Table 3 Association of time-of-day at symptom onset with area at risk > median, final infarct size > median or salvage index > median
Risk estimate | Time-of-day at symptom onset (hours) | p-value | |||
|---|---|---|---|---|---|
0–6 h (n = 273) | 6–12 h (n = 355) | 12–18 h (n = 309) | 18–24 h (n = 269) | ||
Area at risk > median | |||||
 OR (95% CI) | 0.916 (0.668–1.256)1 | Ref | 1.075 (0.792–1.459)2 | 0.813 (0.592–1.117)3 | 0.591 0.642 0.813 |
 ORadj* (95% CI) | 0.871 (0.617–1.231)1 | Ref | 0.990 (0.711–1.380)2 | 0.841 (0.582–1.216)3 | 0.441 0.952 0.363 |
Final infarct size > median | |||||
 OR (95% CI) | 1.030 (0.751–1.413)1 | Ref | 0.969 (0.714–1.315)2 | 0.916 (0.667–1.257)3 | 0.851 0.842 0.593 |
 ORadj* (95% CI) | 1.054 (0.757–1.467)1 | Ref | 1.024 (0.722–1.361)2 | 1.024 (0.720–1.456)3 | 0.761 0.962 0.893 |
Salvage index > median | |||||
 OR (95% CI) | 0.873 (0.633–1.205)1 | Ref | 0.948 (0.694–1.295)2 | 0.994 (0.719–1.375)3 | 0.411 0.742 0.973 |
 ORadj* (95% CI) | 0.827 (0.591–1.157)1 | Ref | 0.894 (0.647–1.234)2 | 0.913 (0.638–1.305)3 | 0.271 0.502 0.623 |