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Table 1 Baseline characteristics of the subjects

From: High dietary intake of unsaturated fatty acids is associated with improved insulin resistance – a cross-sectional study based on the NHANES database

Variables

Total (n = 7630)

UFA/TF ratio Q1

(n = 2541)

UFA/TF ratio

Q2

(n = 2546)

UFA/TF ratio Q3

(n = 2543)

P value

Gender, n (%)

    

0.030

Male

3745 (49.1)

1280 (50.4)

1271 (49.9)

1194 (47)

 

Female

3885 (50.9)

1261 (49.6)

1275 (50.1)

1349 (53)

 

Age

50.95 ± 17.34

50.3 ± 17.83

50.39 ± 17.20

52.11 ± 16.93

< 0.001

Race, n (%)

    

< 0.001

Mexican American

877 (11.5)

311 (12.2)

305 (12)

261 (10.3)

 

Other Hispanic

772 (10.1)

276 (10.9)

265 (10.4)

231 (9.1)

 

Non-Hispanic white

2737 (35.9)

1126 (44.3)

887 (34.8)

724 (28.5)

 

Non-Hispanic black

2046 (26.8)

501 (19.7)

707 (27.8)

838 (33)

 

Other Race

(Including multi-racial)

1198 (15.7)

327 (12.9)

382 (15)

489 (19.2)

 

BMI

30.12 ± 7.58

30.02 ± 7.37

30.51 ± 7.73

29.83 ± 7.62

0.005

WHtR

0.61 ± 0.10

0.61 ± 0.10

0.61 ± 0.11

0.60 ± 0.10

0.015

Energy (kcal)

2039.14 ± 865.06

2057.55 ± 902.47

2097.96 ± 864.36

1961.85 ± 821.14

< 0.001

Carbohydrate (g)

438.78 ± 217.54

445.07 ± 231.67

458.22 ± 218.86

413.03 ± 198.41

< 0.001

Sugars (g)

187.42 ± 124.88

202.23 ± 138.97

194.81 ± 123.70

165.21 ± 106.86

< 0.001

Dietary fiber (g)

30.17 ± 18.18

27.39 ± 16.51

30.47 ± 17.21

32.66 ± 20.22

< 0.001

Protein (g)

144.62 ± 70.84

145.31 ± 73.02

152.16 ± 71.12

136.38 ± 67.41

< 0.001

Total fat (g)

154.70 ± 82.10

151.43 ± 82.33

161.90 ± 81.58

150.76 ± 81.93

< 0.001

Total saturated fatty acids (g)

49.34 ± 28.90

58.14 ± 33.09

51.30 ± 26.81

38.59 ± 22.25

< 0.001

Total unsaturated fatty acids (g)

89.83 ± 49.12

76.41 ± 42.29

94.30 ± 47.62

98.76 ± 53.90

< 0.001

Insulin (µU/mL)

14.98 ± 24.22

15.54 ± 23.55

15.82 ± 27.84

13.55 ± 20.61

0.047

Fasting glucose (mmol/L)

6.31 ± 2.12

6.33 ± 2.26

6.34 ± 2.13

6.26 ± 1.95

0.545

Triglyceride (mmol/L)

1.24 ± 1.09

1.30 ± 1.24

1.28 ± 0.96

1.15 ± 1.05

0.001

Total cholesterol (mmol/L)

4.80 ± 1.05

4.82 ± 1.05

4.80 ± 1.05

4.78 ± 1.06

0.348

HDL cholesterol (mmol/L)

1.38 ± 0.42

1.36 ± 0.41

1.36 ± 0.40

1.42 ± 0.43

< 0.001

LDL cholesterol (mmol/L)

2.83 ± 0.92

2.86 ± 0.95

2.87 ± 0.89

2.76 ± 0.93

0.012

Current smoking, n (%)

    

< 0.001

No

1849 (57.0)

631 (53.7)

589 (55)

629 (63)

 

Yes

1396 (43.0)

545 (46.3)

482 (45)

369 (37)

 

Alcohol drinking, n (%)

    

0.439

No

658 (8.9)

204 (8.3)

230 (9.3)

224 (9.1)

 

Yes

6761 (91.1)

2260 (91.7)

2254 (90.7)

2247 (90.9)

 

Diabetes, n (%)

    

0.064

No

6441 (84.4)

2176 (85.7)

2147 (84.4)

2118 (83.3)

 

Yes

1187 (15.6)

364 (14.3)

398 (15.6)

425 (16.7)

 

Hypercholesteremia, n (%)

    

0.592

No

4820 (63.6)

1619 (64.2)

1614 (63.8)

1587 (62.9)

 

Yes

2756 (36.4)

903 (35.8)

915 (36.2)

938 (37.1)

 

Coronary artery disease, n (%)

   

0.375

No

7264 (95.50)

2406 (95.14)

2435 (95.94)

2423 (95.43)

 

Yes

342 (4.50)

123 (4.86)

103 (4.06)

116 (4.57)

 

Stroke, n (%)

    

0.812

No

7223 (94.83)

2399 (94.64)

2412 (94.81)

2412 (95.04)

 

Yes

394 (5.17)

136 (5.36)

132 (5.19)

126 (4.96)

 

HOMA-IR, median (IQR)

2.66 (1.56, 4.80)

2.78 (1.63, 4.89)

2.75 (1.63, 5.03)

2.42(1.46, 4.47)

0.002

TyG index

8.68 ± 0.64

8.72 ± 0.65

8.72 ± 0.64

8.61 ± 0.62

< 0.001