Two-Stage Revision TKA Is Associated with High Complication and Failure Rates

Table 5

Risk factors for failure: patient characteristics and surgical factors.

	Fraction with failure, (%)	RR	95% CI	value
Sex		1.15	0.56–2.35	0.707
Male	13/34 (38%)
Female	8/24 (33%)
ASA 3		0.96	0.45–2.08	0.927
Yes	6/17 (35%)
No	15/41 (37%)
Obese (>30 kg/m^2)		0.89	0.41–1.92	0.761
Yes	10/29 (34%)
No	7/18 (39%)
Smoker		0.77	0.22–2.72	0.684
Yes	2/7 (29%)
No	13/35 (37%)
Soft tissue coverage (flap)		2.67	1.51–4.70	0.001
Yes	7/9 (78%)
No	14/48 (29%)
Spacer type		1.22	0.59–2.57	0.584
Block/all; Cement mold	6/14 (43%)
Articulating	15/43 (35%)
≥4 surgeries between primary TKA and stage I		2.25	1.13–4.47	0.020
Yes	3/4 (75%)
No	17/54 (33%)
Type of infection		1.01	0.68–1.50	0.974
Early	6/18 (33%)
Delayed	6/14 (43%)
Late	9/26 (26%)