The conditional survival statistics for survivors with primary supratentorial astrocytic tumors

Citation
Sl. Hwang et al., The conditional survival statistics for survivors with primary supratentorial astrocytic tumors, J NEURO-ONC, 50(3), 2000, pp. 257-264
Citations number
26
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Oncology
Journal title
JOURNAL OF NEURO-ONCOLOGY
ISSN journal
0167-594X → ACNP
Volume
50
Issue
3
Year of publication
2000
Pages
257 - 264
Database
ISI
SICI code
0167-594X(200012)50:3<257:TCSSFS>2.0.ZU;2-9
Abstract
Background. Relative survival rates can offer a general description of tumo r outcome and, traditionally, are used for surveillance and comparison purp oses. However, they are not informative for individual tumor survivors. Con ditional survival estimates can calculate the probability of surviving next some years given survival to a specific period of time after craniotomy fo r individual tumor survivors. However, clinically, they have not been used for predicting the tumor outcome. Methods. We calculated conditional probabilities of survival within 6 years after craniotomy in 112 patients with primary supratentorial astrocytic tu mors and evaluated factors affecting the survival time more than 2 years af ter craniotomy. Results. Our data showed that the conditional probability of survival can p redict yearly survival rate when patients survive for a specific period of time. The conditional survival rates within 6 years after craniotomy were a lways higher than those evaluated by relative survival rates. Overall, the longer the patients survived, the higher the conditional probabilities of s urviving sixth year postoperatively were. Conclusion. Our study demonstrates the conditional probabilities of surviva l have good availability and are important estimates for individual tumor s urvivors.