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This study explores the application of Cox proportional hazards models in analyzing survival data from clinical trials, specifically focusing on the ISIR dataset. By categorizing patients into survival groups based on their longevity (≤12 months and ≥12 months) and tracking changes over time, the research assesses how various factors influence survival rates. This analysis will enhance the understanding of survival outcomes and assist in developing tailored treatment strategies for better patient management.
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Survival 110 100 90 80 70 60 50 40 30 20 10 0 0 1 2 3 Survival ISIR 110 100 90 80 70 60 50 40 30 20 10 0 -8 -7 -6 -5 -4 -3 -2 Cox ISIR 3 2 1 0 -8 -7 -6 -5 -4 -3 -2 Cox survival groups ≤ 12 < t < 60 ≥ t 12 t 60