Table 1.
Subject characteristics by tertiles of final abdominal aortic aneurysm diameter
| Overall (n = 1231) | Tertiles based on final AAA diameter | ||||
|---|---|---|---|---|---|
| Tertile 1 (n = 437) | Tertile 2 (n = 397) | Tertile 3 (n = 397) | P ‡ | ||
| Initial AAA diameter mm) | 35 (31–42) | 32 (31–34) | 37 (33–42) | 44 (37–50) | < 0·001§ |
| Final AAA diameter (mm) | 44 (35–57) | 32 (29–35) | 45 (42–50) | 60 (57–63) | |
| Follow-up (years) | 3·2 (1·7–6·0) | 3·1 (1·1–5·3) | 3·4 (2·0–6·0) | 3·4 (1·7–6·1) | 0·112§ |
| Age (years) | 67 (65–71) | 66 (65–71) | 67 (65–71) | 68 (65–71) | 0·456§ |
| Women* | 73 (5·9) | 37 (8·5) | 20 (5·0) | 16 (4·0) | 0·017 |
| IHD* | 286 (23·2) | 78 (17·8) | 97 (24·4) | 111 (28·0) | 0·028 |
| Hypertension* | 696 (56·5) | 231 (52·9) | 233 (58·7) | 232 (58·4) | 0·154 |
| Diabetes* | 79 (6·4) | 29 (6·6) | 34 (8·6) | 16 (4·0) | 0·033 |
| Statin use* | 383 (31·1) | 119 (27·2) | 155 (39·0) | 109 (27·5) | < 0·001 |
| ACE inhibitor use* | 294 (23·9) | 96 (22·0) | 104 (26·2) | 94 (23·7) | 0·357 |
| Current smoker* | 390 (31·7) | 129 (29·5) | 123 (31·0) | 138 (34·8) | 0·259 |
| Growth rate† | 1·43 (0·09) | −0·46 (0·10) | 1·62 (0·10) | 3·21 (0·11) | < 0·001¶ |
| (−2·26 to 6·06) | (−3·67 to 2·75) | (−1·59 to 4·83) | (0 to 6·42) | ||
Values are median (interquartile range) unless indicated otherwise;
*
values in parentheses are percentages.
†
Growth rates adjusted for a common initial diameter for tertiles (35 mm); values in parentheses are s.e. and 95 per cent reference range. AAA, abdominal aortic aneurysm; IHD, ischaemic heart disease; ACE, angiotensin-converting enzyme.
‡
χ2 test unless indicated otherwise;
§
Kruskal–Wallis test;
¶
from hierarchical model.