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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)