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| Age (years) | Tissue BOT | Number of patients | Percentage of SBI | P value |
|---|---|---|---|---|
| ≧61 | ≦42.0 | 10 | 40.0% (4/10) | ＜.001** |
| ＞42.0 | 24 | 29.2% (7/24) | ||
| ＜61 | ≦42.0 | 1 | 100.0% (1/1) | |
| ＞42.0 | 52 | 5.8% (3/52) |
Chi-square test
BOT = blowout time, SBI = silent brain infarction
