Cox Proportional Hazards Model The PHREG procedure in SAS/STAT software performs regression analysis of survival or duration data based on the Cox proportional hazards model. Cox's semiparametric ...

Logistic regression models are used in cross-sectional and case–control studies, whereas Cox proportional hazards models are usually applied to prospective studies that have a follow-up period ...

The Cox model is a semiparametric model in which the hazard function of the survival time is given by where h 0 ( t ) is an unspecified baseline hazard function, x ( t ) is a vectors of covariate ...

Tregouet, DA., Tiret, L. Cox proportional hazards survival regression in haplotype-based association analysis using the Stochastic-EM algorithm. Eur J Hum Genet 12 , 971–974 (2004). https://doi ...

Visit-to-visit FEV1 variation was found to be a mortality risk factor among 9/11 FDNY rescue and recovery workers.

Using a Cox proportional hazard regression model, researchers determined that the risk of AKD was highest in the second week post-infection, with a hazard ratio of 12.77.

According to their lymph node status, they were classified in the following four groups: 2,383 were node negative, 107 had isolated tumor cells, 123 had micrometastases, and 756 had macrometastases.

We describe here a large series of HIV-infected patients with PEL, including 28 cases diagnosed in six centers during an 11-year time period. Prognosis analysis was performed using a Cox proportional ...