Table 2. Univariable Analysis of DWI-Positive Imaging.
| DWI Positive (Single or Multiple Lesions) | Risk Factor, No./Total No. (%) | RR (95% CI) | |
|---|---|---|---|
| Present | Absent | ||
| Medical history | |||
| Age >60 y | 103/612 (16.8) | 36/416 (8.7) | 1.94 (1.36-2.78) |
| Female sex | 52/522 (10.0) | 87/506 (17.2) | 0.58 (0.42-0.80) |
| Hypertension | 68/480 (14.2) | 71/548 (13.0) | 1.09 (0.80-1.49) |
| Type 1 or 2 diabetes | 25/140 (17.9) | 114/888 (12.8) | 1.39 (0.94-2.06) |
| Current smoker | 17/105 (16.2) | 122/923 (13.2) | 1.25 (0.77-1.95) |
| Ischemic heart disease | 11/87 (12.6) | 128/941 (13.6) | 0.93 (0.52-1.65) |
| Atrial fibrillation | 6/51 (11.8) | 133/977 (13.6) | 0.86 (0.40-1.86) |
| Hyperlipidemia | 46/342 (13.5) | 93/686 (13.6) | 0.99 (0.71-1.38) |
| Taking aspirin prior to event | 48/347 (13.8) | 91/681 (13.4) | 1.04 (0.75-1.43) |
| Taking statin prior to event | 35/285 (12.3) | 104/743 (14.0) | 0.88 (0.61-1.25) |
| Taking antihypertensive medication prior to event | 59/419 (14.1) | 80/609 (13.1) | 1.07 (0.78-1.47) |
| No known vascular risk factors | 48/352 (13.6) | 91/676 (13.5) | 1.01 (0.73-1.40) |
| Any history of migraine | 25/256 (9.8) | 114/772 (14.8) | 0.66 (0.44-0.995) |
| History of migraine with aura | 10/80 (12.5) | 129/948 (13.6) | 0.92 (0.50-1.68) |
| Any self-reported stress | 14/158 (8.9) | 125/870 (14.4) | 0.62 (0.36-1.04) |
| Any motor or speech symptoms | 39/218 (17.9) | 100/810 (12.3) | 1.45 (1.03-2.03) |
| Isolated sensory symptoms | 61/482 (12.7) | 78/546 (14.3) | 0.89 (0.65-1.21) |
| Symptom duration <5 min | 19/122 (15.6) | 120/906 (13.2) | 1.18 (0.75-1.84) |
| Progression of first to last symptoms >10 min | 21/179 (11.7) | 118/849 (13.9) | 0.84 (0.55-1.30) |
| Ongoing symptoms at time of assessment | 72/370 (19.5) | 67/658 (10.2) | 1.91 (1.41-2.60) |
| Previous identical event | 20/238 (8.4) | 119/790 (15.1) | 0.56 (0.36-0.88) |
| Initial neurologic examination results normal | 79/740 (10.7) | 60/288 (20.8) | 0.51 (0.38-0.70) |
Abbreviations: DWI, diffusion-weighted imaging; RR, relative risk.