| Region | Type 1 | Type 2 | Type 3 | Type 4 |
| BRC (this study) | 52 (30%) | 36 (21%) | 44 (25%) | 41 (24%) |
| BRC (Ikeda et al.) | 177 (36%) | 108 (22%) | 98 (20%) | 108 (22%) |
| IC 1396 (Nakano et al.) | 236 (37%) | 45 (7%) | 249 (39%) | 109 (17%) |
| Orion | 167 (31%) | 16 (3%) | 221 (41%) | 135 (25%) |
| Taurus | 53 (42%) | 5 (4%) | 25 (20%) | 42 (34%) |
| Chamaeleon | 44 (63%) | 3 (4%) | 14 (18%) | 12 (15%) |
| ρ Oph | 185 (81%) | 7 (3%) | 21 (9%) | 16 (7%) |