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Table 3 The effect of the variables on the hazard of death and on the survival time of the study patients (expressed by event-time ratio) resulted from Cox proportional hazards and AFT log-normal; respectively

From: Factors influencing survival time of hemodialysis patients; time to event analysis using parametric models: a cohort study

Cox PH regression AFT lognormal regression
Variable HR(95% CI) P-value ETR(95% CI) P-value
Age (year) 1.009 (0.999, 1.018) 0.075 0.997 (0.992, 1.002) 0.202
UF (ml) 1.146 (1.001, 1.313) 0.049* 0.951 (0.882, 1.025) 0.189
Sodium (meq/lit) 0.972 (0.943, 1.001) 0.061 1.013 (0.998, 1.028) 0.086
Calcium (mg/dl) 1.117 (0.984, 1.268) 0.086 0.961 (0.894, 1.033) 0.277
WBC(103/ micl) 1.039 (1.015, 1.063) 0.001* 0.982 (0.968, 0.997) 0.018*
RBC (106/ micl) 0.817 (0.671, 0.995) 0.044* 1.131 (1.017, 1.258) 0.023*
MCHC (g/dl) 0.887 (0.824, 0.954) 0.001* 1.067 (1.025, 1.109) 0.001*
Albumin (g/dl) 0.616 (0.483, 0.786) < 0.001* 1.232 (1.080, 1.407) 0.002*
ALKPH (IU/L) 1.001 (0.999, 1.001) 0.144 0.999 (0.998, 1.0002) 0.243
  1. *P-value < 0.05 is considered significant
  2. Abbreviations: coef estimated coefficient, CI confidence interval, ETR event time ratio, HR hazard ratio, ALKPH alkaline phosphatase, MCHC mean corpuscular hemoglobin concentration, RBC red blood cell, UF ultrafiltration volume, WBC white blood