Table 1.

Medicare Patients With TKA, 2005 to 2016, Demographic Profile and Previous Receipt of Bariatric Procedure

Effect	Level	Patients	Bariatric	% Bariatric	Avg. Yeara
	Total	2,701,427	25,852	0.96	1.0
Age	65-69	807,860	15,696	1.94	0.7
	70-74	784,894	7,463	0.95	1.3
	75-79	626,535	2,092	0.33	1.8
	80+	482,138	601	0.12	2.4
Charlson Index	00	1,655,303	14,382	0.87	1.0
	1-2	883,650	9,108	1.03	1.0
	3-4	138,131	1,882	1.36	1.0
	5+	24,343	480	1.97	0.9
Hospital beds	000-149	774,952	7,640	0.99	1.1
	150-249	561,513	5,363	0.96	1.0
	250-449	806,176	7,582	0.94	1.0
	450+	558,786	5,267	0.94	1.0
Hospital ownership	Nonprofit	482,869	4,862	1.01	1.1
	Private	1,919,355	18,084	0.94	0.9
	Public	299,203	2,906	0.97	1.1
Hospital setting	Rural	340,586	2,807	0.82	1.2
	Urban	2,360,841	23,045	0.98	1.0
Hospital stay	1-2	563,624	6,564	1.16	1.0
	3-4	1,854,537	17,409	0.94	1.0
	5+	283,266	1,879	0.66	1.0
Race	Black	130,560	1,535	1.18	1.1
	Oth/unk	101,110	473	0.47	0.9
	White	2,469,757	23,844	0.97	1.0
Resident region	Midwest	765,842	6,714	0.88	1.0
	North East	422,300	3,706	0.88	0.9
	South	1,041,325	10,193	0.98	1.1
	West	471,960	5,239	1.11	0.9
Sex	Female	1,702,202	20,608	1.21	1.0
	Male	999,225	5,244	0.52	1.0
Year	2005	228,780	86	0.04	0.8
	2006	225,663	192	0.09	1.0
	2007	227,345	625	0.27	0.4
	2008	222,121	917	0.41	0.7
	2009	219,604	1,279	0.58	0.8
	2010	227,602	1,718	0.75	1.1
	2011	215,397	2,238	1.04	0.8
	2012	217,304	2,708	1.25	0.9
	2013	225,177	3,317	1.47	1.0
	2014	220,935	3,669	1.66	1.0
	2015	227,095	4,144	1.82	1.1
	2016	244,404	4,959	2.03	1.2

^aAverage time (year) from bariatric procedure to TKA.