Time

6 mon

12 mon

18 mon

24 mon

Low risk

38.9% (7/18)

50% (9/18)

62.5% (10/16)

75% (12/16)

Intermediate/High risk

13.5% (5/37)

19.4% (7/36)

27.3% (9/33)

30.3% (10/33)

P

0.033

0.02

0.018

0.003