Table 4.

Adjusted Cox model of survival in each of the modalities

FactorHazard Ratio (95% CI)P Value
Hemodialysis0.47 (0.20–1.10)0.08
Peritoneal dialysis0.39 (0.10–1.48)0.17
Age (in yr)1.02 (0.97–1.05)0.41
Comorbidity (high versus low)3.71 (1.63–8.43)0.002
KPS score × propensity interaction1.18 (0.21–6.64)0.85
Physical health score (SF-36)0.99 (0.97–1.01)0.51
  • Survival time was the time that elapsed from the point at which patients were recruited to the study, to the census date or the date of censoring (date of death, date of transfer to another center, date to transplant, date of requested withdrawal from the study). The table indicates reduced hazard for death for patients undergoing hemodialysis and peritoneal dialysis compared with conservative kidney management, although the differences are of borderline or less statistical reliability. Estimated median survival times were as follows: for hemodialysis, 1317 days; for conservative kidney management, 913 days; and for peritoneal dialysis, 1394 days. High comorbidity was associated with a significantly increased hazard. KPS score × propensity score is the interaction between Karnofsky performance scale score and propensity score, included because of colinearity between these covariates. CI, confidence interval; KPS, Karnofsky performance scale; SF-36, Short-Form 36 questionnaire.