Arthritis Research & Therapy

Table 2 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, males

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	1262	0.24		2702	0.52		0.47		2625	0.52		5790	1.15		0.45
1981–1982	68	0.38		135	0.76		0.50		118	0.68		305	1.76		0.39
1983–1984	54	0.30		139	0.78		0.38		130	0.74		314	1.77		0.42
1985–1986	54	0.28		144	0.75		0.37		150	0.84		362	2.00		0.42
1987–1988	54	0.27		144	0.72		0.37		122	0.65		320	1.70		0.38
1989–1990	62	0.30		142	0.69		0.43		152	0.79		356	1.87		0.42
1991–1992	47	0.22		126	0.61		0.37		153	0.75		382	1.89		0.40
1993–1994	57	0.26		124	0.57		0.46		156	0.73		356	1.66		0.44
1995–1996	64	0.29		138	0.62		0.46		147	0.67		330	1.51		0.44
1997–1998	57	0.25		134	0.57		0.43		148	0.63		336	1.47		0.43
1999–2000	62	0.26		121	0.49		0.52		159	0.69		336	1.43		0.48
2001–2002	69	0.27		150	0.59		0.46		134	0.55		284	1.16		0.47
2003–2004	65	0.25		127	0.49		0.51		144	0.58		267	1.07		0.54
2005–2006	61	0.22		110	0.40		0.56		131	0.49		255	0.97		0.51
2007–2009	69	0.24		140	0.49		0.48		123	0.44		226	0.81		0.54
2009–2010	67	0.22		134	0.45		0.50		117	0.41		242	0.84		0.48
2011–2012	82	0.26		142	0.45		0.58		135	0.44		263	0.87		0.51
2013–2014	60	0.18		134	0.41		0.44		125	0.40		239	0.76		0.53
2015–2016	57	0.16		119	0.34		0.47		101	0.30		217	0.65		0.47
2017–2018	68	0.20		125	0.37		0.55		98	0.27		190	0.53		0.51
2019–2020	85	0.24		174	0.47		0.50		82	0.22		210	0.57		0.39

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

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