Table 1. Summary and comparison of studies investigating the relationship between PVAT density changes and AAA progression.

Years	Subjects	Center	Conclusions	References
Abbreviations: AAA, abdominal aortic aneurysm; ILT, intraluminal thrombus; PVAT, perivascular adipose tissue.
2009–2016	Non-treated asymptomatic AAA (n = 140), aortoiliac occlusive disease (n = 104), and individuals without aortic pathology (n = 97)	Multicenter	AAA patients presented higher intra-individual PVAT differences.	[77]
2016–2020	AAA (n = 100) and control (without underlying aortic disease; n = 100)	Single-center	Alterations in PVAT density were observed both between AAA patients and controls and between aneurysmal and non-aneurysmal segments in AAA patients.	[78]
2015–2022	AAA with or without ILT (n = 167)	Multicenter	Elevated PVAT attenuation was independently associated with AAA progression, including in AAA cases with ILT.	[79]
2018–2022	Asymptomatic AAA (n = 40), symptomatic AAA (n = 30), and control with normal abdominal aorta (n = 18)	Single-center	PVAT attenuation was not increased in stable AAAs, but was increased in symptomatic AAA patients.	[80]