Table I.
Demographics, comorbidities, and presenting characteristics for patients presenting with ruptured AAA treated with on-IFU versus off-IFU EVAR
| Off IFU | On IFU | P value | |
|---|---|---|---|
|
| |||
| n, (%) | 217 (35) | 404 (65) | |
| Center volume, median (25–75%), patients/year | 3 (2–4) | 3 (2–5) | 0.96 |
| Demographics and Comorbidities | |||
| Age, mean (95% CI), y | 73 (72–75) | 73 (72–74) | 0.27 |
| Women, % | 54 (25) | 73 (18) | 0.05 |
| White race, % | 187 (86) | 351 (87) | 0.90 |
| Hispanic, % | 12 (6) | 12 (3) | 0.12 |
| Hypertension, % | 167 (77) | 298 (74) | 0.33 |
| Diabetes, % | 41 (19) | 58 (14) | 0.13 |
| Tobacco abuse, % | 160 (74) | 303 (75) | 0.65 |
| CAD, % | 60 (28) | 92 (23) | 0.17 |
| CHF, % | 28 (13) | 56 (14) | 0.75 |
| COPD, % | 61 (28) | 105 (26) | 0.54 |
| Pre-op Statin, % | 91 (42) | 155 (38) | 0.51 |
| eGFR, mean (95% CI), mL/min/1.73 m2 | 56 (53–59) | 58 (55–60) | 0.51 |
| BMI, mean (95% CI), kg/m2 | 29 (28–30) | 28 (28–29) | 0.45 |
| Pre-operative domicile | 0.73 | ||
| Home | 212 (98) | 392 (97) | |
| Nursing home | 5 (2) | 11 (3) | |
| Homeless | 0 | 1 (0) | |
| Previous vascular treatment | |||
| Carotid, % | 3 (1) | 7 (2) | 0.74 |
| Lower extremity, % | 12 (6) | 15 (4) | 0.29 |
| Major amputation, % | 2 (1) | 1 (0) | 0.25 |
| Preoperative characteristics | |||
| Unfit for open repair, % | 63 (29) | 95 (24) | 0.27 |
| Lowest pre-intubation sys BP, mean (95% CI), mm Hg | 95 (91–99) | 95 (92–98) | 0.97 |
| Pre-op hemoglobin, mean (95% CI), g/dL | 11.6 (11.3–11.9) | 11.5 (11.3–11.7) | 0.68 |
| Mental status, % | 0.79 | ||
| Normal | 161 (75) | 308 (77) | |
| Disoriented | 35 (16) | 57 (14) | |
| Unconscious | 20 (9) | 36 (9) | |
| Preoperative cardiac arrest, % | 21 (10) | 26 (7) | 0.15 |
| Pre-op anticoagulation, % | 21 (10) | 60 (15) | 0.08 |
| Previous infrarenal aortic surgery, % | 9 (4) | 23 (6) | 0.40 |
| AAA max AP diameter, mean (95% CI), mm | 76 (73–79) | 72 (70–74) | 0.01 |
| Neck length, median (25–75%), mm | 15 (10–25) | 24 (18–30) | <0.001 |
| Neck diameter, mean (95% CI), mm | 24 (23–25) | 24 (24–25) | 0.51 |
| Infrarenal neck angle, degrees | <0.001 | ||
| <45 | 120 (55) | 323 (80) | |
| 45–60 | 28 (13) | 81 (20) | |
| 61–75 | 46 (21) | 0 | |
| 76–90 | 14 (6) | 0 | |
| >91 | 9 (4) | 0 | |