BACKGROUND To compare the right and left transthoracic approach on the post-operative survival of patients with lymph node-negative esophageal squamous cell carcinoma. METHODS Six hundred and ninety-five ESCC patients who underwent esophagectomy between 1990 and 2005 were retrospectively enrolled in the present study and were confirmed by histology to be of no lymph node metastasis. Those who...

Graphical models are a useful tool with increasing diffusion. In the categorical variable framework, they provide important visual support to understand relationships among considered variables. Besides, particular chain graphical suitable represent multivariate regression models. However, associated parameterization, such as marginal log-linear models, is often difficult interpret when number ...

• Resources are central in strategies for managing supply chain disruptions but remain unspecified extant literatures. The resource interaction approach helps understanding resources and how they interact. paper offers an alternative to disruptions. emphasizes interdependence, collaborative strategy, interplay between temporary permanent organizing. turbulent business environment highlights the...

BACKGROUND AND PURPOSE Stroke is a documented risk factor for hip fracture. However, no documented studies are available on the risk of stroke among patients with hip fracture. This study investigated the frequency and risk of stroke after hip fracture using a nationwide population-based study. METHODS The study cohort included 2101 patients hospitalized with a principal diagnosis of hip frac...

BACKGROUND Whereas the prognosis of second kidney transplant recipients (STR) compared to the first ones has been frequently analyzed, no study has addressed the issue of comparing the risk factor effects on graft failure between both groups. METHODS Here, we propose two alternative strategies to study the heterogeneity of risk factors between two groups of patients: (i) a multiplicative-regr...

Confidence intervals (CIs) and the reported predictive ability of statistical models may be misleading if one ignores uncertainty in the model selection procedure. When analyzing time-to-event data using Cox regression, one typically checks the proportional hazards (PH) assumption and subsequently alters the model to address any violations. Such an examination and correction constitute a model ...

Background : The bones are the most common site of distant metastasis in nasopharyngeal carcinoma (NPC). Few prognostic markers are available to guide treatment and sub-classify patients with bone metastasis. We aimed to identify the prognostic value of pretreatment serum alkaline phosphatase (ALP) and plasma Epstein-Barr virus DNA (EBV DNA) in patients with bone-only metastasis. Methods : A to...

AMS 2000 subject classifications: 62N02 62G20 Keywords: Kaplan–Meier estimator Martingale Proportional hazards model Proportional odds model Right censoring U-statistic a b s t r a c t Recent advances in the transformation model have made it possible to use this model for analyzing a variety of censored survival data. For inference on the regression parameters, there are semiparametric procedur...

OBJECTIVE To demonstrate the advantage of using weighted Cox regression to analyze nested case-control data in overcoming limitations encountered with traditional conditional logistic regression. STUDY DESIGN AND SETTING We analyzed data from 1,051 women who were sampled in a case-control study of lung cancer nested within a cohort of breast cancer patients. We investigated how lung cancer ri...