| I型n (%) | II型n (%) | 中间型n (%) | c2 | P |
1组 | 11 (23.913) | 3 (18.750) | 7 (46.667) | 7.914 | 0.080 |
2组 | 15 (32.609) | 10 (62.500) | 5 (33.333) | ||
3组 | 20 (43.478) | 3 (18.750) | 3 (20.000) |