Skip to main content Accessibility help
×
Home
Hostname: page-component-544b6db54f-jcwnq Total loading time: 0.233 Render date: 2021-10-23T02:21:16.215Z Has data issue: true Feature Flags: { "shouldUseShareProductTool": true, "shouldUseHypothesis": true, "isUnsiloEnabled": true, "metricsAbstractViews": false, "figures": true, "newCiteModal": false, "newCitedByModal": true, "newEcommerce": true, "newUsageEvents": true }

5 - Multilevel modelling

Published online by Cambridge University Press:  26 March 2010

Jos W. R. Twisk
Affiliation:
Vrije Universiteit, Amsterdam
Get access

Summary

Introduction

Up to now, the explanation of the principles of multilevel analysis has been limited to simple analysis. In this chapter, the models to be analysed will be extended with some covariates. Let us go back to the result of one of the analyses performed in Chapter 2 (see Output 2.5). In this analysis a two-level structure was considered, in such a way that patients were clustered within medical doctors (see Figure 2.4), and the relationship between age and total cholesterol was investigated. The independent age variable was centred in order to facilitate the interpretation of the (variance of the random) intercept when a random slope for age was allowed. The example with age centred is chosen as a starting point because the magnitude of the variance of the random intercept is going to be used in the next part of this section. The conclusion of the analysis performed in Chapter 2 was that there was a highly significant positive relationship between age and total cholesterol. It was further shown that in the two-level data structure in which the patients were only clustered within the medical doctors, the ‘best’ way to analyse this relationship was a model with a random intercept as well as a random slope for age at the medical doctor level. Output 5.1 shows (again) the results of this analysis, which is used as starting point for the explanation of multilevel modelling.

Type
Chapter
Information
Applied Multilevel Analysis
A Practical Guide for Medical Researchers
, pp. 62 - 85
Publisher: Cambridge University Press
Print publication year: 2006

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)
2
Cited by

Send book to Kindle

To send this book to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle.

Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

  • Multilevel modelling
  • Jos W. R. Twisk, Vrije Universiteit, Amsterdam
  • Book: Applied Multilevel Analysis
  • Online publication: 26 March 2010
  • Chapter DOI: https://doi.org/10.1017/CBO9780511610806.006
Available formats
×

Send book to Dropbox

To send content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about sending content to Dropbox.

  • Multilevel modelling
  • Jos W. R. Twisk, Vrije Universiteit, Amsterdam
  • Book: Applied Multilevel Analysis
  • Online publication: 26 March 2010
  • Chapter DOI: https://doi.org/10.1017/CBO9780511610806.006
Available formats
×

Send book to Google Drive

To send content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about sending content to Google Drive.

  • Multilevel modelling
  • Jos W. R. Twisk, Vrije Universiteit, Amsterdam
  • Book: Applied Multilevel Analysis
  • Online publication: 26 March 2010
  • Chapter DOI: https://doi.org/10.1017/CBO9780511610806.006
Available formats
×