Table 1.
Patient-level and hospital-level characteristics of the population receiving mechanical thrombectomy for acute ischaemic stroke compared between the elderly and their younger counterpart
| ≤80 years (n=7614 cases) | >80 years (n=1686 cases) | p Value | |
|---|---|---|---|
| Age | 63 (53–73) | 84 (82–87) | |
| Gender, female | 46.9% | 66.7% | <0.001 |
| Race, Caucasian | 60.2% | 67.6% | 0.013 |
| Median income level | |||
| <US$39 000 | 26.7% | 23.5% | 0.607 |
| US$39 000–$47 999 | 24.8% | 25.6% | |
| US$48 000–$62 999 | 23.6% | 23.5% | |
| ≥US$63 000 | 24.9% | 27.4% | |
| Payer, Medicare | 44.9% | 90.5% | <0.001 |
| Elixhauser comorbidity score | |||
| ≤2 | 37.2% | 30.6% | <0.001 |
| 3 | 21.7% | 26.5% | |
| ≥4 | 41.1% | 42.9% | |
| APR-DRG severity of illness | |||
| Mild | 0% | 0% | 0.418 |
| Moderate | 1.5% | 0.6% | |
| Major | 53.5% | 53.9% | |
| Extreme | 45% | 45.5% | |
| Thrombolysis (intravenous or intra-arterial) | 55.5% | 63.1% | 0.013 |
| Length of stay, days (survivors) | 9 (5–14) | 9 (6–13.6) | 0.711 |
| Length of stay, days (all patients) | 8 (4–13) | 8 (4–12) | 0.004 |
| Total charges, US$ (survivors) | 137 692 (95 139–207 687) | 137 756 (87 582–198 103) | 0.021 |
| Total charges, US$ (all patients) | 132 828 (90 661–205 835) | 126 238 (86 230–188 294) | <0.001 |
| Discharged home | 12.7% | 2.1% | <0.001 |
| Inpatient mortality | 21.6% | 33.7% | <0.001 |
| Hospital owner | |||
| Government, non-federal | 22.6% | 18.8% | 0.150 |
| Private, non-profit | 69.2% | 74.6% | |
| Private, investor-owned | 8.2% | 6.6% | |
| Teaching hospital | 84.2% | 80.6% | 0.122 |
Continuous variables expressed as median (25th centile–75th centile).
APR-DRG, All Patient Refined–Diagnosis Related Group.