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Table 1 Baseline characteristics of the study population according to TyG index quartiles

From: The triglyceride-glucose index predicts ischemic heart disease risk in Koreans: a prospective study using National Health Insurance Service data

Variables

Total

n = 16,456

Quartile of TyG index

P value*

Post hoc

Q1

n = 4140

Q2

n = 4119

Q3

n = 4096

Q4

n = 4100

TyG index

8.49 ± 0.56

≤ 8.08

8.09–8.45

8.46–8.85

≥ 8.86

-

-

Age (years)

46.1 ± 9.5

44.0 ± 8.9

46.0 ± 9.5

47.5 ± 9.7

46.8 ± 9.4

< 0.001

a,b,c,d,e,f

Male sex (%)

51.2

27.7

43.3

58.4

75.8

< 0.001

-

Body mass index (kg/m2)

23.4 ± 3.0

21.6 ± 2.5

22.7 ± 2.7

23.9 ± 2.8

25.2 ± 2.8

< 0.001

a,b,c,d,e,f

Systolic BP (mmHg)

121.9 ± 15.5

115.0 ± 13.9

119.8 ± 14.8

124.1 ± 14.9

128.8 ± 14.8

< 0.001

a,b,c,d,e,f

Diastolic BP (mmHg)

76.2 ± 10.1

71.5 ± 9.1

74.7 ± 9.5

77.7 ± 9.6

80.9 ± 9.7

< 0.001

a,b,c,d,e,f

Mean BP (mmHg)

91.5 ± 11.5

86.0 ± 10.3

89.8 ± 10.9

93.2 ± 11.0

96.9 ± 11.0

< 0.001

a,b,c,d,e,f

FPG (mg/dl)

91.4 ± 9.8

85.8 ± 7.8

90.2 ± 8.3

92.9 ± 9.1

96.8 ± 10.3

< 0.001

a,b,c,d,e,f

Total cholesterol (mg/dL)

190.3 ± 33.3

175.7 ± 29.6

185.6 ± 29.7

195.5 ± 32.1

204.4 ± 34.4

< 0.001

a,b,c,d,e,f

Triglyceride (mg/dL)

124.2 ± 84.9

58.9 ± 10.7

87.3 ± 11.6

123.5 ± 17.9

227.9 ± 109.2

< 0.001

a,b,c,d,e,f

HDL-cholesterol (mg/dL)

53.2 ± 12.6

61.3 ± 12.4

55.8 ± 11.9

50.7 ± 10.7

45.1 ± 9.2

< 0.001

a,b,c,d,e,f

hsCRP (mg/L)

1.0 ± 1.3

0.7 ± 1.2

0.9 ± 1.3

1.2 ± 1.4

1.3 ± 1.4

< 0.001

a,b,c,d,e,f

Current smoker (%)

24.7

11.2

19.3

27.1

41.1

< 0.001

-

Alcohol drinking (%)

43.3

35.2

39.2

44.6

54.3

< 0.001

-

Regular exercise (%)

30.9

33.4

32.7

31.2

26.3

< 0.001

-

Hypertension (%)

20.3

9.1

15.5

23.4

33.5

< 0.001

-

Chronic kidney disease (%)

1.9

1.5

1.7

2.2

2.3

0.011

-

  1. BP blood pressure, FPG fasting plasma glucose, HDL high-density lipoprotein, hsCRP high-sensitivity C-reactive protein
  2. *P values were calculated using one-way ANOVA test or Pearson’s chi-square test
  3. Post hoc analysis with Bonferroni method: a, Q1 versus Q2; b, Q1 versus Q3; c, Q1 versus Q4; d, Q2 versus Q3; e, Q2 versus Q4; and f, Q3 versus Q4