Related demographic characteristics of participants included in NHANES from 2009 to 2010 and 2013 to 2014 and 2017–2020.

Means with standard deviation (SD) were used for continuous characteristic variables and categorical variables were expressed as frequencies. Differences in categorical variables between exposed groups were analyzed by Kruskal Wallis test or Mann Whitney test. Spearman correlation analysis was used to analyze the differences of continuous variables between groups.
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