In contrast to the Kaplan-Meier method, Cox proportional hazards regression can provide an effect estimate by quantifying the difference in survival between patient groups and can adjust for confounding effects of other variables. The purpose of this article is to explain the basic concepts of the Cox regression method, and to provide some guidance regarding the presentation of the results. Cop...

Purpose Acknowledging, on the one hand, increasing fragility of supply chains and number risks involved in chain operations and, other role small- medium-sized enterprises (SMEs) high exposure these firms to different types, this study aims examine relationship between risk management (SCRM) innovation performance SMEs. Furthermore, impact technological turbulence was studied take into account ...

BACKGROUND High cyclooxygenase (COX)-2 expression in ovarian tumors has been associated with poor prognosis, but the role of COX-1 expression and its relation to survival is less clear. Here, we evaluated COX expression and associations with survival outcomes between type I (clear cell, mucinous, low grade endometrioid and low grade serous) and type II (high grade serous and high grade endometr...

background the aim of this study was to examine the impacts of multiple indicators of socio-economic status (ses) on congestive heart failure (chf) related readmission.   methods a prospective study consisting of 315 patients without the history of admission due to chf was carried out in tehran during 2010 and 2011. they were classified into quartiles based on their ses applying principal compo...