Table 1.
Baseline Characteristics by Admission Quarter of Patients With Ischemic Stroke by the Get With the Guidelines ‐ Stroke Registry Form 2009 to 2013
| Variable | Level | Overall | Jul–Sep | Oct–Dec | Jan–Mar | Apr–Jun | P Value |
|---|---|---|---|---|---|---|---|
| Total | 967 891 | 242 505 | 243 961 | 239 309 | 242 116 | ||
| Demographic | |||||||
| Age, y | Median y (Q1–Q3) | 73 (61–83) | 73 (61–83) | 73 (62–83) | 73 (61–83) | 73 (61–83) | <0.0001 |
| Sex, % | Female | 52.27 | 52.04 | 52.49 | 52.52 | 52.01 | <0.0001 |
| Race, % | White | 69.73 | 69.29 | 69.93 | 70.22 | 69.47 | <0.0001 |
| Black | 17.10 | 17.41 | 17.05 | 16.17 | 17.22 | ||
| Hispanic | 6.81 | 6.95 | 6.66 | 6.75 | 6.87 | ||
| Asian | 2.79 | 2.80 | 2.83 | 2.73 | 2.82 | ||
| Other (includes UTD) | 3.57 | 3.55 | 3.54 | 3.59 | 3.62 | ||
| Arrival mode, % | Private transport | 39.90 | 41.04 | 39.15 | 38.70 | 40.72 | <0.0001 |
| EMS | 58.44 | 57.25 | 59.27 | 59.67 | 57.58 | ||
| ND or Unknown | 1.65 | 1.72 | 1.58 | 1.62 | 1.70 | ||
| Off hours arrival, % | Yes | 43.72 | 43.89 | 43.39 | 43.60 | 43.99 | <0.0001 |
| Onset to arrival time | Median min (Q1–Q3) | 193 (67–597) | 195 (67–600) | 190 (66–603) | 196 (68–601) | 190 (66–582) | <0.0001 |
| NIHSS score | Median (Q1–Q3) | 4 (1–10) | 4 (1–9) | 4 (1–10) | 4 (2–10) | 4 (1–10) | <0.0001 |
| Medical history | |||||||
| Atrial fibrillation, % | Yes | 18.48 | 17.86 | 19.00 | 18.88 | 18.17 | <0.0001 |
| Prosthetic heart valve, % | Yes | 1.34 | 1.33 | 1.35 | 1.34 | 1.34 | 0.8856 |
| Previous stroke/TIA, % | Yes | 31.34 | 31.51 | 31.33 | 31.17 | 31.36 | 0.0932 |
| CAD/prior MI, % | Yes | 25.74 | 25.42 | 25.70 | 26.04 | 25.81 | <0.0001 |
| Carotid stenosis, % | Yes | 3.90 | 3.77 | 3.89 | 3.96 | 3.98 | 0.0010 |
| Diabetes mellitus, % | Yes | 32.98 | 33.30 | 32.78 | 32.80 | 33.05 | 0.0002 |
| PVD, % | Yes | 4.86 | 4.77 | 4.90 | 4.86 | 4.90 | 0.1275 |
| Hypertension, % | Yes | 76.38 | 76.28 | 76.50 | 76.38 | 76.37 | 0.3317 |
| Smoker, % | Yes | 17.60 | 18.28 | 17.14 | 17.16 | 17.82 | <0.0001 |
| Dyslipidemia, % | Yes | 43.42 | 43.62 | 43.68 | 42.92 | 43.44 | <0.0001 |
| Heart failure, % | Yes | 9.07 | 8.88 | 9.21 | 9.18 | 9.02 | 0.0001 |
CAD indicates coronary artery disease; EMS, emergency medical services; MI, myocardial infarction; ND, not determined; NIHSS, National Institutes of Health Stroke Scale; PVD, peripheral vascular disease; Q1–Q3, 25th to 75th percentiles; TIA, transient ischemic attack; UTD, unable to determine.