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Scoring and psychometric properties of the Eye-Drop Satisfaction Questionnaire (EDSQ), an instrument to assess satisfaction and compliance with glaucoma treatment.
BMC Ophthalmol. 2010 Feb 01; 10:1.BO

Abstract

BACKGROUND

The objective of this study was to ascertain the scoring and assess the psychometric properties of the Eye-Drop Satisfaction Questionnaire (EDSQ), a 43-item Patient-Reported Outcome instrument developed to assess patients' satisfaction and compliance with glaucoma treatment.

METHODS

The EDSQ was administered during an observational, retrospective study to 184 French patients treated for glaucoma. The hypothesized structure, including six dimensions (patient-clinician relationship; patient experience; patient-treatment interaction; apprehension; patient knowledge; travel), was tested by assessing the internal consistency reliability (Cronbach's alpha) and construct-related validity (item convergent and discriminant validity). As unsatisfactory results were demonstrated, another structure was defined using a principal component analysis (PCA) combined with content of items. Psychometric properties of this new structure were assessed. Scores were compared between low, moderate and high compliance profile groups defined using data collected with the Travalert electronic device.

RESULTS

Analyses were performed with the 169 patients who completed at least half of the EDSQ items. The hypothesized structure showed a Cronbach's alpha lower than 0.70 for four dimensions out of six and an overall poor construct-related validity (range of item-scale correlations: 0.00-0.68). The new structure obtained with the PCA included six dimensions: concern about treatment (five items); concern about disease (two items); satisfaction with patient-clinician relationship (five items); positive beliefs (three items); treatment convenience (three items); and self-declared compliance (three items). A score ranging from 0 to 100 was calculated for each dimension, with higher scores indicating more of the attribute referred to in the dimension. Internal consistency reliability was good (Cronbach's alpha greater than 0.70 for five dimensions). The structure offered good construct-related validity (range of item-scale correlations: 0.36-0.82). Ceiling effects of 21% and 49%, were observed for the satisfaction with patient-clinician relationship and self-declared compliance scores. Patients in low compliance profile group reported the lowest score for the satisfaction with patient-clinician relationship, positive beliefs, treatment convenience and self-declared compliance dimensions, and the highest score for the concern about treatment dimension.

CONCLUSIONS

The scoring of the EDSQ was developed and the questionnaire proved to have satisfactory psychometric properties. EDSQ scores showed a promising relationship to compliance profiles. The EDSQ could be used in future studies.

Authors+Show Affiliations

Mapi Values, Lyon, France. antoine.regnault@mapivalues.comNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Multicenter Study
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

20122146

Citation

Regnault, Antoine, et al. "Scoring and Psychometric Properties of the Eye-Drop Satisfaction Questionnaire (EDSQ), an Instrument to Assess Satisfaction and Compliance With Glaucoma Treatment." BMC Ophthalmology, vol. 10, 2010, p. 1.
Regnault A, Viala-Danten M, Gilet H, et al. Scoring and psychometric properties of the Eye-Drop Satisfaction Questionnaire (EDSQ), an instrument to assess satisfaction and compliance with glaucoma treatment. BMC Ophthalmol. 2010;10:1.
Regnault, A., Viala-Danten, M., Gilet, H., & Berdeaux, G. (2010). Scoring and psychometric properties of the Eye-Drop Satisfaction Questionnaire (EDSQ), an instrument to assess satisfaction and compliance with glaucoma treatment. BMC Ophthalmology, 10, 1. https://doi.org/10.1186/1471-2415-10-1
Regnault A, et al. Scoring and Psychometric Properties of the Eye-Drop Satisfaction Questionnaire (EDSQ), an Instrument to Assess Satisfaction and Compliance With Glaucoma Treatment. BMC Ophthalmol. 2010 Feb 1;10:1. PubMed PMID: 20122146.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Scoring and psychometric properties of the Eye-Drop Satisfaction Questionnaire (EDSQ), an instrument to assess satisfaction and compliance with glaucoma treatment. AU - Regnault,Antoine, AU - Viala-Danten,Muriel, AU - Gilet,Hélène, AU - Berdeaux,Gilles, Y1 - 2010/02/01/ PY - 2009/02/27/received PY - 2010/02/01/accepted PY - 2010/2/4/entrez PY - 2010/2/4/pubmed PY - 2010/6/4/medline SP - 1 EP - 1 JF - BMC ophthalmology JO - BMC Ophthalmol VL - 10 N2 - BACKGROUND: The objective of this study was to ascertain the scoring and assess the psychometric properties of the Eye-Drop Satisfaction Questionnaire (EDSQ), a 43-item Patient-Reported Outcome instrument developed to assess patients' satisfaction and compliance with glaucoma treatment. METHODS: The EDSQ was administered during an observational, retrospective study to 184 French patients treated for glaucoma. The hypothesized structure, including six dimensions (patient-clinician relationship; patient experience; patient-treatment interaction; apprehension; patient knowledge; travel), was tested by assessing the internal consistency reliability (Cronbach's alpha) and construct-related validity (item convergent and discriminant validity). As unsatisfactory results were demonstrated, another structure was defined using a principal component analysis (PCA) combined with content of items. Psychometric properties of this new structure were assessed. Scores were compared between low, moderate and high compliance profile groups defined using data collected with the Travalert electronic device. RESULTS: Analyses were performed with the 169 patients who completed at least half of the EDSQ items. The hypothesized structure showed a Cronbach's alpha lower than 0.70 for four dimensions out of six and an overall poor construct-related validity (range of item-scale correlations: 0.00-0.68). The new structure obtained with the PCA included six dimensions: concern about treatment (five items); concern about disease (two items); satisfaction with patient-clinician relationship (five items); positive beliefs (three items); treatment convenience (three items); and self-declared compliance (three items). A score ranging from 0 to 100 was calculated for each dimension, with higher scores indicating more of the attribute referred to in the dimension. Internal consistency reliability was good (Cronbach's alpha greater than 0.70 for five dimensions). The structure offered good construct-related validity (range of item-scale correlations: 0.36-0.82). Ceiling effects of 21% and 49%, were observed for the satisfaction with patient-clinician relationship and self-declared compliance scores. Patients in low compliance profile group reported the lowest score for the satisfaction with patient-clinician relationship, positive beliefs, treatment convenience and self-declared compliance dimensions, and the highest score for the concern about treatment dimension. CONCLUSIONS: The scoring of the EDSQ was developed and the questionnaire proved to have satisfactory psychometric properties. EDSQ scores showed a promising relationship to compliance profiles. The EDSQ could be used in future studies. SN - 1471-2415 UR - https://www.unboundmedicine.com/medline/citation/20122146/Scoring_and_psychometric_properties_of_the_Eye_Drop_Satisfaction_Questionnaire__EDSQ__an_instrument_to_assess_satisfaction_and_compliance_with_glaucoma_treatment_ L2 - https://bmcophthalmol.biomedcentral.com/articles/10.1186/1471-2415-10-1 DB - PRIME DP - Unbound Medicine ER -