Table 3.

Correlation between demographic, clinical, and laboratory measures and cognitive function measures by univariable correlation analysis

Variable3MSTrails ATrails BImmediate MemoryDelayed MemoryLanguage Ability
r ValueP Valuer ValueP Valuer ValueP Valuer ValueP Valuer ValueP Valuer ValueP Value
Age−0.33<0.0010.36<0.0010.37<0.001−0.23<0.001−0.080.10−0.110.02
Female sex−0.140.0020.21<0.0010.17<0.001−0.060.21−0.060.20−0.060.19
PD duration 0.010.84−0.010.810.020.670.010.760.090.060.030.56
Primary kidney disease0.010.79−0.010.89−0.030.500.010.77−0.050.280.020.73
Diabetes mellitus−0.150.0010.160.0010.19<0.001−0.15<0.001−0.030.48−0.100.03
Cardiovascular disease−0.100.020.090.050.100.03−0.120.01−0.030.56−0.080.07
Level of education0.51<0.001−0.37<0.001−0.36<0.0010.44<0.0010.48<0.0010.34<0.001
Body mass index−0.160.0010.090.070.140.003−0.15<0.001−0.110.02−0.060.17
Mean arterial pressure 0.010.91−0.090.06−0.110.030.030.52−0.120.01−0.070.15
Serum sodium0.130.005−0.090.06−0.120.010.120.010.070.140.050.25
Hyponatremia−0.19<0.0010.140.0030.130.005−0.110.02−0.130.01−0.110.02
Hemoglobin 0.110.01−0.080.09−0.0020.960.000.930.18<0.0010.080.07
Serum albumin 0.33<0.001−0.25<0.001−0.22<0.0010.17<0.0010.30<0.0010.19<0.001
hsCRP−0.100.040.110.030.110.03−0.130.01−0.130.01−0.070.13
RRF0.040.43−0.050.28−0.070.170.000.930.000.96−0.030.52
Total Kt/V0.040.46−0.010.91−0.030.600.050.280.070.12−0.020.63
Total Ccr0.010.80−0.030.59−0.050.30−0.010.86−0.020.64−0.070.13
  • 3MS, Modified Mini-Mental State Examination; Trails A, trail making test A; Trails B, trail making test B; PD, peritoneal dialysis; hsCRP, high-sensitivity C-reactive protein; RRF, residual renal function; Ccr: creatinine clearance.