Michael E. Hyland|Rupert Jones|Joseph W. Lanario|Matthew Masoli
The construction and validation of the Severe Asthma Questionnaire
University Hospitals Plymouth NHS Trust|University of Plymouth|University of Plymouth|University Hospitals Plymouth NHS Trust|University of Plymouth|University Hospitals Plymouth NHS Trust|University Hospitals Plymouth NHS Trust
us food drug administrations procedure scale validation requires documented stepwise process qualitative quantitative data aim paper provide final quantitative validating data severe asthma questionnaire saqthe saq asthma control test mini asthma quality life questionnaire eq5d5l completed 160 patients attending severe asthma clinic 51 patients completed saq two occasions testretest reliability analysis saq produces two scores saq score based average 16 items saqglobal score single 100point global quality life scaleconstruct validity demonstrated factor analysis 16 items convergent validity correlations 06 saq saqglobal questionnaires discriminant validity ability saq saqglobal distinguish different treatment levels testretest reliability intraclass correlation 093 saq 093 saqglobal alpha coefficient saq 093the saq developed using recommended qualitative quantitative procedures scale development used gain insight patients perceptions severe asthma treatment affects lives