| Severity |
|
Plasma concentration of coagulation factor |
Symptoms |
| Mild |
|
>5% of normal |
Bleeding only with severe injury or surgery |
| Moderate |
|
1%-5% of normal |
More frequent bleeding, hemarthrosis may occur |
| Severe |
|
<1% of normal |
Spontaneous bleeding and hemarthrosis, bleeding after minor injuries |
