| Group 1: PH unlikely (n:45) | Group 2: PH possible, likely (n:5) | Total |
Stage 1 | 13 | 0 | 13 |
Stage 2 | 24 | 2 | 26 |
Stage 3 | 6 | 0 | 6 |
Stage 4 | 2 | 3 | 5 |