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Table 1 General characteristics of participants in NHANES 2003–2006 and 2017–2018

From: Association between fat-soluble vitamins and metabolic syndromes in US adults: a cross-section study from NHANES database

Variables

Non-MetS (n = 11 575)

MetS (n = 2 400)

P

Age*, years, n (%)

  

< 0.0001

 20–39

4386 (37.89)

366 (15.25)

 

 40–59

3429 (29.62)

806 (33.58)

 

 ≥ 60

3760 (32.48)

1228 (51.17)

 

Sex*, n (%)

  

0.0508

 Men

5619 (48.54)

1112 (46.33)

 

 Women

5956 (51.46)

1288 (53.67)

 

Race*, n (%)

  

< 0.0001

 Mexican American

2005 (17.32)

489 (20.38)

 

 Other Hispanic

607 (5.24)

143 (5.96)

 

 Non-Hispanic White

5270 (45.53)

1146 (47.75)

 

 Non-Hispanic Black

2582 (22.31)

416 (17.33)

 

 Others

1111 (9.60)

206 (8.58)

 

Education*, n (%)

  

< 0.0001

 Under high school

2792 (24.16)

758 (31.61)

 

 High school or equivalent

2771 (23.98)

606 (25.27)

 

 Above high school

5991 (51.85)

1034 (43.12)

 

Marital status*, n (%)

  

< 0.0001

 Married/cohabiting

7048 (60.94)

1456 (60.69)

 

 Widowed/divorced/separated

2461 (21.28)

687 (28.64)

 

 Never married

2056 (17.78)

256 (10.67)

 

BMI*, kg/m2, n (%)

  

< 0.0001

 < 18.5

209 (1.84)

2 (0.08)

 

 18.5–24.9

3613 (31.81)

157 (6.60)

 

 25.0–29.9

3978 (35.02)

686 (28.84)

 

 ≥ 30.0

3559 (31.33)

1534 (64.48)

 

Physical activity*, n (%)

  

< 0.0001

 Sedentary

2065 (24.03)

604 (35.20)

 

 Insufficient

3054 (35.54)

621 (36.19)

 

 Moderate

1258 (14.64)

242 (14.10)

 

 High

2216 (25.79)

249 (14.51)

 

Drinking status*, n (%)

  

< 0.0001

 Never

1309 (22.51)

338 (23.47)

 

 Ever

1397 (24.03)

433 (30.07)

 

 Current

3108 (53.46)

669 (46.46)

 

Smoking status*, n (%)

  

< 0.0001

 Never

6297 (54.44)

1195 (49.81)

 

 Ever

2829 (24.46)

748 (31.18)

 

 Current

2441 (21.10)

456 (19.01)

 

Family PIR*, median (IQR)

2.29 (1.22, 4.22)

2.02 (1.16, 3.71)

< 0.0001

 Total total energy#, kcal/day, median (IQR)

1953.00 (1473.00, 2552.00)

1815.50 (1373.50, 2376.50)

< 0.0001

 Vitamin A#, μmol/L, median (IQR)

1.88 (1.54, 2.27)

1.99 (1.63, 2.41)

< 0.0001

 Vitamin E#, μmol /L, median (IQR)

26.47 (21.50, 33.44)

29.49 (23.92, 38.08)

< 0.0001

 Vitamin D#, nmol/L, median (IQR)

59.20 (43.40, 76.20)

55.90 (40.90, 72.90)

< 0.0001

  1. Physical activity was categorized into four groups based on metabolic equivalent (MET)-minutes per week: sedentary (MET = 0), insufficient (0 < MET < 500), moderate (500 ≤ MET < 1000), and high (MET ≥ 1000). But no participant was categorized into “sedentary” group
  2. NHANES the National Health and Nutrition Examination Survey, BMI Body mass index, Family PIR ratio of family income to poverty, IQR Interquartile range, MetS Metabolic syndromes
  3. *P values were calculated using t-test
  4. #P values were calculated using Wilcoxon rank-sum test