OBJECTIVES We evaluated the hypothesis that cyclooxygenase (COX) inhibitor use might have counteracted a beneficial effect of postmenopausal hormone therapy, and account for the absence of cardioprotection in the Women's Health Initiative hormone trials. Estrogen increases COX expression, and inhibitors of COX such as nonsteroidal anti-inflammatory agents appear to increase coronary risk, raisi...

This paper examines the competitiveness of The Gambia agri-food exports from 2012 to 2021 utilizing revealed comparative advantage index, Kaplan-Meier survival function, and Cox regression model. results indicate that thirteen twenty-four products have advantages in global market, while seven regional market. In terms product structure, raw materials are sources trade. While processed offer gen...

BACKGROUND AND PURPOSE Several studies indicate that stroke increases the risk of dementia. Most of these studies lacked the ability to take accurately assessed prestroke cognitive function into account. Whether the effects of stroke merely unravel an ongoing underlying dementing process or in fact cause the dementia has implications for the prevention of dementia in persons with cerebrovascula...

Choose the Cox proportional hazards regression model if the values in your dependent variable are duration observations. The advantage of the semi-parametric Cox proportional hazards model over fully parametric models such as the exponential or Weibull models is that it makes no assumptions about the shape of the baseline hazard. The model only requires the proportional hazards assumption that ...

Choose the Cox proportional hazards regression model if the values in your dependent variable are duration observations. The advantage of the semi-parametric Cox proportional hazards model over fully parametric models such as the exponential or Weibull models is that it makes no assumptions about the shape of the baseline hazard. The model only requires the proportional hazards assumption that ...

Choose the Cox proportional hazards regression model if the values in your dependent variable are duration observations. The advantage of the semi-parametric Cox proportional hazards model over fully parametric models such as the exponential or Weibull models is that it makes no assumptions about the shape of the baseline hazard. The model only requires the proportional hazards assumption that ...

background: the incidence of restenosis in patients suffering from coronary artery disease after undergoing angioplasty is of paramount importance. accordingly, this study aimed to investigate factors affecting the time of the first incidence of restenosis in patients undergone angioplasty in the city of zanjan, iran.   methods: this retrospective cohort study was conducted on 421 patients who ...

We provide an asymptotic linear representation for the Breslow estimator for the baseline cumulative hazard function in the Cox model. The representation consists of an average of independent random variables and a term involving the difference between the maximum partial likelihood estimator and the underlying regression parameter. The order of the remainder term is arbitrarily close to n−1.

Pandemi berdampak pada segala aspek kehidupan, salah satunya yaitu perekonomian yang mana mampu mempengaruhi keputusan investor dalam berinvestasi di pasar modal atau Bursa Efek Indonesia (BEI). Terdapat banyak indeks saham BEI, LQ45. Indeks LQ45 merupakan kumpulan 45 emiten terbaik dengan likuiditas tinggi dan kapitalisasi besar serta fundamental perusahaan baik. Fundamental ini mengacu perfor...

The Cox regression model is a cornerstone of modern survival analysis and is widely used in many other fields as well. But the Cox models with time-change covariates are not easy to understand or visualize. We therefore offer a simple and easy-to-understand interpretation of the (arbitrary) baseline hazard and time-change covariate. This interpretation also provides a way to simulate variables ...