PDF4PRO ⚡AMP

Modern search engine that looking for books and documents around the web

Example: marketing

Chapter 1 Longitudinal Data Analysis

Themostcommonmedicalresearch designsis a \pre-post"studyinwhich a singlebaselinehealthstatusmeasurement is obtained,aninterven-tionis administered,anda singlefollow-upmeasurement is theoutcomemeasurement canbe as-sociatedwiththechangein example,if somesubjectsaregivenplacebo whileothersaregivenanactive drug,thetwogroupscanbe comparedto seeif thechangein theoutcomeis di erent forthosesubjectswhoareactivelytreatedas comparedto viewed as thesimplestformof a prospective nition: Alongitudinalstudyrefersto aninvestigationwherepartici-pant outcomesandpossiblytreatments or exposuresarecollectedat longitudinalstudygenerallyyieldsmultiple or \repeated"measurementsoneach example,HIVpatients may be followedover timeandmonthlymeasuressuch as CD4counts,or viralloadarecollectedto charac-terizeimmunestatusanddiseaseburde nrespectively. Such repeatedmea-suresdataarecorrelatedwithin subjectsandthus secondimportant outcomethatis commonlymeasuredin a longitudinalstudyis thetimeuntil a key clinicalevent such as diseaserecurrenceor LONGITUDINALDATA ANALYSISA nalysisof event timeendpoints is thefocusofsurvivalanalysiswhich iscoveredin Chapter ?

Chapter 1 Longitudinal Data Analysis 1.1 Introduction One of the most common medical research designs is a \pre-post" study in which a single baseline health status measurement is obtained, an interven-tion is administered, and a single follow-up measurement is collected. In this experimental design the change in the outcome measurement can be as-

Loading..

Tags:

  Analysis, Design, Data, Chapter, Longitudinal, Chapter 1 longitudinal data analysis

Information

Domain:

Source:

Link to this page:

Please notify us if you found a problem with this document:

Spam in document Broken preview Other abuse

Transcription of Chapter 1 Longitudinal Data Analysis

Related search queries