Group 1 (n = 200)

Group 2 (n = 15)

p-value

0 - 10 ng/ml

93 (46.5%)

6 (40.0%)

0.827†

10 - 20 ng/ml

57 (28.5%)

5 (33.3%)

0.769‡

20 - 30 ng/ml

24 (12.0%)

3 (20.0%)

0.411‡

30 - 40 ng/ml

18 (9.0%)

1 (6.7%)

>0.999‡

40 - 60 ng/ml

8 (4.0%)

0 (0.0%)

>0.999‡