Trajectory Modelling to Assess Trends in Long-Term Readmission Rate among Abdominal Aortic Aneurysm Patients

Table 2

Covariates associated with Group 1 (chronic high-impact) as compared to low-impact users among patients who had rAAA repair.

Risk factors	Low-impact (n (%)) or mean (SD)	Chronic high-impact (n (%)) or mean (SD)	OR	CI (95%)	value
Patient demographics
Age	73.5 (SD 7.6)	75.5 (SD 7.5)	1.01	0.99–1.03	0.51
Female sex	283 (12.5)	91 (19.4)	3.03	2.05–4.48	0.005
Non-Caucasian ethnicity	332 (14.6)	326 (23.2)	1.58	1.09–2.29	0.21
Socioeconomic index	2.9 (SD 1.3)	2.9 (SD 1.3)	0.98	0.88–1.10	0.88
Past medical history
Comorbidity score	4.1 (SD 6.1)	5.8 (SD 8.4)	0.98	0.96–1.00	0.58
Heart failure	92 (4.1)	120 (8.5)	7.77	3.39–17.81	0.01
Peripheral vascular disease	164 (7.2)	143 (10.2)	7.24	4.06–12.94	<0.001
Mental health disorders	37 (1.6)	22 (1.6)	1.19	0.32–4.44	0.89
Diabetes	177 (7.8)	147 (10.5)	1.15	0.63–2.09	0.82
Ischaemic heart disease	293 (12.9)	169 (12.0)	1.06	0.68–1.65	0.88
Hypertension	1127 (49.7)	567 (40.3)	0.73	0.54–0.97	0.26
Procedural characteristics
Open repair	2095 (92.4)	1358 (96.6)	7.85	4.41–13.96	<0.001
Other vascular procedures	394 (17.4)	187 (13.3)	0.47	0.31–0.71	0.07
Other procedures	340 (13.9)	261 (18.6)	2.64	1.62–4.31	0.05
Admission to ITU	82 (8.9)	126 (3.0)	1.93	1.06–3.53	0.27
Length of stay	23.7 (SD 21.7)	3.4 (SD 4.2)	0.59	0.55–0.62	<0.001
Procedure-related complications
Renal failure	298 (13.1)	261 (18.6)	11.59	6.89–19.49	<0.001
Gastrointestinal complications	233 (10.3)	103 (7.3)	3.32	1.79–6.17	0.05
Graft complications	73 (3.2)	25 (1.8)	2.01	0.48–8.41	0.62
Wound complications	371 (16.4)	234 (16.6)	1.86	1.19–2.92	0.17
Hypotension	83 (3.7)	85 (6.0)	1.27	0.61–2.66	0.74
Anaemia	100 (4.4)	35 (2.5)	0.88	0.34–2.27	0.88
Hospital acquired complications
Total number of HACs	0.51 (SD 0.75)	0.42 (SD 0.64)	2.56	1.77–3.71	0.01
Respiratory tract infection	544 (23.9)	217 (15.4)	1.86	1.02–3.39	0.29
Urinary tract infection	89 (3.9)	10 (0.7)	0.84	0.24–3.00	0.89