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Table 1 Demographic and socioeconomic characteristics of the participants, NHANES 2007–2012 (n = 7943)

From: Association between vitamin D deficiency and hypothyroidism: results from the National Health and Nutrition Examination Survey (NHANES) 2007–2012

Variables Hypothyroidism
N = 614 (7.7%)
Normal Control
N = 7329 (92.3%)
P value Total
N = 7943
Age, mean years (SE) 51.2 (0.8) 46. 1 (0.3) < 0.001 47.0 (0.3)
Female, % (SE) 76.0% (2.4) 49.4% (0.5) < 0.001 51.5% (0.5)
Race/ethnicity, % (SE)    < 0.001  
Non-Hispanic White 86.8% (2.0) 68.2% (2.4)   69.7% (2.3)
Non-Hispanic Black 3.3% (0.6) 10.8% (1.2)   10.2% (1.1)
Mexican American 4.1% (0.9) 8.5% (1.1)   8.1% (1.0)
Other race 5.8% (1.3) 12.5% (1.2)   12% (1.2)
Education, % (SE)    0.047  
Less than 12 15.2% (2.0) 19.4% (1.1)   19% (1.0)
12 22.9% (2.0) 23.5% (0.8)   23.5% (0.8)
More than 12 62.0% (3.0) 57.1% (1.5)   57.5% (1.5)
FPIR, % (SE)    < 0.001  
< 1 (Lowest income) 7.9% (1.4) 14.9% (0.9)   14.3% (0.9)
1 to < 2 21.6% (1.7) 20.7% (0.9)   20.7% (0.9)
2 to < 4 31.7% (2.3) 27.2% (1.0)   27.5% (1.0)
≥4 (Highest income) 38.7% (3.0) 37.3% (1.5)   37.4% (1.5)
Health insurance, % (SE) 92.6% (1.1) 79.8% (0.8) < 0.001 80.8% (0.8)
Physical activity, % (SE) 47.5% (3.7) 59% (0.8) 0.001 58.1% (0.9)
Smoking, % (SE)    0.002  
Current 13.3% (1.7) 21.8% (0.9)   21.1% (0.8)
Former 2.9% (1.1) 2.9% (0.3)   2.9% (0.3)
Never 83.6% (1.8) 75.1% (0.9)   75.8% (0.8)
Alcohol use, % (SE)     
Never 13.9% (1.8) 9.8% (0.6) 0.010 10.1% (0.5)
Former 12% (1.3) 11.7% (0.6)   11.8% (0.5)
Current 74.1% (2.1) 78.5% (0.8)   78.1% (0.8)