The methods of survival analysis are required to analyze duration data but their use is restricted possibly due to lack of awareness and the intricacies involved. We explain common methods of survival analysis, namely, life table, Kaplan Meier, log rank and Cox model, in a simple and friendly language so that the medical fraternity can use them with confidence where applicable.

These observations were made by a Persian mathematician some 900 years ago. His sentiments are self-evident but no less easy to accept especially for operating surgeons. The reasons for staying on in the operating theatre are rarely financial. A recent survey shows that top surgeons earn more than ministers, which in Singapore, is quite a bit. If the reasons for continuing operative surgery are...

As the baby boom cohorts expand the number of U.S. retirees, population estimates of the employment, withdrawal and reentry behaviors of older Americans' remain scarce. How long do people work? How frequently is retirement reversed? How many years are people retired? What is the modal age of retirement? And, how do the patterns for women compare to those for men? Using the 1992-2004 Health and ...

OBJECTIVE This report, following publication of the national life tables (1,2) for 1999-2001, presents state-specific life tables for the 50 states and District of Columbia by race (white and black) and sex. These tables are the most recent in a series of decennial life tables for the United States. METHODS Data used to prepare these state-specific life tables include population counts by age...

several tables have been given due to a − minimal sets. our main aim in this paper is tocomplete these tables by employing several examples.

A Semantic Decision Table (SDT) provides a means to capture and examine decision makers’ concepts, as well as a tool for refining their decision knowledge and facilitating knowledge sharing in a scalable manner. One challenge SDT faces is to organize decision resources represented in a tabular format based on the user’s needs at different levels. It is important to make it self organized and au...

Teaching of surgery has been affected by many factors over the last years, such as the reduction of working hours, the optimization of the use of the operating room or patient safety. Traditional teaching methodology fails to reduce the impact of these factors on surgeońs training. Simulation as a teaching model minimizes such impact, and is more effective than traditional teaching methods for ...

The medical profession is rich with anecdotes about surgeons, many of national and international repute, using colourful language in the operating theatre. Legend has it that the language of the mildest mannered and pious surgeon, once he or she is gowned and gloved, undergoes a transformation. However, a Medline search of the past 20 years using the search words “swear,” ‘‘swearing,” ‘‘foul la...