Systematic review of dynamization vs exchange nailing for delayed/non-union femoral fractures

Table 3 Fracture information of patients involved throughout studies

	Exchange nailing		Dynamization		EN vs dynam
	Union/total reported	Significant vs total union rate	Union/total reported	Significant vs total union rate	P-values
No. of patients	556/644	-	84/131	-	P < 0.0001
Mechanism of injury
Crush	2/2	NS	0/0	-	-
Gun shot wound	2/2	NS	0/0	-	-
Motorcycle Accident	27/35	NS	0/0	-	-
Pedestrain/bike vs motor vehicle	2/6	P = 0.0045	0/0	-	-
Motor vehicle accident	146/163	NS	14/24	NS	P = 0.0004
Fall	1/5	P = 0.0017	0/0	-	-
Sporting accident	1/1	NS	0/0	-	-
Industrial accident	2/3	NS	0/0	-	-
Non-traumatic	0/0	-	0/0	-	-
Bombing injury	0/0	-	0/0	-	-
Location of injury
Proximal shaft	26/30	NS	2/3	NS	NS
Mid-shaft/isthmal	139/154	NS	32/51	NS	P < 0.0001
Distal shaft	38/43	NS	1/3	NS	NS
Supra-isthmal	10/16	P = 0.0172	1/1	NS	NS
Sub-trochanteric	4/4	NS	2/3	NS	NS
Infra-isthmal	5/9	P = 0.0265	0/0	-	-
Fracture pattern
Oblique	21/21	NS	0/0	NS	-
Segmental	0/0	-	2/5	NS	-
Transverse	14/14	NS	0/0	NS	-
Commimuted	19/21	NS	17/30	NS	P = 0.0219
Open vs closed
Closed	133/162	NS	14/24	NS	P < 0.0001
Opened	25/32	NS	0/0	-	-
I	1/2	NS	0/0	-	-
II	2/4	NS	0/0	-	-
IIIA	1/2	NS	0/0	-	-
IIIB/C	1/1	NS	0/0	-	-
Winquist-Hansen classification
Stable	41/64	P < 0.0001	20/29	NS	NS
O	7/13	P = 0.0054	0/0	-	-
I	18/23	NS	12/17	NS	NS
II	16/27	P = 0.0007	6/9	NS	NS
Unstable	14/23	P = 0.0028	22/36	NS	NS
III	11/17	P = 0.0234	6/9	NS	NS
IV	3/6	P = 0.0387	2/2	NS	NS
V	0/0	-	2/2	NS	-
Presence of fracture graph
Present	0/0	-	29/44	NS	-
No gap	0/0	-	1/1	NS	-

NS: Not significant.