Risk factors at presentation of PMF selected at the stepwise Cox regression model for their significant association with fatal and nonfatal thrombosis in the follow-up
| . | No. (%) . | Hazard ratio . | 95% CI . | P . |
|---|---|---|---|---|
| Age older than 60 y | 393 (56) | 2.34 | 1.24-4.39 | .01 |
| JAK2 V617F | 259 (37) | 1.92 | 1.10-3.34 | .02 |
| WBC count 15 or higher, ×109/L | 162 (23) | 1.72 | 0.97-2.72 | .06 |
| . | No. (%) . | Hazard ratio . | 95% CI . | P . |
|---|---|---|---|---|
| Age older than 60 y | 393 (56) | 2.34 | 1.24-4.39 | .01 |
| JAK2 V617F | 259 (37) | 1.92 | 1.10-3.34 | .02 |
| WBC count 15 or higher, ×109/L | 162 (23) | 1.72 | 0.97-2.72 | .06 |
Level of significance < .10.
PMF indicates primary myelofibrosis; and WBC, white blood cell.