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. Author manuscript; available in PMC: 2024 Apr 1.
Published in final edited form as: Arthritis Rheumatol. 2023 Jan 30;75(4):567–573. doi: 10.1002/art.42375

Table 2.

Age-adjusted average annual incidence (1976–2018) and point prevalence (1985, 1995, 2005, 2015) rates of lupus nephritis (LN), Olmsted County, MN (1976–2009) and eight-county region (2010-2018) in southeast Minnesota

Age-adjusted average annual LN incidence rates/
100,000 population (95% CI)* 		Age-adjusted LN Point Prevalence/
100,000 population (95% CI)*
1976-1989 1990-1999 2000-2009 2010-2018 1976-2018 01/01/1985 01/01/1995 01/01/2005 01/01/2015
Females 1.2
(0.4, 2.0)		 1.3
(0.4, 2.2)		 1.7
(0.7, 2.7)		 1.7
(1.0, 2.4)		 1.5
(1.1, 1.9)		 25.9
(11.4, 40.5)		 30.7
(16.7, 44.7)		 36.5
(22.4, 50.7)		 33.4
(24.7, 42.1)
Males 0.2
(0.0, 0.6)		 0.0
(0.0, 0.0)		 0.6
(0.0, 1.2)		 0.8
(0.4, 1.3)		 0.5
(0.3, 0.8)		 7.1
(0.0, 15.1)		 6.0
(0.0, 13.0)		 1.4
(0.0, 4.3)		 8.6
(4.1, 13.0)
Overall 0.7
(0.2, 1.2)		 0.6
(0.2, 1.1)		 1.2
(0.6, 1.8)		 1.3
(0.9, 1.7)		 1.0
(0.8, 1.3)		 16.8
(8.3, 25.3)		 18.5
(10.7, 26.4)		 19.4
(12.1, 26.8)		 21.2
(16.3, 26.2)
*

Rates for females and males were age-adjusted to the 2000 projected US population using eight age categories. Overall rates were age- and sex-adjusted to the 2000 projected US population. Rates are per 100,000 population. Denominator data are based on the Rochester Epidemiology Project census (see reference in the text).