Table 2 Univariable analyses results before matching and after matching

Gender

Female

ref

ref

Male

0.88 (0.58–1.31)

0.537

0.97 (0.60–1.56)

Age (per 10 years increase)

1.21 (1.05–1.40)

0.011

1.00 (0.83–1.20)

Diagnosis

AO 31B1-3

ref

ref

AO 31A1-3

1.71 (1.15–2.59)

0.010

1.05 (0.65–1.70)

TFITA(per 10 h increase)

1.05 (1.02–1.07)

p < 0.001

1.06 (1.02–1.10)

low

ref

ref

high

2.41 (1.51–3.74)

p < 0.001

1.90 (1.09–3.29)

High energy injury

No

ref

ref

Yes

1.45 (0.71–2.71)

0.271

0.97 (0.42–2.10)

D-dimer(per 1 FEU increase)

1.01 (0.98–1.03)

0.655

1.00 (0.97–1.03)

ALB (per 1 g/l increase)

0.91 (0.87–0.95)

< 0.001

0.99 (0.94–1.05)

HGB (per 1 g/l increase)

0.99 (0.98-1.00)

0.005

1.00 (0.99–1.01)

PLT (per 1 10⁹/l increase)

1.00 (1.00–1.00)

0.905

1.00 (1.00–1.00)

Comorbidities

None

ref

ref

1–2

1.05 (0.69–1.63)

0.809

0.98 (0.59–1.64)

≥ 3

0.91 (0.51–1.59)

0.756

0.80 (0.41–1.53)