Cancer hazards

Proportional hazards regression for cancer studies.

There has been some recent work in the statistical literature for modeling the relationship between the size of cancers and probability of detecting metastasis, i.e., aggressive disease. Methods for assessing covariate effects in these studies are limited. In this article, we formulate the problem as assessing covariate effects on a right-censored variable subject to two types of sampling bias....

Multivariate Analysis of Gastric Cancer Prognosis Using Additive Hazards Regression

Gastric cancer (GC) is the fourth most common cancer and the second leading cause of cancer-related death in the world. A 2005 analysis of the global incidence and cancer-related mortality revealed that 934,000 new cases of GC were diagnosed and approximately 700,000 patients died from this disease in 2002 (Parkin et al., 2005). Approximately 60% of all cases occur in developing countries with ...

Information Hazards

Information hazards are risks that arise from the dissemination or the potential dissemination of true information that may cause harm or enable some agent to cause harm. Such hazards are often subtler than direct physical threats, and, as a consequence, are easily overlooked. They can, however, be important. This paper surveys the terrain and proposes a taxonomy.

Environmental hazards

Obstetric problems This is the most widely recognised environmental hazard of anaesthesia but individual opinions, as well as governmental and professional reactions, differ widely. Some feel that not enough is being done about the problem while others maintain either that there is no problem and that much research and finance has been misdirected, or that scavenging devices introduce an unacce...

Transportation hazards