Randomized controlled trials on outcomes of screening men aged 65 years and older for AAA with ultrasonography
| Study | Location | Sample size | Intervention/control | Mean length of follow-up, yr |
|---|---|---|---|---|
| Multicentre Aneurysm Screening Study (MASS) (17), (29)– (31) | Four sites in England | n = 67 700 | Intervention, n = 33 883; Control, n = 33 887 | 13.1 |
| Chichester (6), (18), (32), (33) | England | n = 6433 | Intervention, n = 3228; Control, n = 3205 | 15 |
| Viborg (16), (35)– (37) | Denmark | n = 12 639 | Intervention, n = 6333; Control, n = 6306 | 14 |
| Western Australia (15), (34), (38) | Australia | n = 38 704 | Intervention, n = 19 249; Control, n = 19 231 | 12.8 |
Note: AAA = abdominal aortic aneurysm.