Skip to main content

Table 5 Estimates from the Classical AFT and the Cox PH Models

From: Accelerated failure-time model with weighted least-squares estimation: application on survival of HIV positives

Method Covariates Estimates SE 95%CI
LCL UCL
LN AFT meanlog 4.832 0.1564 4.526 5.139
sdlog 0.232 0.0286 0.182 0.295
Age −0.009 0.0029 − 0.015 −0.003
Weight 0.008 0.0032 0.002 0.014
CS (IV) −0.278 0.0599 −0.395 − 0.160
Rank Age −0.009 0.0033 −0.015 −0.002
Weight 0.008 0.0033 0.001 0.014
CS (IV) −0.277 0.0572 −0.389 − 0.165
LSE Age −0.009 0.0027 −0.014 −0.004
Weight 0.008 0.0026 0.003 0.013
CS (IV) −0.272 0.0530 −0.376 − 0.168
Cox PH Age 0.054 0.0177 0.019 0.089
Weight −0.047 0.0228 −0.092 − 0.002
CS (IV) 1.917 0.3684 1.195 2.639
  1. Estimates: Coefficients Correspond to the log Median Survival Time for the First Three and log Hazard for the Cox PH; Estimate for Age corresponds to a year increase in Age; Estimate for Weight corresponds to a Kilogram increase in Weight; SE: Standard Error; CI: Confidence Interval; LCL: Lower Confidence Limit; UCL: Upper Confidence Limit; LN AFT: Log-Normal Accelerated Failure-Time; CS: Clinical Stage; LSE: Least Square Estimation; PH: Proportional-Hazards; meanlog: Mean of Log Survival Time; sdlog: Standard Deviation of Log Survival Time.