Table 1.
Demographic and baseline characteristics among acute ischemic stroke patients, 2007-2012
| N (%) or statistics by year |
||||||
|---|---|---|---|---|---|---|
| Variables | Year 2007 (n = 13,499) |
Year 2008 (n = 22,086) |
Year 2009 (n = 27,963) |
Year 2010 (n = 35,289) |
Year 2011 (n = 40,148) |
Year 2012 (n = 43,250) |
| Age | ||||||
| Median | 72 | 73 | 72 | 71 | 71 | 71 |
| Range | 18-105 | 18-107 | 18-106 | 18-111 | 18-119 | 18-106 |
| Mean (SE) | 70.42 (.13) | 70.43 (.10) | 70.55 (.09) | 70.03 (.08) | 69.99 (.07) | 69.95 (.07) |
| Gender | ||||||
| Female | 7007 (51.9) | 11,608 (52.6) | 14,509 (51.9) | 18,121 (51.4) | 20,695 (51.5) | 21,986 (50.8) |
| Race | ||||||
| Black | 2931 (21.7) | 4397 (19.9) | 5598 (20.0) | 7667 (21.7) | 8579 (21.4) | 9230(21.3) |
| White | 10,018 (74.2) | 16,418 (74.3) | 20,790 (74.3) | 25,589 (72.5) | 29,239 (72.8) | 31,640(73.2) |
| Other | 550 (4.1) | 1271 (5.8) | 1575 (5.6) | 2033 (5.8) | 2330 (5.8) | 2380 (5.5) |
| Admission NIHSS in groups | ||||||
| NIHSS < 10 | 3419 (25.3) | 5959 (27.0) | 8810 (31.5) | 14,256 (40.4) | 18,348 (45.7) | 23,244 (53.7) |
| NIHSS 10-19 | 887 (6.6) | 1655 (7.5) | 2227 (8.0) | 3539 (10.0) | 4169 (10.4) | 5003 (11.6) |
| NIHSS > 20 | 457 (3.4) | 749 (3.4) | 1107 (4.0) | 1885 (5.3) | 2186 (5.4) | 2677 (6.2) |
| Missing | 8736 (64.7) | 13,723 (62.1) | 15,819 (56.6) | 15,609 (44.2) | 15,445 (38.5) | 12,326 (28.5) |
Abbreviations: NIHSS, National Institutes of Health Stroke Scale; SE, standard error.