Table 2.
Association of diagnoses and conditions during the index hospital admission with readmission within 30 days for all patients undergoing AAA procedure [Frequency (Column percentage)]
| Overall (n = 4723) |
Not Readmitted (n = 4368) |
Readmitted (n = 355) |
Relative risk of readmission | ||||||
|---|---|---|---|---|---|---|---|---|---|
| N | % | N | % | N | % | RR | (95% CI) | p-value* | |
| Acute Conditions | |||||||||
| Arterial embolism and thrombosis | 504 | (10.7) | 458 | (10.5) | 46 | (13.0) | 1.25 | (0.93 – 1.67) | .14 |
| Cardiac/MI | 114 | (2.4) | 105 | (2.4) | 9 | (2.5) | 1.05 | (0.56 – 1.98) | .87 |
| Fluid and electrolyte disorders | 656 | (13.9) | 593 | (13.6) | 63 | (17.7) | 1.34 | (1.03 – 1.73) | .02 |
| Renal failure | 376 | (8.0) | 325 | (7.4) | 51 | (14.4) | 1.94 | (1.47 – 2.56) | <.0001 |
| Respiratory Problems | 564 | (11.9) | 504 | (11.5) | 60 | (16.9) | 1.50 | (1.15 – 1.95) | .002 |
| Other venous embolism or thrombosis | 165 | (3.5) | 150 | (3.4) | 15 | (4.2) | 1.22 | (0.74 – 2.00) | .43 |
| Chronic Conditions | |||||||||
| Atrial fibrillation | 541 | (11.5) | 492 | (11.3) | 49 | (13.8) | 1.24 | (0.93 – 1.65) | .14 |
| Anemia | 473 | (10.0) | 424 | (9.7) | 49 | (13.8) | 1.44 | (1.08 – 1.92) | .01 |
| Chronic kidney disease | 554 | (11.7) | 491 | (11.2) | 63 | (17.7) | 1.62 | (1.26 – 2.10) | .0002 |
| COPD | 1149 | (24.3) | 1052 | (24.1) | 97 | (27.3) | 1.17 | (0.94 – 1.46) | .17 |
| Other conduction disorders | 214 | (4.5) | 198 | (4.5) | 16 | (4.5) | 0.99 | (0.61 – 1.61) | .98 |
| Congestive heart failure | 348 | (7.4) | 309 | (7.1) | 39 | (11.0) | 1.55 | (1.13 – 2.12) | .006 |
| Chronic heart disease | 2043 | (43.3) | 1891 | (43.3) | 152 | (42.8) | 0.98 | (0.80 – 1.20) | .86 |
| Depressive disorders | 253 | (5.4) | 233 | (5.3) | 20 | (5.6) | 1.05 | (0.68 – 1.63) | .11 |
| Diabetes | 1095 | (23.2) | 1006 | (23.0) | 89 | (25.1) | 1.11 | (0.88 – 1.40) | .38 |
| Disorders of lipid metabolism | 2351 | (49.8) | 2188 | (50.1) | 163 | (45.9) | 0.86 | (0.70 – 1.05) | .13 |
| Hypertension | 3289 | (69.6) | 3039 | (69.6) | 250 | (70.4) | 1.04 | (0.83 – 1.29) | .73 |
| Osteoarthritis | 317 | (6.7) | 292 | (6.7) | 25 | (7.0 | 1.05 | (0.71 – 1.56) | .79 |
| Other thyroid disorders | 362 | (7.7) | 333 | (7.6) | 29 | (8.2) | 1.07 | (0.74 – 1.54) | .71 |
| Tobacco-related disorder | 2589 | (54.8) | 2407 | (55.1) | 182 | (51.3) | 0.87 | (0.71 – 1.06) | .16 |
| Infections | |||||||||
| Any Infection | 325 | (6.9) | 283 | (6.5) | 42 | (11.8) | 1.82 | (1.34 – 2.46) | <.0001 |
| Cellulitis or abscess of leg/foot | 16 | (0.3) | 14 | (0.3) | 2 | (0.6) | 1.67 | (0.45 – 6.12) | .44 |
| Other infection | 105 | (2.2) | 92 | (2.1) | 13 | (3.7) | 1.67 | (1.00 – 2.81) | .05 |
| Pneumonia | 121 | (2.6) | 104 | (2.4) | 17 | (4.8) | 1.91 | (1.22 – 3.01) | .005 |
| Sepsis | 70 | (1.5) | 57 | (1.3) | 13 | (3.7) | 2.53 | (1.53 – 4.17) | <.001 |
| Surgical site infection | 35 | (0.7) | 26 | (0.6) | 9 | (2.5) | 3.48 | (1.97 – 6.17) | <.0001 |
| Urinary tract infection | 98 | (2.1) | 90 | (2.1) | 8 | (2.3) | 1.09 | (0.56 – 2.13) | .80 |
| Other Complications | |||||||||
| Complications with procedure | 348 | (7.4) | 313 | (7.2) | 35 | (9.9) | 1.38 | (0.99 – 1.92) | .06 |
| Hemorrhage or hematoma | 145 | (3.1) | 125 | (2.9) | 20 | (5.6) | 1.88 | (1.24 – 2.87) | .003 |
| Posthemorrhagic anemia | 546 | (11.6) | 492 | (11.3) | 54 | (15.2) | 1.37 | (1.04 – 1.81) | .02 |
*p-value based on chi-square comparison by readmission status.
AAA = abdominal aortic aneurysm. MI = myocardial infarction. COPD = chronic obstructive pulmonary disease