) | 0.236 (0.192 to 0.279) | <0.001 | 1.045 (1.036 to 1.053) | <0.001 |
| 1 year | 10.671 (10.595 to 10.747) | 10.307 (10.246 to 10.369) | 0.363 (0.265 to 0.462) | <0.001 | 1.035 (1.026 to 1.045) | <0.001 |
| 2 years | 20.335 (20.159 to 20.510) | 20.004 (19.871 to 20.137) | 0.331 (0.111 to 0.551) | 0.003 | 1.017(1.006 to 1.028) | 0.003 |
| 3 years | 29.145 (28.859 to 29.431) | 29.275 (29.068 to 29.483) | −0.131 (−0.484 to 0.223) | 0.469 | 0.996 (0.984 to 1.008) | 0.469 |
| 4 years | 37.132 (36.727 to 37.538) | 38.057 (37.770 to 38.344) | −0.925 (−1.422 to −0.428) | <0.001 | 0.976 (0.963 to 0.989) | <0.001 |
| 5 years | 44.422 (43.889 to 44.956) | 46.283 (45.913 to 46.654) | −1.861 (−2.511 to −1.212) | <0.001 | 0.960 (0.946 to 0.974) | <0.001 |
| 10 years | 70.190 (68.895 to 71.485) | 77.584 (76.503 to 78.664) | −7.394 (−9.080 to −5.707) | <0.001 | 0.905 (0.884 to 0.926) | <0.001 |
| Intact DTAA | ||||||
| 6 months | 5.574 (5.541 to 5.607) | 5.442 (5.415 to 5.468) | 0.133 (0.090 to 0.175) | <0.001 | 1.024 (1.016 to 1.032) | <0.001 |
| 1 year | 10.799 (10.720 to 10.877) | 10.656 (10.598 to 10.715) | 0.142 (0.044 to 0.241) | 0.005 | 1.013 (1.004 to 1.023) | 0.004 |
| 2 years | 20.604 (20.421 to 20.788) | 20.735 (20.607 to 20.863) | −0.130 (−0.354 to 0.093) | 0.253 | 0.994 (0.983 to 1.005) | 0.254 |
| 3 years | 29.531 (29.229 to 29.832) | 30.394 (30.191 to 30.597) | −0.863 (−1.227 to −0.500) | <0.001 | 0.972 (0.960 to 0.984) | <0.001 |
| 4 years | 37.616 (37.186 to 38.046) | 39.562 (39.279 to 39.845) | −1.946 (−2.461 to −1.431) | <0.001 | 0.951 (0.938 to 0.964) | <0.001 |
| 5 years | 44.959 (44.390 to 45.527) | 48.166 (47.797 to 48.535) | −3.207 (−3.885 to −2.529) | <0.001 | 0.933 (0.920 to 0.947) | <0.001 |
| 10 years | 70.415 (69.013 to 71.817) | 80.096 (78.901 to 81.292) | −9.681 (−11.524 to −7.839) | <0.001 | 0.879 (0.858 to 0.901) | <0.001 |
CI, confidence interval; DTAA, descending thoracic aortic aneurysm; RMST, restricted mean survival time.