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)