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Table 4 Subgroup analysis of patients with heterotopic ossifications

From: Risk factors for complications and adverse outcomes in polytrauma patients with associated upper extremity injuries

Patient Group

Group IA

Group C

Group IS

p-values

# of patients

22

31

5

 

Brooker grade I

10 (45.5%)

1 (3.2%)

5 (100%)

P = 0.006#

ns+

p < 0.01§

P < 0.001 (I/II vs III/IV)

Brooker grade II

9 (40.9 (%)

5 (16.12%)

–

P < 0.002#

P < 0.001+

n.s.§

Brooker grade III

1 (4.6%)

15 (48.4%)

–

P < 0.002#

P < 0.001+

n.s. (§)

Brooker grade IV

2 (0.1%)

10 (32.3%)

–

 

HO < 1 year post trauma

19

24

5

P = <.002#

ns+

p < 0.01§

HO > 1 year post trauma

2

1

–

n.s.

HO after revision surgery

1

6

–

n.s.

  1. (#) Comparison between combined (group C) and shaft fractures (group IS)
  2. (+) Comparison between isolated articular (group IA) and combined articular and shaft fractures (group C)
  3. (§) Comparison between isolated articular (IA) and shaft fractures (IS)