Table 3 The univariable analysis

Sex

P = 0.358

P = 0.004*

P = 0.810

P = 0.030*

P = 0.353

 Male

− 5.8 ± 9.3 mm

13.0 ± 7.5 mm

− 1 ± 8 degrees

2 ± 8 degrees

− 9 ± 14 degrees

 Female

− 4.1 ± 5.0 mm

8.6 ± 4.6 mm

− 1 ± 9 degrees

− 2 ± 8 degrees

− 6 ± 10 degrees

Side

P = 0.064

P = 0.594

P = 0.490

P = 0.020*

P = 0.666

 Right

− 7.3 ± 9.0 mm

12.3 ± 8.1 mm

− 2 ± 7 degrees

− 1 ± 7 degrees

− 7 ± 14 degrees

 Left

− 4.1 ± 7.7 mm

11.5 ± 6.4 mm

0 ± 8 degrees

2 ± 8 degrees

− 9 ± 13 degrees

Brain injury

P = 0.746

P = 0.533

P = 0.067

P = 0.830

P = 0.085

 Negative

− 5.4 ± 8.6 mm

11.9 ± 7.1 mm

0 ± 8 degrees

1 ± 8 degrees

− 9 ± 14 degrees

 Positive

− 4.4 ± 4.5 mm

10.3 ± 6.1 mm

− 6 ± 7 degrees

0 ± 6 degrees

0 ± 3 degrees

Scapula fracture

P = 0.402

P = 0.847

P = 0.938

P = 0.004*

P = 0.269

 Negative

− 5.7 ± 8.2 mm

11.8 ± 6.8 mm

− 1 ± 7 degrees

0 ± 7 degrees

− 7 ± 13 degrees

 Positive

− 3.9 ± 9.1 mm

11.5 ± 8.0 mm

− 1 ± 8 degrees

5 ± 11 degrees

− 11 ± 15 degrees

AO

P = 0.2094

P = 0.011*

P = 0.446

P = 0.813

P = 0.124

 Simple

− 3.0 ± 6.5 mm

8.6 ± 5.9 mm

1 ± 8 degrees

2 ± 7 degrees

− 5 ± 12 degrees

 Wedge

− 6.1 ± 7.9 mm

12.5 ± 6.1 mm

− 2 ± 8 degrees

1 ± 8 degrees

− 7 ± 13 degrees

 Multifragmentary

− 6.5 ± 10.2 mm

13.8 ± 8.4 mm

− 1 ± 8 degrees

0 ± 8 degrees

− 12 ± 14 degrees

Age

P = 0.277

P = 0.255

P = 0.938

P = 0.679

P = 0.324

 β

0.063

− 0.056

0.043

− 0.023

− 0.090

Rib fractures

P = 0.933

P = 0.776

P = 0.001*

P = 0.401

P = 0.636

 β

0.026

− 0.074

− 0.917

− 0.244

− 0.231