Table 2 Baseline characteristics of study population across the quartiles of baseline Hct in gender subgroup.

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)

Male subgroup

 Median (range)

39.8(<41.4)

42.5(41.4–43.5)

44.5(43.6–45.5)

46.9(>45.5)

 No. of subjects

3669

3713

3461

3579

 age (years)

48.35(16.25)

43.78(13.3)

42.09(12.42)

40.19(11.47)

0.00

 BMI (kg/m2)

23.68(3)

24.07(2.97)

24.4(2.95)

24.71(3.07)

0.00

 WBC (×109/L)

6.2(1.57)

6.48(1.6)

6.62(1.62)

6.9(1.69)

0.00

 Platelet count (×109/L)

181.02(53.87)

188.37(51.04)

191.67(48.72)

194.29(50.2)

0.00

 HDL-cholesterol (mmol/L)

1.31(0.32)

1.29(0.31)

1.27(0.29)

1.26(0.3)

0.00

 LDL-cholesterol (mmol/L)

2.58(0.8)

2.66(0.83)

2.75(0.83)

2.83(0.85)

0.00

 Triglyceride (mmol/L)

1.51(1.34)

1.68(1.71)

1.7(1.48)

1.8(1.57)

0.00

 SCr (μmol/L)

90.08(26.23)

87.33(13.52)

86.19(13.3)

86.34(12.93)

0.00

 eGFR (ml/min/1.73 m2)

87.62(18.71)

91.28(18.04)

93.34(19.15)

93.7(17.62)

0.00

 ALT (U/L)

25.31(19.79)

28.07(22.69)

30.93(28.51)

33.5(22.57)

0.00

 FBS (mmol/L)

5.25(1.12)

5.21(1.12)

5.21(1.19)

5.24(1.44)

0.00

 SBP (mmHg)

125.43(17.88)

123.38(15.76)

123.59(15.45)

124.08(15.76)

0.00

 DBP (mmHg)

77.17(11.34)

78.31(11.03)

79.17(11.17)

80.39(11.39)

0.00

Female subgroup

 Median (range)

34.3(<35.7)

36.6(35.7–37.5)

38.4(37.6–39.3)

40.5(>39.3)

 No. of subjects

3401

3276

3276

3165

 age (years)

41.07(12.64)

40.38(12.87)

39.65(12.76)

40.33(13.51)

0.00

 BMI (kg/m2)

21.65(2.65)

21.75(2.71)

21.92(2.89)

22.27(3.08)

0.00

 WBC (×109/L)

5.67(1.46)

5.88(1.42)

6.07(1.49)

6.25(1.5)

0.00

 Platelet count (×109/L)

195.86(59.91)

195.86(52.24)

200.14(50.22)

202.8(51.93)

0.00

 HDL-cholesterol (mmol/L)

1.55(0.33)

1.55(0.33)

1.56(0.33)

1.56(0.33)

0.00

 LDL-cholesterol (mmol/L)

2.42(0.73)

2.52(0.76)

2.6(0.75)

2.67(0.78)

0.00

 Triglyceride (mmol/L)

0.94(0.7)

0.97(0.82)

0.96(0.65)

1.05(0.81)

0.00

 SCr (μmol/L)

65.21(12.82)

63.18(12.7)

62.42(11.99)

61.9(12.05)

0.00

 eGFR (ml/min/1.73 m2)

98.13(25.27)

102.47(27.23)

103.83(26.28)

104.58(26.33)

0.00

 ALT (U/L)

16.94(10.38)

17.64(10.5)

18.14(11.07)

19.95(12.67)

0.00

 FBS (mmol/L)

4.95(0.64)

4.96(0.6)

4.99(0.76)

5.08(0.93)

0.00

 SBP (mmHg)

113.33(15.57)

113.83(15.55)

114.54(15.66)

117.59(17.24)

0.00

 DBP (mmHg)

69.89(9.84)

70.91(9.92)

72.05(9.96)

74.3(10.8)

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; eGFR, estimated glomerular filtration rate; 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.