Arthroplasty

Table 3 Surgeon Demographics for Elevated Complication Rate (> 1 STD 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
	< 2.7%		≥ 2.7%
	n	%	n	%
Number of Surgeons	554		106
Hospital Region
East	182	32.9	37	34.9	0.696
Midwest	164	29.6	34	32.1
South	91	16.4	18	17.0
West	117	21.1	17	16.0
Teaching Hospital
Yes	554	100.0	106	100.0	-
No	0	0.0	0	0.0
Gender
Female	10	1.8	1	0.9	0.704
Male	544	98.2	105	99.1
Physician Type
MD	541	97.7	102	96.2	0.498
DO	13	2.3	4	3.8
Age Cohorts (Years)
≤ 42	129	23.3	28	26.4	0.031
43–50	156	28.2	16	15.1
51–57	126	22.7	33	31.1
≥ 58	143	25.8	29	27.4
Surgeon Volume (Cases)
≤ 50	138	24.9	25	23.6	0.234
51–100	133	24.0	34	32.1
101–229	138	24.9	27	25.5
230 +	145	26.2	20	18.9
Residency Reputation
Top 10	136	24.5	24	22.6	0.675
> 10	418	75.5	82	77.4
Fellowship Trained
No	239	43.1	49	46.2	0.557
Yes	315	56.9	57	53.8
Years in Practice Cohorts
≤ 10	137	24.7	29	27.4	0.135
11–20	185	33.4	25	23.6
21 +	232	41.9	52	49.1

^aPearson Chi Square Test

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