Table 5.
Unadjusted and Adjusted Multivariate Logistic Regression Models for Teaching Hospitals Clinical Outcomes Between April–June Versus July–September
| Clinical Outcome | Apr–Jun N (%) | Jul–Sep N (%) | Unadjusted OR (95% CI) | P Value | Adjusted OR (95% CI) | P Value |
|---|---|---|---|---|---|---|
| Teaching hospitals | ||||||
| Mortality | 6902 (4.9) | 6692 (4.7) | 1.04 (1.00–1.08) | 0.0496 | 1.04 (1.01–1.08) | 0.0202 |
| Home discharge | 70 393 (49.7) | 71 159 (50.1) | 0.98 (0.97–1.00) | 0.0299 | 0.98 (0.96–1.01) | 0.1343 |
| Independent status | 55 239 (49.1) | 54 814 (49.5) | 0.98 (0.96–1.00) | 0.0767 | 0.98 (0.95–1.00) | 0.0987 |
| LOS >4 d | 55 363 (40.5) | 55 468 (40.4) | 1.00 (0.99–1.02) | 0.8039 | 0.99 (0.97–1.01) | 0.1989 |
| Door‐to‐CT acquisition time <25 min | 25 277 (23.7) | 26 097 (24.5) | 0.96 (0.94–0.98) | 0.0001 | 0.96 (0.93–0.98) | 0.0009 |
| Door‐to‐Needle time <60 min | 3594 (35.6) | 3588 (34.9) | 1.03 (0.97–1.09) | 0.4072 | 1.01 (0.95–1.08) | 0.6482 |
| Defect‐free care | 121 057 (91.7) | 121 510 (91.8) | 0.99 (0.96–1.02) | 0.4213 | 0.98 (0.94–1.02) | 0.2419 |
| Symptomatic intracranial hemorrhage <36 h | 542 (4.4) | 559 (4.4) | 1.00 (0.89–1.12) | 0.9416 | 0.99 (0.88–1.12) | 0.9081 |
| Nonteaching hospitals | ||||||
| Mortality | 4114 (4.1) | 3780 (3.8) | 1.09 (1.04–1.15) | 0.0005 | 1.08 (1.03–1.14) | 0.0022 |
| Home discharge | 50 629 (50.4) | 51 183 (51.0) | 0.98 (0.96–1.00) | 0.0206 | 1.00 (0.98–1.03) | 0.9604 |
| Independent status | 39 338 (49.8) | 39 080 (50.6) | 0.97 (0.95–0.99) | 0.0031 | 0.98 (0.95–1.02) | 0.2843 |
| LOS >4 d | 35 918 (36.6) | 35 651 (36.3) | 1.01 (0.99–1.03) | 0.1565 | 1.00 (0.98–1.03) | 0.7601 |
| DCT <25 | 19 527 (26.3) | 20 015 (27.1) | 0.96 (0.93–0.99) | 0.0034 | 0.96 (0.93–0.99) | 0.0158 |
| DTN <60 | 1727 (29.8) | 1832 (31.1) | 0.93 (0.85–1.01) | 0.0930 | 0.93 (0.85–1.02) | 0.1274 |
| Defect‐free care | 84 421 (89.8) | 85 029 (90.1) | 0.96 (0.94–0.99) | 0.0040 | 0.98 (0.94–1.02) | 0.3543 |
| Symptomatic intracranial hemorrhage <36 h | 314 (4.6) | 307 (4.4) | 1.05 (0.90–1.22) | 0.5572 | 1.07 (0.91–1.26) | 0.3905 |
Adjustment variables: age, sex, race, atrial fibrillation/flutter, previous stroke/transient ischemic attack, coronary artery disease/prior myocardial infarction, carotid stenosis, diabetes mellitus (combined), peripheral vascular disease, hypertension, dyslipidemia, smoking, arrival off hours vs on hours, National Institutes of Health Stroke Scale score, region, hospital type, number of beds, annual ischemic stroke volume, annual IV tissue‐type plasminogen activator volume, rural vs urban, primary stroke center status, year of admission. CI indicates confidence interval; LOS, length of stay >4 d; OR, odds ratio.