title: Logistic regression for risk factor modelling in stuttering research.
abstract: OBJECTIVE
  To outline the uses of logistic regression and other statistical methods for risk factor analysis in the context of research on stuttering.
  
  
  METHODS
  The principles underlying the application of a logistic regression are illustrated, and the types of questions to which such a technique has been applied in the stuttering field are outlined. The assumptions and limitations of the technique are discussed with respect to existing stuttering research, and with respect to formulating appropriate research strategies to accommodate these considerations. Finally, some alternatives to the approach are briefly discussed.
  
  
  RESULTS
  The way the statistical procedures are employed are demonstrated with some hypothetical data.
  
  
  CONCLUSIONS
  Research into several practical issues concerning stuttering could benefit if risk factor modelling were used. Important examples are early diagnosis, prognosis (whether a child will recover or persist) and assessment of treatment outcome.
  
  
  OBJECTIVE
  After reading this article you will: (a) Summarize the situations in which logistic regression can be applied to a range of issues about stuttering; (b) Follow the steps in performing a logistic regression analysis; (c) Describe the assumptions of the logistic regression technique and the precautions that need to be checked when it is employed; (d) Be able to summarize its advantages over other techniques like estimation of group differences and simple regression.
authors.affiliation: Department of Psychology, Swansea University, Singleton Park, Swansea SA2 8PP, UK. p.reed@swansea.ac.uk
authors.forename: Phil
authors.initials: P
authors.lastname: Reed
authors.forename: Yaqionq
authors.initials: Y
authors.lastname: Wu
mesh_terms: D006801:Humans; D016015:Logistic Models; D015233:Models, Statistical; D011379:Prognosis; D012307:Risk Factors; D013342:Stuttering / Q000175:diagnosis / Q000209:etiology* / Q000628:therapy; D016896:Treatment Outcome