Arthritis Research & Therapy

Table 3 Number of deaths (No) and age-adjusted mortality rate (death per 1 million people)) of dermatomyositis and polymyositis according to underlying cause of death (UCD) and multiple causes of death (MCD) in the USA from 1981–1982 to 2019–2020, females

From: Long-term secular trends in dermatomyositis and polymyositis mortality in the USA from 1981 to 2020 according to underlying and multiple cause of death mortality data

	Dermatomyositis								Polymyositis
	UCD			MCD					UCD			MCD
Year	No	Rate		No	Rate		U/M		No	Rate		No	Rate		U/M
1981–2020	2654	0.42		5562	0.87		0.48		4472	0.69		9554	1.46		0.47
1981–1982	140	0.59		286	1.20		0.50		210	0.88		450	1.91		0.46
1983–1984	122	0.50		258	1.06		0.47		212	0.86		482	1.97		0.44
1985–1986	117	0.46		250	1.00		0.46		218	0.87		514	2.04		0.43
1987–1988	123	0.47		260	1.00		0.47		254	0.97		592	2.26		0.43
1989–1990	112	0.43		252	0.96		0.45		290	1.08		590	2.19		0.50
1991–1992	121	0.43		256	0.93		0.46		255	0.92		608	2.17		0.42
1993–1994	129	0.46		299	1.04		0.44		269	0.94		588	2.02		0.46
1995–1996	118	0.40		278	0.93		0.42		237	0.79		588	1.95		0.41
1997–1998	131	0.44		268	0.89		0.49		260	0.85		539	1.74		0.49
1999–2000	151	0.48		312	1.00		0.48		274	0.87		573	1.80		0.48
2001–2002	130	0.41		291	0.91		0.45		245	0.75		494	1.51		0.50
2003–2004	162	0.50		318	0.97		0.51		254	0.76		509	1.52		0.50
2005–2006	152	0.45		307	0.91		0.50		265	0.78		511	1.49		0.52
2007–2009	137	0.40		269	0.77		0.52		203	0.58		422	1.19		0.48
2009–2010	136	0.38		268	0.75		0.51		194	0.53		394	1.08		0.50
2011–2012	132	0.36		276	0.74		0.48		181	0.48		384	1.01		0.47
2013–2014	149	0.40		264	0.69		0.57		183	0.46		358	0.90		0.51
2015–2016	141	0.37		272	0.70		0.52		167	0.42		333	0.83		0.50
2017–2018	122	0.31		279	0.70		0.45		145	0.34		283	0.66		0.52
2019–2020	129	0.31		299	0.71		0.44		156	0.36		342	0.77		0.46

Using age structure of year 2000 in the USA as standard population for adjustment

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