Cox versus log-logistic models for long-term survival in patients undergoing coronary artery bypass grafting with and without coronary endarterectomy.

The study examined survival outcomes after coronary endarterectomy in off-pump coronary artery bypass grafting in a Middle Eastern cohort.

• The study population represented an underrepresented Middle Eastern cohort with high CE rates
• The study compared patients undergoing OPCAB with and without coronary endarterectomy
• Survival outcomes after CE in OPCAB were described as remaining controversial due to variable complications

The study compared Cox proportional hazards and log-logistic parametric models for analyzing long-term survival in this surgical population.

• Two competing survival analysis frameworks were evaluated: the Cox (semi-parametric) model and the log-logistic (parametric) model
• Model selection was identified as challenging in this specific population context
• The comparison addressed the appropriateness of each model for long-term survival data in CE versus non-CE patients