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Table 1 Baseline characteristics of each group by age

From: Relationship between uric acid and blood pressure in different age groups

Variable

Total ( n  = 45,098)

<40 years ( n  = 28,864)

40–59 years ( n  = 13,118)

≥60 years ( n  = 3,116)

p value

Male

24,031 (53.3)

15,212 (52.7)

7,089 (54.0)

1,730 (55.5)

<0.001

Age (years)

39.0 ± 11.6

31.7 ± 4.9

48.7 ± 5.5

65.0 ± 4.2

<0.001

Height (cm)

165.6 ± 8.7

167.2 ± 8.5

163.5 ± 8.3

160.0 ± 8.6

<0.001

Weight (kg)

63.9 ± 12.6

64.3 ± 13.7

63.7 ± 10.2

60.5 ± 9.5

<0.001

Body mass index (kg/m2)

23.2 ± 3.4

22.9 ± 3.7

23.7 ± 2.8

23.6 ± 2.9

<0.001

Systolic blood pressure (mmHg)

117.1 ± 13.9

114.7 ± 12.8

120.2 ± 14.2

126.6 ± 15.3

<0.001

Diastolic blood pressure (mmHg)

72.3 ± 9.5

70.8 ± 8.9

74.8 ± 9.9

76.3 ± 9.7

<0.001

Uric acid (mg/dL)

5.2 ± 1.5

5.3 ± 1.5

5.1 ± 1.4*

5.1 ± 1.3*

<0.001

Fasting blood sugar (mg/dL)

91.3 ± 17.7

89.3 ± 14.6

94.4 ± 20.1

96.6 ± 21.4

<0.001

Estimated glomerular filtration rate (mL/min/1.73 m2)

88.0 ± 27.1

91.2 ± 28.0

83.1 ± 24.6

78.4 ± 23.4

<0.001

Total cholesterol (mg/dL)

180.2 ± 33.8

174.2 ± 31.3

189.9 ± 33.7

194.4 ± 34.4

<0.001

High-density lipoprotein (mg/dL)

52.0 ± 10.2

52.1 ± 10.0*

51.8 ± 10.4†

52.0 ± 10.4*,†

0.046

Triglyceride (mg/dL)

105.6 ± 82.5

100.1 ± 62.2

115.4 ± 67.0

115.3 ± 60.0

<0.001

Low density lipoprotein (mg/dL)

107.1 ± 29.3

102.3 ± 27.2

115.0 ± 30.7

117.3 ± 31.2

<0.001

Hypertension

3,122 (6.9)

1,144 (3.9)

1,377 (10.5)

601 (19.3)

<0.001

Diabetes mellitus

1,224 (2.7)

344 (1.2)

625 (4.8)

255 (8.2)

<0.001

Dyslipidemia

10,073 (22.3)

5,330 (18.5)

3,752 (28.6)

991 (31.8)

<0.001

Hyperuricemia

5,700 (12.6)

4,104 (14.2)

1,296 (9.9)

300 (9.6)

<0.001

  1. Values are presented as number (%) or mean ± standard deviation.
  2. All p values in the post hoc analysis comparing each group in all the variables were under 0.05 except the groups indicated as same letters like * or †.