Association between Serum Uric Acid Levels and Sleep Variables: Results from the National Health and Nutrition Survey 2005–2008

Table 1

Descriptive characteristics of the study population by categories of additive composite score^*.

Characteristics	Additive composite score				𝑃-value
	0	1	2	≥3
Number at risk	2595	2591	1041	264
Women (%)	59.3	46.6	39.2	39.5	<0.0001
Age (years)	43.4±0.5	45.9±0.6	46.0±0.5	43.6±0.9	<0.0001
Race/Ethnicity (%)
Non-Hispanic whites	74.2	72.0	71.8	65.8	0.0476
Non-Hispanic blacks	8.8	9.9	12.3	16.5	<0.0001
Mexican Americans	7.6	8.9	7.2	4.6	0.2126
Others	9.4	9.3	8.8	13.1	0.6188
Education categories (%)
Below high school	15.3	17.1	19.3	22.8	0.0003
High school	21.3	25.8	27.8	32.9	<0.0001
Above high school	63.4	57.1	52.9	44.3	<0.0001
Smoking (%)
Never smoker	58.6	50.9	45.4	38.0	<0.0001
Former smoker	23.4	23.2	25.2	23.6	0.5163
Current smoker	17.9	25.9	29.3	38.5	<0.0001
Alcohol intake, current drinker (%)	74.4	75.3	74.8	62.2	0.0597
Moderate physical activity (%)	58.8	51.9	46.0	44.0	<0.0001
Body mass index (%)
Normal weight	45.4	27.3	18.4	17.8	<0.0001
Overweight	33.1	36.0	32.5	26.8	0.4777
Obese	21.5	36.7	49.1	55.4	<0.0001
Depression (%)	3.6	4.1	9.9	13.4	<0.0001
Diabetes (%)	5.9	10.0	12.9	15.6	<0.0001
Total cholesterol (mg/dL)	197.9±0.9	201.3±1.0	202.5±1.7	203.3±3.5	0.0125
Uric acid (mg/dL)	5.2±0.04	5.5±0.03	5.7±0.1	6.0±0.1	<0.0001

^*Data presented are weighted row percentages or mean values ± standard error (SE).