Table 1.

Baseline demographic and clinical characteristics of study subjects according to tertile of average sodium intake

Basic CharacteristicTertile of Average Sodium IntakeP
LowMiddleHigh
Follow-up, mo30.59 ± 11.3132.88 ± 13.8230.56 ± 15.630.38
Age, yr63.08 ± 12.8a61.07 ± 13.02a54.16 ± 15.14<0.001b
Male gender, % (n)20.8 (21/101)a42.2 (43/102)c63.7 (65/102)<0.001b
BMI, kg/m222.63 ± 3.59c,d23.89 ± 3.7123.68 ± 3.940.04e
Diabetes, % (n)33.7 (34/101)46.1 (47/102)41.2 (42/102)0.16
Cardiovascular disease, % (n)64.4 (65/101)61.8 (63/102)58.8 (60/102)0.82
Urine volume, ml808.97 ± 425.80a882.31 ± 435.93c1010.85 ± 496.140.007
eGFR, ml/min per 1.73 m26.64 (1.8∼21.4)6.97 (2.4∼16.7)6.32 (1.5∼23.2)0.43
Hb, g/L100.70 ± 16.82102.75 ± 16.33104.36 ± 16.110.31
Alb, g/L35.82 ± 4.8635.32 ± 4.3235.69 ± 4.480.58
CRP, mg/L4.11 (0.17∼292)2.31 (0.17∼90.7)2.08 (0.17∼59.78)0.008e
Bicarbonate, mmol/L24.04 ± 2.5124.36 ± 2.3223.75 ± 2.560.26
  • Values are mean ± SEM, median (minimum to maximum), or absolute numbers with percentages.

  • a P < 0.001 compared to high-tertile group.

  • b P < 0.001 compared between three groups.

  • c P < 0.05 compared to high-tertile group.

  • d P < 0.001 compared to middle-tertile group.

  • e P < 0.05 compared between three groups.