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Development of a questionnaire to assess patient satisfaction with allergen-specific immunotherapy in adults: item generation, item reduction, and preliminary validation.

Justícia JL, Baró E, Cardona V, Guardia P, Ojeda P, Olaguíbel JM, Vega JM, Vidal C - Patient Prefer Adherence (2011)

Bottom Line: Ceiling and floor effects were negligible for overall score.Overall score was associated with the type and intensity of symptoms.This is the first attempt to develop a satisfaction with SIT measure from the perspective of the allergic patient, and evidence has been found in favor of its reliability and validity.

View Article: PubMed Central - PubMed

Affiliation: Medical Department, Stallergenes Ibérica, Barcelona, Spain;

ABSTRACT

Background: Allergen-specific immunotherapy (SIT) is a treatment capable of modifying the natural course of allergy, so ensuring good adherence to SIT is fundamental. Up until now there has not existed an instrument specifically developed to measure patient satisfaction with SIT, although its assessment could help us to comprehend better and improve treatment adherence and effectiveness. The aim of this study was to develop an instrument to measure adult patient satisfaction with SIT.

Methods: Items were generated from a literature review, focus groups with allergic adult patients undergoing SIT, and a meeting with experts. Potential items were administered to allergic patients undergoing SIT in an observational, cross-sectional, multicenter study. Item reduction was based on quantitative and qualitative criteria. A preliminary assessment of feasibility, reliability, and validity of the retained items was performed.

Results: An initial pool of 70 items was administered to 257 patients undergoing SIT. Fifty-four items were eliminated resulting in a provisional instrument with 16 items. Factor analysis yielded four factors that were identified as perceived efficacy, activities and environment, cost-benefit balance, and overall satisfaction, explaining 74.8% of variance. Ceiling and floor effects were negligible for overall score. Overall score was associated with the type and intensity of symptoms.

Conclusion: This is the first attempt to develop a satisfaction with SIT measure from the perspective of the allergic patient, and evidence has been found in favor of its reliability and validity.

No MeSH data available.


Overview of study procedures.
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Related In: Results  -  Collection


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f1-ppa-5-239: Overview of study procedures.

Mentions: The three main phases of the project consisted of item generation, item reduction with data collected in a first field-work study, and an exhaustive assessment of the psychometric properties of the questionnaire’s final version, with data collected in subsequent field work. This paper reports the main results of the first two steps of the overall project (Figure 1).


Development of a questionnaire to assess patient satisfaction with allergen-specific immunotherapy in adults: item generation, item reduction, and preliminary validation.

Justícia JL, Baró E, Cardona V, Guardia P, Ojeda P, Olaguíbel JM, Vega JM, Vidal C - Patient Prefer Adherence (2011)

Overview of study procedures.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3105877&req=5

f1-ppa-5-239: Overview of study procedures.
Mentions: The three main phases of the project consisted of item generation, item reduction with data collected in a first field-work study, and an exhaustive assessment of the psychometric properties of the questionnaire’s final version, with data collected in subsequent field work. This paper reports the main results of the first two steps of the overall project (Figure 1).

Bottom Line: Ceiling and floor effects were negligible for overall score.Overall score was associated with the type and intensity of symptoms.This is the first attempt to develop a satisfaction with SIT measure from the perspective of the allergic patient, and evidence has been found in favor of its reliability and validity.

View Article: PubMed Central - PubMed

Affiliation: Medical Department, Stallergenes Ibérica, Barcelona, Spain;

ABSTRACT

Background: Allergen-specific immunotherapy (SIT) is a treatment capable of modifying the natural course of allergy, so ensuring good adherence to SIT is fundamental. Up until now there has not existed an instrument specifically developed to measure patient satisfaction with SIT, although its assessment could help us to comprehend better and improve treatment adherence and effectiveness. The aim of this study was to develop an instrument to measure adult patient satisfaction with SIT.

Methods: Items were generated from a literature review, focus groups with allergic adult patients undergoing SIT, and a meeting with experts. Potential items were administered to allergic patients undergoing SIT in an observational, cross-sectional, multicenter study. Item reduction was based on quantitative and qualitative criteria. A preliminary assessment of feasibility, reliability, and validity of the retained items was performed.

Results: An initial pool of 70 items was administered to 257 patients undergoing SIT. Fifty-four items were eliminated resulting in a provisional instrument with 16 items. Factor analysis yielded four factors that were identified as perceived efficacy, activities and environment, cost-benefit balance, and overall satisfaction, explaining 74.8% of variance. Ceiling and floor effects were negligible for overall score. Overall score was associated with the type and intensity of symptoms.

Conclusion: This is the first attempt to develop a satisfaction with SIT measure from the perspective of the allergic patient, and evidence has been found in favor of its reliability and validity.

No MeSH data available.