Table 2.

Correlation coefficients between cytokine concentrations

VariableDialysatePlasma
IL-1βIFN-γIL-6TNF-αIL-1βIFN-γTNF-α
Incident
 Dialysate (n=563)
  IFN-γ0.65a
  IL-60.29a0.29a
  TNF-α0.82a0.74a0.42a
 Plasma (n=557)
  IL-1β−0.0040.005−0.01−0.07
  IFN-γ0.0002−0.010.11−0.0070.1
  TNF-α−0.05−0.010.15b−0.030.080.5a
  IL-60.050.090.28a0.040.13b0.25a0.35a
Prevalent
 Dialysate (n=378)
  IFN-γ0.61a
  IL-60.21a0.32a
  TNF-α0.76a0.75a0.4a
 Plasma (n=379)
  IL-1β0.120.1−0.020.09
  IFN-γ0.040.05−0.0010.050.12
  TNF-α−0.07−0.060.110.010.140.43a
  IL-6−0.020.110.27a0.070.150.24a0.29a
  • There were 548 and 374 common observations between dialysate and plasma samples for incident and prevalent, patients respectively.

  • a Sidak adjusted P values ≤0.001.

  • b P=0.01–0.05; otherwise P<0.05.