Development and psychometric evaluation of the Endometriosis Treatment Satisfaction Questionnaire
ABSTRACT To develop and psychometrically evaluate the Endometriosis Treatment Satisfaction Questionnaire, a patient-reported assessment of satisfaction with endometriosis treatment.
The Endometriosis Treatment Satisfaction Questionnaire was developed based on the results of five focus groups and three iterative sets of cognitive interviews along with expert opinion and a review of the literature. The psychometric properties were assessed using data collected during a multicenter, randomized, proof-of-concept trial. The development and validation processes followed the guidance recommended by the United States FDA for patient-reported outcome instruments.
The Endometriosis Treatment Satisfaction Questionnaire's reliability, validity, and utility as a measure of patient satisfaction with their endometriosis treatment were supported. The results of the item-level analyses showed no evidence of distributional anomalies or response scale biases. The Endometriosis Treatment Satisfaction Questionnaire is unidimensional, has excellent internal consistency reliability, and discriminates well between known groups. Scores correlated well with other patient-reported outcome measures of endometriosis without being redundant.
The Endometriosis Treatment Satisfaction Questionnaire has utility for assessing patient satisfaction with endometriosis treatment and may be useful in clinical trials that are assessing new treatments for endometriosis, especially when deciding between competing treatments or regimens that are found to have similar tolerability and efficacy.
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ABSTRACT: 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. 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. 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. 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.Patient Preference and Adherence 05/2011; 5:239-50. DOI:10.2147/PPA.S19219 · 1.49 Impact Factor
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ABSTRACT: Endometriosis is prevalent and women need high-quality care, which should be patient-centered. This study aimed to develop a valid and reliable patient-centeredness questionnaire, based on a defined concept of patient-centered endometriosis care (PCEC). A literature review, focus groups (FGs) with patients and an expert panel defined PCEC with 10 dimensions. The ENDOCARE questionnaire (ECQ) was developed. FGs resulted in 43 specific statements covering the 10 dimensions of PCEC, for which the ECQ measured 'importance' and 'performance'. Medical and demographic questions and an open question were added. The Dutch ECQ questionnaire was piloted and reciprocally translated into English and Italian. Patients with endometriosis from Belgium, The Netherlands, Italy and the UK were invited to complete the ECQ online. Item analysis, inter-item analysis and confirmatory and exploratory factor analyses (EFA) and reliability analysis were performed. The theory-driven dimensions were adapted. The ECQ was completed by 541 patients. Based on item analysis, five statements were deleted. Factor analysis was performed on 322 questionnaires (only from respondents with a partner). Insights from the data-driven EFA suggested adaptations of the theory-driven dimensions. The reliability statistics of 9/10 adapted theory-driven dimensions were satisfactory and the root mean square error of approximation was good. This study resulted in a valid and reliable instrument to measure PCEC. For data presentation, the adapted theory-driven dimensions of PCEC are preferred over the data-driven factors. The ECQ may serve to benchmark patient-centeredness, conduct cross-cultural European research and set targets for improvement.Human Reproduction 09/2011; 26(11):2988-99. DOI:10.1093/humrep/der277 · 4.59 Impact Factor
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ABSTRACT: BACKGROUND: Satisfaction with treatment is a patient-reported outcome shown to be associated with the patient's health-related decisions and treatment-related behavior, thereby influencing the chances of successful treatment, and is especially relevant in long-term treatment, such as allergen-specific immunotherapy (AIT). OBJECTIVE: We sought to assess the psychometric properties of the Satisfaction Scale for Patients Receiving Allergen Immunotherapy (ESPIA) questionnaire so as to determine the satisfaction of patients receiving AIT treatment. METHODS: An observational, longitudinal, multicenter study was performed on patients with allergic rhinitis (AR) undergoing AIT treatment. Sociodemographic, clinical, and patient-centered health outcomes data were gathered at the study visits. Feasibility, reliability, validity, and sensitivity to change of the prevalidated version of the ESPIA questionnaire were assessed. RESULTS: Four hundred twenty-nine patients were included (52.2% women, 33.6 years of age, 54.5% of the cases with intermittent AR and 62.5% with moderate AR). Low levels of missing items and ceiling/floor effects were found for the overall score of the ESPIA questionnaire. The overall Cronbach α value and intraclass correlation coefficient were 0.90 and 0.92, respectively. The overall score for the ESPIA questionnaire was strongly associated with months receiving AIT, AR type and intensity, presence of conjunctivitis, self-perceived health status, effect of AR on daily life, and expectations about the AIT treatment. The pattern of correlations obtained with other patient-centered health outcomes was consistent with expectations. The ESPIA questionnaire also showed good sensitivity to change for improved health status. CONCLUSION: The ESPIA questionnaire to assess patient satisfaction with respect to AIT treatment presented satisfactory psychometric properties for its use in clinical practice.The Journal of allergy and clinical immunology 01/2013; 131(6). DOI:10.1016/j.jaci.2012.11.049 · 11.25 Impact Factor