Available clinical data includes: age, gender, location and side of the primary tumour, response to chemotherapy according to the Huvos grading system (Rosen et al, 1982; when available), metastasis, recurrence, date of recurrence, survival, date of death (when applicable) and time of follow-up.
Up to June 30 , 2005 a total of 748 individuals were alive, 29 were transferred away with unknown vital status (the last date of known survival, which was end of Jan 1997, was considered as the censored date), and 491 had died.
According to information on their present status or date of death, survival time was calculated as the time from the start of treatment or from diagnosis in the case of BSC.
Each woman interviewed in the survey was asked to provide a detailed history of all her live births in chronological order, including whether a birth was single or multiple, sex of the child, date of birth, survival status, age of the child on the date of interview if alive, and if not alive, age at death of each live birth.
It's the online, Jewish dating version of survival of the fittest.
Period analysis is a method of obtaining more up-to-date estimates of survival, calculated using only survival experience in a recent time period (Brenner and Gefeller, 1996).
Alongside, up-to-date comparisons of survival, high-resolution studies are needed to examine potential differences in stage, co-morbidity, biology and treatments.
Various empirical studies have shown that period analysis provides more up-to-date estimates of survival that closely predict survival later observed for patients diagnosed in the respective period [ 24- 28].
