Arthroplasty

Table 2 Surgeon Demographics for Complication Rate above Mean

From: Which surgeon demographic factors influence postoperative complication rates after total knee arthroplasty at U.S. News and World Report top-ranked orthopedic hospitals?

Variable	Complication Rate				P Value^a
	≤ 2.2%		> 2.2%
	n	%	n	%
Number of Surgeons	365		295
Hospital Region
East	127	34.8	92	31.2	0.607
Midwest	105	28.8	93	31.5
South	63	17.3	46	15.6
West	70	19.2	64	21.7
Teaching Hospital
Yes	365	100.0	295	100.0	-
No	0	0.0	0	0.0
Gender
Female	6	1.6	5	1.7	0.959
Male	359	98.4	290	98.3
Physician Type
MD	359	98.4	284	96.3	0.093
DO	6	1.6	11	3.7
Age Cohorts (Years)
≤ 42	81	22.2	76	25.8	0.263
43–50	106	29.0	66	22.4
51–57	86	23.6	73	24.7
≥ 58	92	25.2	80	27.1
Surgeon Volume (Cases)
≤ 50	80	21.9	83	28.1	< 0.001
51–100	77	21.1	90	30.5
101–229	95	26.0	70	23.7
230 +	113	31.0	52	17.6
Residency Reputation
Top 10	95	26.0	65	22.0	0.234
> 10	270	74.0	230	78.0
Fellowship Trained
No	150	41.1	138	46.8	0.143
Yes	215	58.9	157	53.2
Years in Practice Cohorts
≤ 10	86	23.6	80	27.1	0.094
11–20	129	35.3	81	27.5
21 +	150	41.1	134	45.4

^aPearson Chi Square Test

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