Assessing the impact of additional follow-up in cohort studies.
Am J Epidemiol
; 121(4): 611-9, 1985 Apr.
Article
em En
| MEDLINE
| ID: mdl-4014150
ABSTRACT
An approach is described for predicting the statistical value of extending follow-up in a cohort study. A simple approximation to the expected number of new events of interest is given. The effect of these events on inferences for parameters such as a standardized mortality ratio is approached in two ways. The first concerns the probability of reversing the conclusion of a significance test. The second approach finds the plausible range of values for the standardized mortality ratio after further follow-up that are consistent with the currently available data. Each of these values is displayed together with the precision of the estimate. The methods are illustrated with results from the International Radiation Study of Cervical Cancer (IARC Scientific Publication No. 52, 1984).
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Base de dados:
MEDLINE
Assunto principal:
Neoplasias do Colo do Útero
/
Biometria
Tipo de estudo:
Etiology_studies
/
Observational_studies
/
Prognostic_studies
/
Risk_factors_studies
Limite:
Female
/
Humans
Idioma:
En
Ano de publicação:
1985
Tipo de documento:
Article