组别

学习提高阶段(n = 24)

熟练掌握阶段(n = 37)

χ²

P

切口感染

1 (4.17%)

0 (0.00%)

皮肤瘀斑

5 (20.83%)

2 (5.41%)

乳房内血肿

4 (16.67%)

1 (2.70%)

乳房变形

2 (8.33%)

0 (0.00%)

总发生率

12 (50.00%)

3 (8.11%)

Fisher’s精确概率

<0.001

残留率

2 (8.33%)

0 (0.00%)

Fisher’s精确概率

0.074