improvement in knee surgery × surg. > 10 years

0.82

0.74 - 0.87

<0.0001

improvement in knee surgery × surg. < 10 years

0.88

0.81 - 0.92

<0.0001

>10 years × < 10 years

0.77

0.67 - 0.84

<0.0001

Postoperative of M2

resident doctor × improvement in knee surgery

0.76

0.67 - 0.83

<0.0001

resident doctor × surg. > 10 years

0.85

0.78 - 0.89

<0.0001

resident doctor × surg. < 10 years

0.74

0.63 - 0.82

<0.0001

improvement in knee surgery × surg. > 10 years

0.84

0.77 - 0.89

<0.0001

improvement in knee surgery × surg. < 10 years

0.77

0.63 - 0.85

<0.0001

>10 years × < 10 years

0.83

0.76 - 0.88

<0.0001