| Group I | Group II | Group III |
No. of recurrences/No. of pseudo-invasions | 0/18 | 3 (D:2, C:1)/3 | 0/0 |
No. of recurrences/No. of true invasions | 5 (D:2, C:3)/8 | 1 (C:1)/1 | 2 (D:1, C:1)/2 |