TABLE II.

Estimated Number of Individuals Who Had Both Total Hip and Total Knee Replacement Among the Total U.S. Population in 2010^*

		Olmsted County, Minnesota					United States
	Age Group (yr)	No. with Either THR or TKR	No.with Both THR and TKR	County Population	% Prevalent Cases with Both Procedures (A)	Prevalence of Both in Olmsted County (B)	Estimated No. with Either THR or TKR	Total 2010 U.S. Population	Estimated No. with Both Procedures (Assuming Prevalence from A)†	Estimated No. (Assuming Prevalence from B)†
Female	<50	156	12	48,814	7.69%	0.02%	188,850	103,577,271	14,527	25,463
	50-59	334	21	9,707	6.29%	0.22%	556,055	21,559,563	34,962	46,642
	60-69	577	54	6,048	9.36%	0.89%	1,169,996	15,427,351	109,497	137,744
	70-79	554	50	3,834	9.03%	1.30%	1,323,605	9,178,735	119,459	119,702
	80+	304	36	3,247	11.84%	1.11%	1,179,530	7,126,835	139,681	79,016
	All age groups	1,925	173	71,650	8.99%	0.24%	4,418,036	156,869,755	418,126	408,567
Male	<50	128	9	48,961	7.03%	0.02%	207,596	105,709,894	14,597	19,432
	50-59	225	10	9,153	4.44%	0.11%	451,930	20,512,532	20,086	22,411
	60-69	350	27	5,432	7.71%	0.50%	806,113	14,029,131	62,186	69,732
	70-79	350	27	3,236	7.71%	0.83%	821,421	7,447,964	63,367	62,143
	80+	123	16	1,826	13.01%	0.88%	548,340	4,101,693	71,329	35,940
	All age groups	1,176	89	68,608	7.57%	0.13%	2,835,400	151,801,214	231,565	209,658
Total		3,101	262	140,258	8.45%	0.19%	7,253,436	308,670,969	649,691	618,225

^*Estimated based on Olmsted County data and published literature²⁷. THR = total hip replacement, and TKR = total knee replacement.

^†Estimated numbers differ from the product of table columns because of rounding.