Eleven-Year Outcomes of a Screening Project for Abdominal Aortic Aneurysm (AAA) in 65-Year-Old Men

Figures & data

Figure 1 The inclusion process and the registered events after screening, at Oslo University Hospital.

Abbreviation: AD, aortic diameter.

Table 1 Causes of Death for the Three Aortic Diameter Groups

Causes of Death	AAA (n = 49)	Subaneurysmal Aortic Dilatation (n = 64)	Normal Aortic Diameter (n = 58)	p-value
Infection	4 (8.2)	4 (6.3)	8 (13.8)	0.37^‡
Sudden death/unknown cause	3 (6.1)	2 (3.1)	1 (1.7)	0.51^‡
Malignant disease	20 (40.8)	30 (46.9)	28 (48.3)	0.72^†
Lung cancer*	10 (50.0)*	11 (36.7)*	4 (14.3)*	0.11^†
Cardiac-/cerebrovascular events	6 (12.2)	14 (21.9)	10 (17.2)	0.41^†
COPD	5 (10.2)	3 (4.7)	1 (1.7)	0.16^‡
AAA-related	2 (4.1)	0	0	0.081^‡
Other	6 (12.2)	6 (9.4)	5 (8.6)	0.85^‡
Missing data	3 (6.1)	5 (7.8)	5 (8.6)	0.94^‡

Notes: Column headings are stated in bold text. Data are presented as n (%). P-values were calculated using Pearson’s Chi-squared test^† or Fisher’s exact test^‡. *Cases of lung cancer (italicized text) are noted as a separate subgroup under malignant disease, with the percentages given relative to the total number of participants who died from malignant disease in each of the three aortic diameter groups.

Abbreviation: COPD, chronic obstructive pulmonary disease.

Figure 2 Kaplan–Meier survival curves of the study population allocated to three groups according to aortic diameter upon screening: AAA, subaneurysmal- and normal aortic diameter. The latest censor date was 31 July 2022.

Table 2 Aortic Diameter Upon Repair and Aortic Growth Rate for Five Groups Defined by Aortic Diameter Upon Screening

Aortic Diameter Upon Screening (mm)	n	AAA Repairs – n	Aortic Diameter Upon Repair – Median (IQR)	Aortic Growth Rate in mm Per Year – Median (IQR)
25–29	859	5	50 (5.0)*	2.9 (1.2)
30–39	258	16	57 (6.5)**	3.6 (0.9)
40–49	47	28	56 (4.0)***	4.0 (3.0)
50–54	4	3	56 (4.0)	5.7 (4.7)
≥55	21	21	63 (15.0)
Total	1189	73	57 (6.0)	4.0 (3.3)

Notes: Column headings are stated in bold text. All AAA repairs are included, also ruptures. In the subaneurysm group (aortic diameter 25–29 mm) aortic diameter upon repair was missing for one participant. *Two men received repair with an aortic diameter <55 mm, both had bilateral common iliac artery (CIA) aneurysms where at least one was ≥35 mm. **Three men received repair with an aortic diameter <55 mm, one due to a mycotic contained rupture, one patient insisted on treatment at aortic diameter of 51 mm and one due to bilateral CIA aneurysms where at least one was ≥35 mm. ***Four men received repair with an aortic diameter <55 mm. One had unilateral CIA and internal iliac artery (IIA) aneurysms, three had bilateral CIA aneurysms. Three of four had at least one aneurysm ≥35 mm.