Development and psychometric evaluation of the self-assessment of psoriasis symptoms (SAPS) - clinical trial and the SAPS - real world patient-reported outcomes.
J Dermatolog Treat
; 28(6): 505-514, 2017 Sep.
Article
en En
| MEDLINE
| ID: mdl-28147886
ABSTRACT
OBJECTIVE:
The Self-Assessment of Psoriasis Symptoms - Clinical Trials (SAPS-CT) and SAPS - Real World (SAPS-RW) were simultaneously created to assess the experience of plaque psoriasis in two unique contexts.METHODS:
Qualitative and quantitative research was conducted in four phases namely concept elicitation, questionnaire construction, content evaluation and psychometric evaluation.RESULTS:
Following concept elicitation, 18 concepts were selected to inform questionnaire construction of the SAPS-CT and SAPS-RW. To accommodate each context of use, the SAPS-CT asks respondents to rate the target symptom 'at its worst' in the 24 h prior to assessment, while the SAPS-RW asks respondents to rate the target symptom "on average" in the 7 days prior to assessment. Cognitive debriefing confirmed that patients could comprehend and provide meaningful responses to both versions and, after minor modifications, resulted in 11-item questionnaires administered in an observational study (N = 200). Results from the observational study informed further item reduction (SAPS-RW to six items and SAPS-CT to nine items) and demonstrated that scores from each were reliable (Cronbach's α > 0.90, test-retest intraclass correlation coefficient >0.70), construct valid and able to differentiate among clinically distinct groups.CONCLUSION:
The SAPS-CT and SAPS-RW are content-valid PRO questionnaires capable of producing psychometrically sound scores when administered chronic to plaque psoriasis patients.Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Psoriasis
/
Psicometría
/
Autoevaluación (Psicología)
/
Medición de Resultados Informados por el Paciente
Tipo de estudio:
Clinical_trials
/
Diagnostic_studies
/
Observational_studies
/
Qualitative_research
Límite:
Adult
/
Aged
/
Female
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Humans
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Male
/
Middle aged
Idioma:
En
Revista:
J Dermatolog Treat
Asunto de la revista:
DERMATOLOGIA
Año:
2017
Tipo del documento:
Article
País de afiliación:
Estados Unidos