11.07.2015 Views

Cox regression IV. Competing risks.

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u n i v e r s i t y o f c o p e n h a g e nd e p a r t m e n t o f b i o s t a t i s t i c sÅrsagsspecifik <strong>Cox</strong>-<strong>regression</strong>I liveλ 1 (t) Død af årsag 1✑✑✑✑✸✑◗ ◗◗◗◗λ 2 (t)Død af årsag 2hvor vi formulerer en <strong>Cox</strong>-model for begge hazardsλ 1 (t) ≈λ 2 (t) ≈P(t ≤ T < t + h, årsag = 1 | T ≥ t)hP(t ≤ T < t + h, årsag = 2 | T ≥ t).hDen kumulative incidens P 1 (t) afhænger af både λ 1 og λ 2 .43 / 47

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