组别

T2

T3

T4

T5

T6

T7

D1组(n = 27)

2.6 ± 0.3

2.3 ± 0.6

2 ± 0.5

1.3 ± 0.4

1.2 ± 0.2

1.2 ± 0.3

D2组(n = 30)

1.8 ± 0.4^a

1.3 ± 0.2^a

1.3 ± 0.4^a

1.0 ± 0.3^a

0.8 ± 0.4

0.8 ± 0.2

D3组(n = 30)

1.7 ± 0.4^a

1.2 ± 0.3^a

1.3 ± 0.4^a

0.8 ± 0.4^ab

0.8 ± 0.3

0.7 ± 0.2