Table 5 Multivariate analysis of the correlation between research factors and IKDC classification

 Male

0.532

0.234

5.151

0.023*

1.076

2.697

 Female‡

–

–

–

–

–

–

  < 18.5

1.104

0.497

4.926

0.026*

1.138

7.996

 18.5 ~ 25

0.531

0.285

3.467

0.063

0.972

2.974

  ≥ 25‡

–

–

–

–

–

–

 Grade 0 ~ 1

0.331

0.506

0.427

0.514

0.516

3.751

 Grade 2

−0.223

0.481

0.214

0.644

0.312

2.056

 Grade 3 ~ 4‡

–

–

–

–

–

–

 No

−0.179

0.232

0.597

0.440

0.531

1.317

 Yes‡

–

–

–

–

–

–

  ≤ 14

3.034

0.498

37.069

0.000*

7.822

55.147

 14 ~ 25

2.142

0.418

26.293

0.000*

3.755

19.317

 25 ~ 45

0.545

0.33

2.732

0.098

0.904

3.294

  ≥ 45‡

–

–

–

–

–

–

  ≤ 1

1.256

0.37

11.501

0.001*

1.699

7.265

 1 ~ 6

1.242

0.303

16.826

0.000*

1.914

6.265

 6 ~ 24

1.180

0.287

16.949

0.000*

1.855

5.703

 >24‡

–

–

–

–

–

–

 No

0.089

0.624

0.021

0.886

0.322

3.717

 Yes‡

–

–

–

–

–

–

 No injury

1.853

0.469

15.629

0.000*

2.545

15.975

 Grade I

1.466

0.572

6.569

0.010*

1.412

13.277

 Grade II

0.758

0.488

2.418

0.120

0.820

5.551

 Grade III ~ IV‡

–

–

–

–

–

–

 Grade 0

0.184

0.690

0.071

0.790

0.311

4.646

 Grade I

−0.112

0.685

0.027

0.870

0.233

3.425

 Grade II

−0.563

0.707

0.634

0.426

0.142

2.277

 Grade III ~ IV‡

–

–

–

–

–

–

 Saucerization

0.546

0.387

1.983

0.159

0.807

3.688

 Saucerization with repair

−0.262

0.678

0.149

0.699

0.204

2.907

 Total meniscectomy‡

–

–

–

–

–

–