Table 1.
AJAX (n = 116) | ECAR (n = 107) | IMPROVE (n = 613) | |
---|---|---|---|
Randomized group | |||
EVAR/EVAR strategy | 57 (49·1) | 56 (52·3) | 316 (51·5) |
Open repair | 59 (50·9) | 51 (47·7) | 297 (48·5) |
rAAA suitable for EVAR‡ | n = 113 | n = 104 | n = 310 |
EVAR/EVAR strategy | 57 (50·4) | 54 (51·9) | 168 (54·2) |
Open repair | 56 (49·6) | 50 (48·1) | 142 (45·8) |
Procedure commenced | |||
EVAR | 57 (49·1) | 56 (52·3) | 192 (31·3) |
Open repair | 59 (50·9) | 50 (46·7) | 331 (54·0) |
No aneurysm repair | 0 (0) | 1 (0·9) | 90 (14·7) |
Age (years)* | 74·2(9·4) | 74·4(10·6) | 76·7(7·6) |
Sex ratio (M : F) | 99 : 17 | 97 : 10 | 480 : 133 |
Admission mean arterial BP (mmHg)*, § | n = 113 | n = 104 | n = 601 |
87(27) | 108(30) | 81(24) | |
Hardman index | n = 61 | n = 105 | n = 539 |
0 | 26 (43) | 41 (39·0) | 164 (30·4) |
1 | 19 (31) | 44 (41·9) | 254 (47·1) |
2 | 12 (20) | 11 (10·5) | 94 (17·4) |
≥ 3 | 4 (7) | 9 (8·6) | 27 (5·0) |
Morphology | |||
Maximum aortic diameter (mm)* |
n = 92 76(16) |
n = 106 77(20) |
n = 518 84(19) |
Aneurysm neck diameter (mm)*, ¶ |
n = 92 26(4) |
n = 106 24(4) |
n = 430 26(4) |
Neck length (mm)† |
n = 92 25 (19–34) |
n = 101 21 (15–30) |
n = 481 22 (10–34) |
Proximal neck angle (°)* |
n = 92 39(21) |
n = 96 34(26) |
n = 478 33(20) |
Values in parentheses are percentages unless indicated otherwise;
values are mean(s.d.) and
median (i.q.r.).
Suitability for endovascular aneurysm repair (EVAR) in IMPROVE defined by local assessment of suitability if available; otherwise a core laboratory assessment of ‘within liberal instructions for use’ was used to define suitability. Suitability not assessed in 46 ruptured abdominal aortic aneurysms (rAAAs) in IMPROVE and one in ECAR.
Mean arterial BP recorded only in ECAR; for AJAX and IMPROVE it was approximated by 2/3 diastolic + 1/3 systolic BP.
IMPROVE and ECAR measured top neck diameter; AJAX measured maximum neck diameter.