Fletcher, Kenneth E <br/><br/>
A prospective global measure, the Punum Ladder, provides more valid assessments of quality of life than a retrospective transition measure.  [electronic resource] 

 -  Journal of clinical epidemiology  Oct 2010 
 - 1123-31 p.  digital 
<br/><br/> Publication Type: Journal Article; Validation Study 
<br/><br/><label>ISSN: </label>1878-5921 
<br/><br/><label>Standard No.: </label>10.1016/j.jclinepi.2009.09.015  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Adult<br/>Aged<br/>Algorithms<br/>Analysis of Variance<br/>Chronic Disease<br/>Cough--epidemiology<br/>Female<br/>Health Status Indicators<br/>Humans<br/>Male<br/>Middle Aged<br/>Prospective Studies<br/>Psychometrics<br/>Quality of Life--psychology<br/>Reproducibility of Results<br/>Surveys and Questionnaires<br/>United States--epidemiology