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Table 2 Nonunion characteristics

From: Factors associated with development of re-nonunion after primary revision in femoral shaft nonunion subsequent to failed intramedullary nailing

Nonunion characteristics Number (%) Re-nonunion group 18 (28.6%) Non-renonunion group 45 (71.4%)
Fracture type
 Closed N (%) 10 (55.6%) 24 (53.3%)
 Open N (%) 8 (44.4%) 21 (46.7%)
Type of IMN
 Antegrade N (%) 11 (61.1%) 26 (57.8%)
 Retrograde N (%) 7 (38.9%) 19 (42.2%)
Use of IMN locking screws
 Dynamic N (%) 6 (33.3%) 17 (37.8%)
 Static N (%) 12 (66.7%) 28 (62.2%)
Site of nonunion
 Isthmal N (%) 5 (27.8%) 29 (64.4%)
 Non-isthmal N (%) 13 (72.2%) 16 (35.6%)
Primary nonunion time (years)
 < 1.5 N (%) 10 (55.6%) 25 (55.6%)
 ≥ 1.5 N (%) 8 (44.4%) 20 (44.4%)
Pathological type of nonunion
 Atrophic N (%) 6 (33.3%) 15 (33.3%)
 Hypertrophic N (%) 12 (66.7%) 30 (66.7%)
Bone defect (mm)
 < 5 N (%) 7 (38.9%) 28 (62.2%)
 ≥ 5 N (%) 11 (61.1%) 17 (37.8%)
Primary revision method
 ERN N (%) 16 (88.9%) 17 (37.8%)
 ACP N (%) 2 (11.1%) 28 (62.2%)
Adjuvant ABG procedure
 No N (%) 13 (72.2%) 11 (24.4%)
 Yes N (%) 5 (27.8%) 34 (75.6%)
  1. N total number of nonunions, IMN intramedullary nailing, ERN exchanging reamed nailing, ACP augmentative compression plating, ABG autogenous bone grafting