Table 1 Baseline characteristics of study population across the quartiles of baseline Hct.

From: Higher blood hematocrit predicts hyperuricemia: a prospective study of 62897 person-years of follow-up

 

Quartile of baseline Hct

P*

1 (lowest)

2

3

4 (highest)

Median (range)

35.5 (<37.4)

38.8 (37.4–40.3)

42.0 (40.4–43.7)

45.7 (>43.7)

–

No. of subjects

6908

6936

6899

6797

–

Age (years)

41.92 (13.76)

42.18 (14.47)

43.15 (13.69)

41.07 (11.94)

0.00

Male (%)

8.8

27.1

76.0

98.4

0.00

BMI (kg/m2)

21.83 (2.75)

22.45 (3.03)

23.61 (3.09)

24.56 (3.03)

0.00

WBC (×109/L)

5.79 (1.48)

6.11 (1.50)

6.41 (1.57)

6.77 (1.67)

0.00

Platelet count (×109/L)

193.72 (57.54)

195.22 (51.27)

191.37 (52.13)

193.48 (49.60)

0.00

HDL-cholesterol (mmol/L)

1.53 (0.34)

1.49 (0.35)

1.36 (0.33)

1.27 (0.29)

0.00

LDL-cholesterol (mmol/L)

2.47 (0.75)

2.60 (0.77)

2.66 (0.80)

2.80 (0.84)

0.00

Triglyceride (mmol/L)

0.99 (0.82)

1.13 (0.97)

1.51 (1.49)

1.75 (1.52)

0.00

SCr (μmol/L)

66.97 (21.2)

69.78 (18.92)

81.31 (17.16)

85.88 (13.46)

0.00

ALT (U/L)

17.82 (12.74)

20.31 (14.35)

25.99 (22.15)

32.17 (23.87)

0.00

FBS (mmol/L)

4.98 (0.69)

5.07 (0.88)

5.19 (1.09)

5.23 (1.33)

0.00

SBP (mmHg)

114.76 (16.41)

117.89 (17.23)

122.33 (16.47)

123.80 (15.67)

0.00

DBP (mmHg)

70.88 (10.25)

73.65 (10.63)

77.40 (11.11)

79.80 (11.34)

0.00

  1. Hct, hematocrit; BMI, body mass index; WBC, white blood cell; HDL-cholesterol, high density lipoprotein cholesterol; LDL-cholesterol, low density lipoprotein cholesterol; SCr, serum creatinine; ALT, alanine aminotransferase; FBS, fasting blood glucose; SBP, systolic blood pressure; DBP, diastolic pressure.
  2. Data are mean (Standard Deviation), unless otherwise indicated.
  3. *P values are for test of difference across all quartiles of baseline Hct.
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