Table 2 Parameters of the generalized linear model on the association between singe bundle and double bundle ACL reconstruction groups and post-operative pain with potential confounders (N = 209 patients) (* Statistically significant, p-value < 0.05)

Numbers of bundle ACL Reconstruction: double bundle (Ref. single bundle)

−0.45

0.198

−0.838

− 0.062

0.0228*

 4 h

1.94

0.193

1.562

2.318

< 0.001*

 8 h

2.16

0.193

1.782

2.538

< 0.001*

 12 h

1.43

0.193

1.052

1.808

< 0.001*

 16 h

1.26

0.193

0.882

1.638

< 0.001*

 20 h

1.24

0.193

0.862

1.618

< 0.001*

 24 h

1.07

0.193

0.692

1.448

< 0.001*

 Age in years (continuous)

− 0.04

0.010

− 0.060

− 0.020

< 0.001*

 Sex: Female (Ref. Male)

0.52

0.317

− 0.101

1.141

0.106

  Concomitant intraarticular injuries (Ref. no injury)

0.04

0.274

−0.497

0.577

0.885

 Meniscal repair (Ref. no repair)

−0.16

0.227

−0.605

0.285

0.487