Results 221 to 230 of about 1,699,826 (261)

Cognitive functioning predicts survival in the elderly

Journal of Clinical and Experimental Neuropsychology, 2008
Prior studies of aging have identified a number of predictors of survival, including performances on some cognitive-functioning tests. However, few studies have used a multidomain test battery to identify which specific cognitive abilities predict death.
Duff, K., Mold, J., Gidron, Yori
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Medulloblastoma in childhood. Survival and functional results

Acta Neurochirurgica, 1979
The authors report on a series of 57 medulloblastomas in children operated upon -etween 1964 and 1976. Among these children, 44 completed the treatment with radiotherapy to the whole central nervous system. The postoperative mortality rate in 10.5%. Postoperative deaths occurred mainly in infants or when a tumour involved the brain stem.
J F, Hirsch, D, Renier, P, Czernichow, L, Benveniste, A, Pierre-Kahn   +4 more
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Product-limit survival functions with correlated survival times

Lifetime Data Analysis, 1995
A simple variance estimator for product-limit survival functions is demonstrated for survival times with nested errors. Such data arise whenever survival times are observed within clusters of related observations. Greenwood's formula, which assumes independent observations, is not appropriate in this situation.
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Variance estimation of a survival function for interval‐censored survival data

Statistics in Medicine, 2001
AbstractInterval‐censored survival data often occur in medical studies, especially in clinical trials. In this case, many authors have considered estimation of a survival function. There is, however, relatively little discussion on estimating the variance of estimated survival functions. For right‐censored data, a special case of interval‐censored data,
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Survival Function

2016
Survival data arise when we are interested in the time of occurrence of an event, and the survival function describes the cumulative probability of surviving beyond a given time point in a given group of individuals. Methods to estimate the survival function can be classified in nonparametric and model-based methods and the main ones are described here.
REBORA, PAOLA, VALSECCHI, MARIA GRAZIA
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Cognitive functioning and survival in psychogeriatric patients

Acta Psychiatrica Scandinavica, 1991
The relationship between cognitive functioning and survival was studied among 92 people referred to a psychogeriatric assessment unit. A follow‐up 4–5 years later showed that the nonsurvivors initially had lower scores on the Mini‐Mental State Examination (MMSE) than the survivors.
S, Berg, L, Jeppson
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Survival and Function of Bioengineered Cardiac Grafts

Circulation, 1999
Introduction —Patients with congenital heart disease frequently require graft material for repair of cardiac defects. However, currently available grafts lack growth potential and are noncontractile and thrombogenic. We have developed a viable cardiac graft that contracts spontaneously in tissue culture by seeding cells derived
R K, Li, Z Q, Jia, R D, Weisel, D A, Mickle, A, Choi, T M, Yau   +5 more
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ON SMOOTH ESTIMATION OF SURVIVAL AND DENSITY FUNCTIONS

Statistics & Risk Modeling, 1996
Incorporating the Hille theorem, smooth estimators of survival and density functions are considered, and their (asymptotic) properties are studied in an unified manner. A comparative picture of the so-called kernel and nearest neighbor methods and the proposed one is presented with due emphasis on the (asymptotic) bias and mean square error criteria ...
Chaubey, Yogendra P., Sen, Pranab K.
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Prolonged and functional survival with the asplenia syndrome

The American Journal of Medicine, 1986
Asplenia syndrome is a rare congenital complex of splenic agenesis, cardiac malformation, and malposition of the abdominal viscera. Prolonged functional survival is very uncommon, with death usually caused by severe infection or congestive heart failure.
M W, Wolfe, J L, Vacek, R E, Kinard, C G, Bailey   +3 more
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FORM, FUNCTION, AND FITNESS: PATHWAYS TO SURVIVAL

Evolution, 2008
Two hypotheses have been considered in the literature regarding how anuran morphology reduces predation risk: by (1) improving escape swimming performance, or (2) using the tail as a lure to draw predator strikes away from the body of the tadpole. We investigated these hypotheses using a modification of the morphology, performance, and fitness path ...
Burt, Brent, Johnson, James B., DeWitt, Thomas J.   +2 more
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