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

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

Parameter	AAP	ERN	P value
Isthmic nonunion
No. of patients	13	50
Union	11	33	0.19
Nonunion	2	17	0.19
Union time, mean ± SD, mo	8.27 ± 4.82	10.33 ± 5.27	0.26
Operating time, mean ± SD, min	117.5 ± 35.94	164.84 ± 62.98	0.015
Intraoperative blood loss, mean ± SD, mL	288.46 ± 267.05	237 ± 246.16	0.51
Non-isthmic nonunion
No. of patients	13	20
Union	12	12	0.04
Nonunion	1	8	0.04
Union time, mean ± SD, mo	6.92 ± 2.81	9.17 ± 5.80	0.24
Operating time, mean ± SD, min	139.25 ± 40.32	181.05 ± 71.70	0.075
Intraoperative blood loss, mean ± SD, mL	211.00 ± 134.09	270.00 ± 206.73	0.37

ISSN: 1471-2474