Multivariable model for advanced imaging (CTA/MRI/MRA) for stroke/TIA work-up in the overall group stratified by age groups
| Overall | 55 yr or Younger | Older Than 55 yr | ||||
|---|---|---|---|---|---|---|
| OR (95% CI) | P Value | OR (95% CI) | P Value | OR (95% CI) | P Value | |
| Age 55 yr or younger | 1.90 (1.63–2.22) | <.01 | – | – | – | – |
| Race, black (reference white)a | 1.27 (1.08–1.49) | <.01 | 1.02 (0.73–1.41) | .92 | 1.34 (1.12–1.61) | <.01 |
| Sex, male | 1.06 (0.95–1.18) | .32 | 1.06 (0.81–1.39) | .69 | 1.06 (0.94–1.20) | .31 |
| Academic | 1.43 (1.20–1.71) | <.01 | 1.21 (0.85–1.72) | .29 | 1.51 (1.22–1.85) | <.01 |
| High poverty | 0.85 (0.69–1.03) | .10 | 0.71 (0.49–1.04) | .08 | 0.91 (0.73–1.15) | .44 |
| ED presentation | 1.95 (1.65–2.29) | <.01 | 2.74 (1.81–4.14) | .01 | 1.84 (1.54–2.19) | <.01 |
| Insurance (any, reference self-pay) | 0.91 (0.70–1.18) | .47 | 0.90 (0.63–1.28) | .56 | 0.94 (0.64–1.39) | .76 |
| NIHSS score | 0.93 (0.92–0.94) | <.01 | 0.93 (0.92–0.95) | <.01 | 0.93 (0.92–0.94) | <.01 |
| Event type (reference TIA) | ||||||
| ICH/SAH | 1.22 (0.99–1.50) | .07 | 1.98 (1.26–3.12) | <.01 | 1.04 (0.82–1.33) | .72 |
| Infarct | 2.51 (2.19–2.88) | <.01 | 2.46 (1.78–3.41) | <.01 | 2.50 (2.16–2.91) | <.01 |
| Seen by stroke team or neurologist | 2.33 (2.07–2.63) | <.01 | 3.25 (2.38–4.43) | <.01 | 2.22 (1.95–2.53) | <.01 |
| Study year 2010 (reference 2005) | 1.66 (1.48–1.85) | <.01 | 1.77 (1.35–2.33) | <.01 | 1.64 (1.46–1.85) | <.01 |
Note:—ED indicates emergency department; ICH, intracranial hemorrhage.
↵a Race by age group interaction (P = .04).