قارن الطرق

	نموذج كوكس التناسبي للمخاطر الاستشرافي	نموذج كوكس للمخاطر النسبية
المجال	علم الأوبئة	علم الأوبئة
العائلة	Process / pipeline	Process / pipeline
سنة النشأة	1972 (Cox model); widespread prospective application from late 1970s	1972
صاحب الطريقة	David R. Cox (model); applied prospectively in large cohort studies from 1970s onward	Sir David Roxbee Cox
النوع	Semi-parametric survival regression applied to prospectively collected time-to-event data	Semi-parametric regression model
المصدر التأسيسي	Cox, D. R. (1972). Regression models and life-tables. Journal of the Royal Statistical Society: Series B (Methodological), 34(2), 187–202.	Cox, D. R. (1972). Regression models and life-tables. Journal of the Royal Statistical Society: Series B (Methodological), 34(2), 187–202.
الأسماء البديلة	prospective Cox regression, Cox PH prospective study, prospective survival regression, prospective hazard modeling	Cox regression, Cox PH model, proportional hazards model, CPH
ذات صلة	4	5
الملخص	Prospective Cox proportional hazards regression combines a forward-looking cohort design — in which participants are enrolled before outcomes occur and followed over time — with Cox's semi-parametric survival model. The method estimates how baseline covariates measured at enrollment influence the rate at which participants experience a time-to-event outcome, while preserving the temporal direction required for causal inference. It is one of the most widely used analytical frameworks in clinical epidemiology and chronic disease research.	The Cox proportional hazards model is a semi-parametric regression method that estimates the effect of one or more covariates on the hazard — the instantaneous rate of an event such as death, relapse, or failure — while making no assumption about the shape of the baseline hazard function. Introduced by David Cox in 1972, it is the dominant tool for multivariable survival analysis in clinical and epidemiological research.