Table 2.

Cross-sectional correlations among measures of vitamin K and D status and demographic, nutritional, and laboratory variablesa

VariablesPhylloquinone%ucOCPIVKA-II25(OH)D
rPrPrPrP
Demographic variables
    age, yrs−0.030.72−0.050.55−0.050.59−0.010.95
    gender (male)−0.010.920.120.140.080.42−0.010.86
    eGFR, ml/min per 1.73 m2−0.040.62−0.260.01−0.120.230.200.009
    CKD stageb0.120.320.32<0.010.150.320.210.023
    etiology of CKDc0.060.890.260.010.120.67−0.290.003
    diabetes mellitus−0.150.07−0.200.010.000.980.160.05
    renovascular disease0.060.480.050.52−0.110.260.100.22
    glomerular0.100.20−0.120.140.010.930.170.03
    other−0.010.930.23<0.010.050.60−0.33<0.01
    CVD−0.020.810.140.080.160.12−0.220.52
    PVD−0.160.030.040.64−0.030.80−0.050.03
    Smoking status0.100.440.090.520.200.140.280.01
Nutritional variables
    BMI, kg/m20.090.230.070.40−0.010.89−0.28<0.001
    SGA, score/70.110.170.020.790.080.41−0.080.31
    weight change0.190.02−0.060.43−0.080.440.170.03
    food intake0.060.47−0.050.56−0.080.410.070.37
    anorexia0.050.500.020.770.030.780.050.54
    subcutaneous fat loss0.180.020.090.28−0.040.680.000.98
    muscle wasting0.210.01−0.030.670.060.530.010.85
    total energy, kcal/d0.050.54−0.090.24−0.100.330.030.68
Laboratory variables
    phosphate, mmol/L−0.010.920.32<0.0010.140.15−0.180.02
    calcium, mmol/L0.110.17−0.060.450.000.990.250.001
    ALP, mmol/L−0.110.180.170.030.000.98−0.170.03
    PTH, pmol/L−0.120.130.38<0.001−0.140.17−0.210.01
    albumin, g/L−0.080.71−0.140.07−0.060.530.41<0.001
    total cholesterol, mmol/L0.38<0.001−0.080.340.120.240.130.09
    LDL cholesterol, mmol/L0.250.01−0.090.260.030.760.190.02
    HDL cholesterol, mmol/L−0.030.74−0.040.63−0.120.250.210.01
    triglycerides, mmol/L0.56<0.001−0.080.340.220.03−0.050.53
    CRP, mg/L−0.080.340.210.010.150.16−0.230.01
    urinary ACR0.150.060.32<0.0010.120.25−0.38<0.001
  • a All r values are Spearman correlation coefficient unless noted otherwise. ALP, alkaline phosphatase; CVD, cardiovascular disease; ACR, albumin to creatinine ratio.

  • b r values are not Spearman correlation coefficient; the reported statistic is Eta (square root of the ANOVA R2), and the P value is for the ANOVA F-test.

  • c Spearman ρ for the dummy variable, supplied with the raw P value, and the P value-adjusted multiple comparison by the stepdown Bonferroni method.