| 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‡ |