Table 3.

Adverse events. Values are n (%) unless otherwise specified.

Adverse Events	SLE	OA	p
Major events
Acute renal insufficiency	5 (8.6)	0 (0)	0.004
Arrhythmia	1 (1.7)	0 (0)	0.33
Deep vein thrombosis	3 (5.2)	0 (0)	0.036
Falls	6 (10.3)	2 (1.7)	0.017
Postoperative fracture	2 (3.4)	0 (0)	0.11
Dislocation	5 (8.6)	3 (2.6)	0.12
Additional surgery^*	4 (6.9)	0 (0)	0.012
Minor events
Superficial surgical site infection	4 (6.9)	1 (0.9)	0.04
Excessive surgical site drainage	3 (5.2)	1 (0.9)	0.09
Surgical site ecchymosis	0 (0)	2 (1.7)	0.55
Surgical site erythema	3 (5.2)	2 (1.7)	0.33
Spinal headache	2 (3.4)	0 (0)	0.11
Delayed wound healing	0 (0)	2 (1.7)	0.55

↵* Additional surgeries include 3 revisions and 1 repair of fracture resulting from postoperative fall. Significant data are in bold face. SLE: systemic lupus erythematosus; OA: osteoarthritis.