Determining the effective timing of an open arthrolysis for post-traumatic elbow stiffness: a retrospective cohort study

Table 4 The distribution of postoperative complications

Characteristics	ER	MR	LR	P value
No. of patients	31	78	24
Nerve complications^a	3 (10)	5 (6)	4 (17)	.308
Ulnar nerve	3 (10)	5 (6)	4 (17)
Radial nerve	0 (0)	0 (0)	0 (0)
Median nerve	0 (0)	0 (0)	0 (0)
Recurrent heterotopic ossification	0 (0)	3 (4)	2 (8)	.275
Elbow instability	0 (0)	0 (0)	1 (4)	.103
Wound infection	0 (0)	2 (3)	1 (4)	.566
Pin-related complications	3 (10)	2 (3)	2 (8)	.249
Others^b	1 (3)	3 (4)	1 (4)	.982

ER early release group, MR median release group, LR late release group
^anew-onset or exacerbation of nerve symptoms postoperatively
^bincluding refracture, hematoma, synovitis, tricep avulsion, incomplete wound healing with a sinus, wound dehiscence and intrarticular bleeding
Categorical variables are presented as number (%)

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