Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    Application of a Frailty Modeling Approach to Correlated Breastfeeding Duration Data

    Access Status
    Fulltext not available
    Authors
    Zhao, J.
    Zhao, Yun
    Khanal, V.
    Lee, A.
    Lee, Andy
    Date
    2018
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Zhao, J. and Zhao, Y. and Khanal, V. and Lee, A. and Lee, A. 2018. Application of a Frailty Modeling Approach to Correlated Breastfeeding Duration Data. Nursing Research. 67 (6): pp. 485-489.
    Source Title
    Nursing Research
    DOI
    10.1097/NNR.0000000000000311
    ISSN
    0029-6562
    School
    School of Public Health
    URI
    http://hdl.handle.net/20.500.11937/72151
    Collection
    • Curtin Research Publications
    Abstract

    © Wolters Kluwer Health, Inc. All rights reserved. Background Correlated breastfeeding duration data are very common in infant feeding research using cohort designs. Intracluster correlation within the same clustering group is expected and needs to be taken into account in statistical analysis; otherwise, the corresponding statistical inferences may be subject to an increased Type I error. Objectives The aims of this study were to illustrate the necessity of adjusting for the intracluster correlation in correlated breastfeeding duration data analysis and to demonstrate different frailty modeling approaches. Methods An introduction to shared frailty models was presented under the assumption of proportional hazards (PH). Then, two different approaches-the Cox frailty model (semiparametric approach) and the parametric frailty model (parametric approach)-were used to fit the data from a maternal cohort in Nepal as an illustrative example. Results For the semiparametric approach, random effects denoting the variations in the hazard of breastfeeding cessation shared by mothers living in the 27 distinct communities were estimated and graphically presented. Compared with the conventional Cox model, Cox frailty model reduced the chance of Type I error occurring, providing a better model fit in the presence of correlated survival data. Among candidate parametric approaches, a Weibull PH model with a gamma frailty term was selected as an appropriate model fitting the breastfeeding data. Discussion Shared frailty models can be used in other research areas in the presence of correlated time-To-event data. Model selection depends on the assumption of PH, the specification of the baseline hazard function, and also the study purpose.

    Related items

    Showing items related by title, author, creator and subject.

    • Breastfeeding and perceptions of breast shape changes in Australian and Japanese women
      Inoue, Madoka (2012)
      This thesis examines infant feeding practices, including knowledge and attitudes towards breastfeeding, factors that influence the duration of breastfeeding, and breastfeeding outcomes in relation to postpartum women’s ...
    • Statistical Modelling of Breastfeeding Data
      Zhao, Jian (2018)
      This thesis addresses some key methodological problems in statistical modelling of breastfeeding data. Meta-analysis techniques were used to analyse aggregated breastfeeding data. Generalised linear mixed model and an ...
    • Comparison of breastfeeding knowledge and attitudes of selected adolescent males and females from rural and metropolitan secondary schools
      Juliff, Dianne Therese (2005)
      Research has indicated that adolescents hold both negative and positive attitudes and have common misconceptions about breastfeeding that appear to result from their limited knowledge and reduced exposure to breastfeeding. ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.