Table 1.
Study population.
| Variable | |
|---|---|
| Patients, N | 92,530 |
| Patients admitted within the 4.5-h time window, N (%) | 37,414 (40) |
| Year of admission, N (%) | |
| 2008 | 16,801 (18) |
| 2009 | 17,856 (19) |
| 2010 | 18,979 (21) |
| 2011 | 19,229 (21) |
| 2012 | 19,674 (21) |
| Age, median (IQR) | 76 (68, 83) |
| Male sex, N (%) | 46,537 (50) |
| Estimated pre-stroke mRS score, N (%) | |
| 0 | 56,408 (61) |
| 1 | 12,334 (13) |
| 2 | 11,195 (12) |
| 3 | 8,181 (9) |
| 4 | 3,535 (4) |
| 5 | 877 (1) |
| NIHSS score at admission, median (IQR) | 4 (2, 9) |
| Comorbidities, N (%) | |
| Atrial fibrillation | 27,234 (29) |
| Diabetes mellitus | 25,969 (28) |
| Prior stroke event | 24,234 (26) |
| Admitting hospital, N (%) | |
| Stroke center | 21,268 (23) |
| Regional SU | 17,260 (19) |
| Local SU | 36,443 (39) |
| Hospitals w/o SU | 17,559 (19) |
IQR, interquartile range; mRS, modified Rankin scale; NIHSS, National Institute of Health Stroke Scale; SU, stroke unit.