Erratum to: Universal Health Coverage in Massachusetts Did Not Change the Trajectory of Arthroplasty Use or Costs

Erratum to: Clin Orthop Relat Res (2016) 474:1090–1098 DOI 10.1007/s11999-015-4643-9

Our study, “Universal Health Coverage in Massachusetts Did Not Change the Trajectory of Arthroplasty Use or Costs” published in Clinical Orthopaedics and Related Research ^® is an analysis of the State Inpatient Database (SID), a restricted-access, publicly available dataset that is maintained by the Agency for Healthcare Research and Quality (AHRQ). One of the provisions of the SID Data Use Agreement (DUA), which we signed when purchasing the data, is that no data observation involving less than or equal to 10 observations is to be published. This measure was put in place by AHRQ to protect individual patients’ privacy and to prevent the potential disclosure of personal information. In our manuscript, there are some tabulated cells in Table 1 that are in violation of this provision. This represents an oversight on my part and an inadvertent failure to comply with the DUA. For this, we apologize. We have provided a revised Table 1.

Table 1.

THAs and TKAs reimbursed by payer

Payer category	Primary payer	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011	Total
Other	Commonwealth care	*	*	*	*	*	73	183	229	266	343	1095
	Health safety net (2009+)	*	*	*	*	*	*	*	13	41	38	92
	Other government payment	47	66	91	86	82	90	83	92	97	93	827
	Other nonmanaged care plan	18	17	11	15	18	*	34	*	*	*	123
	Worker compensation plan	133	123	150	162	170	192	212	211	215	215	1783
No charge	Free care	69	84	81	91	109	56	37	25	*	*	559
Self-pay	Self-pay	16	20	16	22	13	21	21	*	19	14	169
Private	Auto insurance plan	*	*	*	*	*	*	*	*	*	*	35
	Blue Cross	509	604	696	703	764	853	828	822	856	851	7486
	Blue Cross, managed care	1417	1632	1995	2337	2701	2909	2978	3391	3403	3345	26,108
	Commercial	429	480	518	580	600	649	679	662	726	845	6168
	Commercial, managed care	169	181	220	223	267	239	280	311	347	441	2678
	Exclusive provider plan	*	*	*	*	12	24	*	12	12	*	90
	Health maintenance organization	1750	1957	2033	2114	2131	2312	2457	2787	3123	3428	24,092
	Other preferred provider organization and managed care	294	329	360	346	337	389	476	453	395	403	3782
	Point of service plan	*	23	58	37	62	53	49	65	100	71	521
Medicaid	Medicaid	319	338	371	369	407	444	445	501	529	497	4220
	Medicaid, managed care	93	115	150	205	221	281	348	372	386	463	2634
Medicare	Medicare	5959	7062	7692	7865	8134	8387	8439	8560	9165	9468	80,731
	Medicare, managed care	1978	1724	1655	1808	1827	1894	2102	2211	2453	2138	19,790
Unknown	Missing/unknown	*	*	*	*	*	*	*	*	*	*	13
Total		13,207	14,765	16,105	16,972	17,858	18,876	19,665	20,733	22,143	22,672	182,996

* < 10 Patients.

While I am fully confident that nothing in our paper could be used to identify individuals or their personal information, the fact remains that the disclosures are in violation of the AHRQ guidelines. We have therefore asked the editors of Clinical Orthopaedics and Related Research ^® to post an erratum that is in compliance with the AHRQ guidelines, and request that, going forward, authors cite the corrected version of our manuscript.