Case Control Study
Copyright ©The Author(s) 2015.
World J Nephrol. Feb 6, 2015; 4(1): 127-137
Published online Feb 6, 2015. doi: 10.5527/wjn.v4.i1.127
Table 1 Differences between methylenetetrahydrofolate reductase groups in all patients
Wild genotypeHeterozygous MTHFR C677THeterozygous MTHFR 1298 ACCompound heterozygous C677T and A1298CHomozygous MTHFR 1298 CCHomozygous MTHFR 677TTP
(n = 94)(n = 118)(n = 76)(n = 154)(n = 80)(n = 104)
Age, yr53.30 ± 11.8951.59 ± 17.3956.74 ± 16.5557.91 ± 17.0457.85 ± 14.7050.12 ± 17.09< 0.0001
BMI, kg/m227.26 ± 5.0427.28 ± 5.9528.04 ± 5.8427.80 ± 6.1327.01 ± 3.9228.72 ± 6.610.316
GFR48.84 ± 32.9066.05 ± 36.7064.16 ± 36.3263.31 ± 38.3561.57 ± 34.9168.85 ± 27.330.002
Triglycerides, mg/dL109.96 ± 75.73113.21 ± 57.91107.63 ± 42.67128.72 ± 85.2995.46 ± 37.07103.94 ± 48.930.003
Total cholesterol, mg/dL191.67 ± 41.71206.29 ± 52.53203.84 ± 38.73198.28 ± 41.37196.06 ± 54.99201.54 ± 34.490.206
HDL cholesterol, mg/dL58.11 ± 20.9155.17 ± 15.7555.28 ± 18.4652.52 ± 18.4952.51 ± 18.5056.27 ± 16.350.175
LDL cholesterol, mg/dL111.57 ± 34.89128.47 ± 48.01127.04 ± 31.67120.81 ± 35.73124.46 ± 48.10124.89 ± 35.300.039
AST, U/L19.50 ± 6.3023.32 ± 14.2327.93 ± 17.6920.49 ± 6.9121.76 ± 12.2619.72 ± 5.99< 0.0001
ALT, U/L15.82 ± 4.5916.46 ± 5.3818.51 ± 5.7516.46 ± 5.9316.59 ± 5.7415.92 ± 5.900.031
γGT, U/L24.63 ± 12.2033.82 ± 25.9637.45 ± 38.0342.71 ± 48.6428.94 ± 15.1725.37 ± 16.29< 0.0001
HOMA2.00 ± 1.133.18 ± 3.493.04 ± 2.274.04 ± 4.872.28 ± 1.072.76 ± 2.77< 0.0001
PTH, pg/mL84.94 ± 100.3784.49 ± 170.9778.37 ± 65.9586.30 ± 76.7586.53 ± 95.9784.83 ± 81.830.997
hsCRP, mg/dL2.58 ± 4.412.15 ± 2.796.30 ± 13.554.30 ± 8.663.99 ± 6.423.51 ± 4.95< 0.001
RRI0.60 ± 0.050.59 ± 0.050.59 ± 0.040.58 ± 0.050.59 ± 0.070.59 ± 0.060.392
EF, %67.05 ± 8.1866.94 ± 9.1965.99 ± 9.1563.52 ± 12.0467.15 ± 11.6366.51 ± 7.260.035
E/A1.15 ± 0.361.20 ± 0.261.23 ± 0.341.09 ± 0.401.01 ± 0.261.18 ± 0.31< 0.0001
LVMM/m2100.48 ± 54.70105.44 ± 33.79107.69 ± 48.47109.21 ± 41.02110.38 ± 46.6397.11 ± 28.690.179
AMDS34.94 ± 2.5234.97 ± 3.0333.42 ± 3.8834.23 ± 3.0234.93 ± 2.6834.46 ± 3.180.005
Homocysteine μmol/L17.41 ± 3.0025.53 ± 8.1228.58 ± 9.2318.68 ± 9.0121.26 ± 9.1718.83 ± 6.25< 0.0001
Table 2 Characteristic of study population and differences between hemodialysis patients and no-hemodialysis n (%)
TotalDialysis patientsPatients with maintainedP
(n = 630)(n = 160)Renal function
(n = 470)
Women336 (53.3)722640.0141
Obese patients196 (31.1)24172< 0.0001
Patients with GFR < 90514 (81.6)160354< 0.0001
NAFLD patients256 (40.6)28228< 0.0001
MTHFR group
Wild genotype94 (14.9)36580.0161
MTHFR C677T118 (18.7)2890
MTHFR 1298 AC76 (12.1)2056
Compound heterozygous C677T and A1298C158 (25.1)40118
MTHFR 1298 CC80 (12.7)2060
MTHFR 677TT104 (16.5)1688
Age, yr54.60 ± 16.3567.48 ± 14.5750.22 ± 14.51< 0.0001
BMI, kg/m227.70 ± 5.7625.29 ± 3.9728.52 ± 6.04< 0.0001
Blood glucose, mg/dL96.42 ± 26.4295.33 ± 34.8096.79 ± 22.910.545
Blood urea, mg/dL52.47 ± 35.74100.45 ± 41.0736.13 ± 9.40< 0.0001
Creatinin, mg/dL2.36 ± 2.986.75 ± 2.990.86 ± 0.21< 0.0001
GFR62.46 ± 35.329.28 ± 3.6080.56 ± 19.38< 0.0001
Triglycerides, mg/dL112.16 ± 64.71131.90 ± 87.21105.44 ± 53.48< 0.0001
Total cholesterol, mg/dL199.72 ± 44.43175.80 ± 42.67207.86 ± 42.05< 0.0001
HDL cholesterol, mg/dL54.81 ± 18.1048.20 ± 15.6357.07 ± 18.34< 0.0001
LDL cholesterol, mg/dL122.75 ± 39.63101.22 ± 33.04130.09 ± 39.05< 0.0001
AST, U/L21.81 ± 11.1614.38 ± 4.0724.34 ± 11.66< 0.0001
ALT, U/L16.54 ± 5.6312.75 ± 4.1517.83 ± 5.49< 0.0001
γGT, U/L33.10 ± 32.1131.78 ± 19.1833.55 ± 35.460.546
Insulin11.84 ± 9.7311.44 ± 10.7711.98 ± 9.360.547
HOMA3.02 ± 3.303.08 ± 3.943.00 ± 3.050.797
PTH, pg/mL84.58 ± 105.79162.38 ± 178.8157.99 ± 36.85< 0.0001
hsCRP, mg/dL3.52 ± 7.012.62 ± 2.453.82 ± 7.980.107
Albumin, g/dL4.60 ± 0.374.64 ± 0.354.58 ± 0.370.119
Albumin, %62.39 ± 3.6062.60 ± 3.0362.31 ± 3.770.388
RRI0.62 ± 0.060.68 ± 0.030.60 ± 0.06< 0.0001
EF,%65.93 ± 9.9961.03 ± 12.6267.87 ± 7.95< 0.0001
E/A1.14 ± 0.331.03 ± 0.391.18 ± 0.30< 0.0001
LVMM/m2104.95 ± 42.10135.37 ± 55.5693.84 ± 28.91< 0.0001
AMDS34.51 ± 3.0935.93 ± 1.6934.02 ± 3.31< 0.0001
Homocysteine, μmol/L2.1 ± 5.436.8 ± 8.521.2 ± 7.7< 0.0001
Table 3 Different prevalence of increased renal resistive index, abnormal left ventricular ejection fraction, normal left ventricular relaxation (E/A > 1), and left ventricular hypertrophy (all patients)
WildHeterozygousHeterozygousCompound heterozygousHomozygousHomozygousχ2P
MTHFRC677TA1298CC677T and A1298CA1298CC677T
(n = 94)(n = 118)(n = 76)(n = 154)(n = 80)(n = 104)
high RRI2430163828225.7460.332
EF < 50%444144011.1880.048
E/A > 1681006674427053.497< 0.0001
LVH (high LVMM)12361844132014.9230.011
Table 4 Different prevalence of increased renal resistive index, abnormal left ventricular ejection fraction, normal left ventricular relaxation (E/A > 1), and left ventricular hypertrophy (chronic renal failure patients-hemodialysis)
WildHeterozygousHeterozygousCompound heterozygousHomozygousHomozygousχ2P
MTHFRC677TA1298CC677T and A1298CA1298CC677T
(n = 36)(n = 28)(n = 20)(n = 40)(n = 20)(n = 16)
High RRI2020828161210.5350.061
EF < 50%44412409.1140.105
E/A > 124241680072.305< 0.0001
High LVMM8164325438.428< 0.0001
Table 5 Different prevalence of increased renal resistive index, abnormal left ventricular ejection fraction, normal left ventricular relaxation (E/A > 1), and left ventricular hypertrophy (normal renal function patients)
WildHeterozygousHeterozygousCompound heterozygousHomozygousHomozygousχ2P
MTHFRC677TA1298CC677T and A1298CA1298CC677T
(n = 58)(n = 90)(n = 56)(n = 118)(n = 62)(n = 88)
high RRI41081012106.8330.233
EF < 50%0002005.7980.326
E/A > 144765066427019.8480.001
High LVMM420141281613.3550.02