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. 2021 Jul 26;10(15):3289.
doi: 10.3390/jcm10153289.

Prevalence Trend and Disparities in Rheumatoid Arthritis among US Adults, 2005-2018

Yingke Xu  1   2 , Qing Wu  1   2
Affiliations

Prevalence Trend and Disparities in Rheumatoid Arthritis among US Adults, 2005-2018

Yingke Xu et al. J Clin Med. .

Abstract

Rheumatoid arthritis (RA) trends among US adults and disparities in RA patients in recent years have not been well described. We aimed to examine the trend of RA prevalence and disparities among US adults. Data from the National Health and Nutrition Examination Survey (NHANES) of the years 2005-2018 were analyzed to examine the self-reported RA prevalence trend. Age-adjusted RA prevalence stratified by race/ethnicity and socioeconomic status (SES), as well as associated linear trends, were calculated for both genders. The multivariable adjustment was used to evaluate the association between race, SES, and RA. During 2005-2018, there was no significant linear trend in the age-adjusted self-reported RA prevalence among men and women, but significant differences among people from different races, educational levels, and family poverty income ratio (PIR) groups were observed. The RA rate difference was significant for both genders and between Non-Hispanic Caucasians and Non-Hispanic African Americans (both p-value ≤ 0.001). Both men and women with a higher educational level and a higher PIR had a lower age-adjusted RA rate. Age-adjusted RA prevalence fluctuated for both men and women during 2005-2018. Non-Hispanic African Americans and people with low SES had significantly higher age-adjusted RA prevalence and RA risk.

Keywords: prevalence; rheumatoid arthritis; socioeconomic status; trend.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Age-adjusted prevalence of rheumatoid arthritis by gender, 2005–2006 through 2017–2018.
Figure 2
Figure 2
Age-adjusted prevalence of rheumatoid arthritis by race in men and women, 2005–2006 through 2017–2018. (a) shows the prevalence of men by race; (b) shows the prevalence of women by race. * includes the “other” race group not shown; ** p-value was based on F-test.
Figure 2
Figure 2
Age-adjusted prevalence of rheumatoid arthritis by race in men and women, 2005–2006 through 2017–2018. (a) shows the prevalence of men by race; (b) shows the prevalence of women by race. * includes the “other” race group not shown; ** p-value was based on F-test.
Figure 3
Figure 3
Age-adjusted prevalence of rheumatoid arthritis by education level in men and women, 2005–2006 through 2017–2018. (a) shows the prevalence of men by education level; (b) shows the prevalence of women by education level. * p-value was based on F-test.
Figure 3
Figure 3
Age-adjusted prevalence of rheumatoid arthritis by education level in men and women, 2005–2006 through 2017–2018. (a) shows the prevalence of men by education level; (b) shows the prevalence of women by education level. * p-value was based on F-test.
Figure 4
Figure 4
Age-adjusted prevalence of rheumatoid arthritis by poverty income ratio level in men and women, 2005–2006 through 2017–2018. (a) shows the prevalence of men by poverty income ratio level; (b) shows the prevalence of women by poverty income ratio level. * p-value was based on F-test.
Figure 4
Figure 4
Age-adjusted prevalence of rheumatoid arthritis by poverty income ratio level in men and women, 2005–2006 through 2017–2018. (a) shows the prevalence of men by poverty income ratio level; (b) shows the prevalence of women by poverty income ratio level. * p-value was based on F-test.
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