Book ChapterDOI
Nonparametric Estimation from Incomplete Observations
Edward L. Kaplan,Paul Meier +1 more
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TLDR
In this article, the product-limit (PL) estimator was proposed to estimate the proportion of items in the population whose lifetimes would exceed t (in the absence of such losses), without making any assumption about the form of the function P(t).Abstract:
In lifetesting, medical follow-up, and other fields the observation of the time of occurrence of the event of interest (called a death) may be prevented for some of the items of the sample by the previous occurrence of some other event (called a loss). Losses may be either accidental or controlled, the latter resulting from a decision to terminate certain observations. In either case it is usually assumed in this paper that the lifetime (age at death) is independent of the potential loss time; in practice this assumption deserves careful scrutiny. Despite the resulting incompleteness of the data, it is desired to estimate the proportion P(t) of items in the population whose lifetimes would exceed t (in the absence of such losses), without making any assumption about the form of the function P(t). The observation for each item of a suitable initial event, marking the beginning of its lifetime, is presupposed. For random samples of size N the product-limit (PL) estimate can be defined as follows: L...read more
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Journal ArticleDOI
Coronary intervention for persistent occlusion after myocardial infarction.
Judith S. Hochman,Gervasio A. Lamas,Christopher E. Buller,Vladimir Dzavik,Harmony R. Reynolds,Staci J. Abramsky,Sandra A. Forman,Witold Rużyłło,Aldo P. Maggioni,Harvey D. White,Zygmunt Sadowski,Antonio Carlos Carvalho,Jamie Rankin,Jean Renkin,P. Gabriel Steg,Alice M. Mascette,George Sopko,Matthias Pfisterer,Jonathan Leor,Viliam Fridrich,Daniel B. Mark,Genell L. Knatterud +21 more
TL;DR: PCI did not reduce the occurrence of death, reinFarction, or heart failure, and there was a trend toward excess reinfarction during 4 years of follow-up in stable patients with occlusion of the infarct-related artery 3 to 28 days after myocardial infarction.
Journal ArticleDOI
Unexpected Abrupt Increase in Left Ventricular Assist Device Thrombosis
Randall C. Starling,Nader Moazami,Scott C. Silvestry,Gregory A. Ewald,Joseph G. Rogers,Carmelo A. Milano,J. Eduardo Rame,Michael A. Acker,Eugene H. Blackstone,John Ehrlinger,Lucy Thuita,Maria Mountis,Edward G. Soltesz,Bruce W. Lytle,Nicholas G. Smedira +14 more
TL;DR: The rate of pump thrombosis related to the use of the HeartMate II has been increasing at centers and is associated with substantial morbidity and mortality.
Journal ArticleDOI
A prognostic index for ductal carcinoma in situ of the breast.
Melvin J. Silverstein,Michael D. Lagios,Pamela H. Craig,James R. Waisman,Bernard S. Lewinsky,William J. Colburn,David N. Poller +6 more
TL;DR: The Van Nuys Prognostic Index (VNPI) was developed to aid in the complex treatment selection process.
Journal ArticleDOI
A postoperative prognostic nomogram for renal cell carcinoma
TL;DR: A nomogram has been developed that can be used to predict the 5-year probability of treatment failure among patients with newly diagnosed renal cell carcinoma and may be useful for patient counseling, clinical trial design and patient followup planning.
Journal ArticleDOI
Randomized Trial of Breast Self-Examination in Shanghai: Final Results
David B. Thomas,Dao Li Gao,Roberta M. Ray,Wen wan Wang,Charlene J. Allison,Fan liang Chen,Peggy L. Porter,Yong Wei Hu,Guan lin Zhao,Lei da Pan,Wenjin Li,Chunyuan Wu,Zakia Coriaty,Ilonka Evans,Ming Gang Lin,Helge Stalsberg,Steven G. Self +16 more
TL;DR: Intensive instruction in BSE did not reduce mortality from breast cancer and programs to encourage BSE in the absence of mammography would be unlikely to reduce mortalityFrom breast cancer.
References
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Journal ArticleDOI
Survival Curve for Cancer Patients Following Treatment
Joseph Berkson,Robert P. Gage +1 more
TL;DR: A simple function, in terms of two physically meaningful parameters, has been evolved, which fits survivorship data very well and can be used to compare succinctly the mortality of two groups, different in respect of treatment, type of cancer, or other characteristics.
Journal ArticleDOI
An analysis of some failure data
TL;DR: The rationale and statistical techniques employed in the analysis of some failure data obtained from operations performed by machines and people are summarized and the agreement between theory and data is evaluated.