Research Article

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

Table 3

Covariates associated with Group 3 (short-term high-impact) as compared to low-impact users among patients who had rAAA repair.

Risk factorsLow-impact (n (%)) or mean (SD)Short-term (n (%)) or mean (SD)ORCI (95%) value

Patient characteristics
Age73.5 (SD 7.6)75.2 (SD 7.5)1.021.02–1.030.005
Female sex283 (12.5)91 (19.4)1.481.26–1.730.02
Non-Caucasian ethnicity332 (14.6)78 (16.6)1.130.96–1.330.46
Socioeconomic index2.9 (SD 1.3)3.2 (SD 1.3)1.161.11–1.220.001

Past medical history
Comorbidity score4.1 (SD 6.1)4.8 (SD 6.9)1.021.00–1.030.06
Peripheral vascular disease164 (7.2)43 (9.1)1.160.92–1.460.53
Diabetes177 (7.8)43 (9.1)1.130.87–1.460.65
Hypertension1127 (49.7)232 (49.4)0.940.83–1.070.63
Heart failure92 (4.1)26 (5.5)0.760.53–1.070.41
Ischaemic heart disease293 (12.9)48 (10.2)0.730.60–0.890.10
Mental health disorders37 (1.6)7 (1.5)0.670.41–1.100.42
Stroke41 (1.8)6 (1.3)0.510.28–0.940.26

Procedural characteristics
Other vascular procedures394 (17.4)97 (20.6)1.070.90–1.290.69
Length of stay23.7 (SD 21.7)26.5 (SD 24.5)1.011.00–1.010.02
Other procedures340 (13.9)58 (12.3)0.890.73–1.080.54
Open repair2095 (92.4)424 (90.2)0.780.61–0.990.29
Admission to ITU82 (8.9)11 (2.3)0.710.49–1.040.37

Procedure-related complications
Anaemia100 (4.4)22 (4.7)1.080.82–1.430.77
Graft complications73 (3.2)15 (3.2)0.980.70–1.380.95
Gastrointestinal complications233 (10.3)42 (8.9)0.830.67–1.020.38
Wound complications371 (16.4)57 (12.1)0.710.59–0.860.07
Renal failure298 (13.1)54 (11.5)0.690.56–0.840.06

Hospital acquired complications
Urinary tract infection89 (3.9)23 (4.9)1.380.98–1.930.34
Respiratory tract infection544 (23.9)119 (25.3)1.120.89–1.410.62
Total number of HACs0.51 (SD 0.75)0.53 (SD 7.9)0.950.82–1.110.74
Hypotension83 (3.7)10 (2.1)0.560.37–0.840.16