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Table 4 Comparison of perioperative parameters between isthmic and non-isthmic nonunion subgroups

From: Augmentative antirotational plating provided a significantly higher union rate than exchanging reamed nailing in treatment for femoral shaft aseptic atrophic nonunion - retrospective cohort study

ParameterAAPERNP value
Isthmic nonunion
No. of patients1350 
 Union11330.19
 Nonunion217
Union time, mean ± SD, mo8.27 ± 4.8210.33 ± 5.270.26
Operating time, mean ± SD, min117.5 ± 35.94164.84 ± 62.980.015
Intraoperative blood loss, mean ± SD, mL288.46 ± 267.05237 ± 246.160.51
Non-isthmic nonunion
No. of patients1320 
 Union12120.04
 Nonunion18
Union time, mean ± SD, mo6.92 ± 2.819.17 ± 5.800.24
Operating time, mean ± SD, min139.25 ± 40.32181.05 ± 71.700.075
Intraoperative blood loss, mean ± SD, mL211.00 ± 134.09270.00 ± 206.730.37
  1. AAP augmentative antirotational plating, ERN exchanging reamed nailing