Document Detail

A discrete survival model with random effects: an application to time to pregnancy.
MedLine Citation:
PMID:  9147597     Owner:  NLM     Status:  MEDLINE    
Time to pregnancy, the number of menstrual cycles it takes a couple to conceive, and various covariates have been collected among couples ultimately achieving conception. To assess the influence of the covariates, we constructed a discrete survival model that allows time-dependent covariates. A random effect was included to account for unobserved heterogeneity. The collected waiting times are obtained through retrospective ascertainment and are analyzed as truncated data. Maximum likelihood estimation was implemented by Fisher scoring through iteratively reweighted least squares.
T H Scheike; T K Jensen
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Biometrics     Volume:  53     ISSN:  0006-341X     ISO Abbreviation:  Biometrics     Publication Date:  1997 Mar 
Date Detail:
Created Date:  1997-05-12     Completed Date:  1997-05-12     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0370625     Medline TA:  Biometrics     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  318-29     Citation Subset:  IM    
Department of Biostatistics, University of Copenhagen, Denmark.
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MeSH Terms
Contraceptives, Oral
Likelihood Functions
Models, Biological*
Models, Statistical*
Time Factors
Reg. No./Substance:
0/Contraceptives, Oral

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