A Turkish Version of Myocardial Infarction Dimensional Assessment Scale (TR-MIDAS): Reliability–Validity Assesment

A Systematic Review and Quality Assessment of Cardiovascular Disease-Specific Health-Related Quality-of-Life Instruments Part I: Instrument Development and Content Validity

OBJECTIVES

Health-related quality-of-life (HRQoL) instruments for cardiovascular diseases (CVD) have been commonly used to measure important patient-reported outcomes (PROs) in clinical trials and practices. This study aimed at systematically identifying and assessing the content validity of CVD-specific HRQoL instruments in clinical studies.

METHODS

The research team searched Cumulative Index to Nursing and Allied Health Literature, Embase, and PubMed from inception to January 20, 2022. The research team included studies that reported the development and content validity for CVD-specific instruments. Two reviewers independently assessed the methodological quality using the Consensus-based Standards for the Selection of Health Measurement Instruments methods on evaluating content validity of PROs. Content analysis was used to categorize the items included in the instruments.

RESULTS

The research team found 69 studies reporting the content validity of 40 instruments specifically developed for CVD. Fourteen (35.0%) were rated "sufficient" with very low to moderate quality of evidence. For PRO development, all instruments were rated "doubtful" or "inadequate." Twenty-eight (70.0%) instruments cover the core concepts of HRQoL.

CONCLUSIONS

The quality of development and content validity vary among existing CVD-specific instruments. The evidence on the content validity should be considered when choosing a HRQoL instrument in CVD clinical studies and health economic evaluations.

Translation and psychometric testing of the Farsi version of the Seattle angina questionnaire

Background

Angina pectoris causes substantial psychological and functional disabilities and adversely effects quality of life in patients. The aim of this study was to investigate the psychometric properties including validity and reliability of the Farsi version of the Seattle angina questionnaire.

Methods

The ‘forward-backward’ procedure was applied to translate this questionnaire from English to Farsi. The translated version of the Seattle angina questionnaire was assessed in terms of validity and reliability with a convenience sample of 200 patients suffering from angina pectoris who were recruited from the inpatient ward (post CCU) and outpatient department at two teaching hospitals in an urban area of Iran. Validity was assessed using content, face and construct validity. The calculation of the Cronbach’s alpha coefficient and the test-retest method helped with the assessment of reliability of the questionnaire’s five subscales. Construct validity of the questionnaire was evaluated using exploratory factor analysis.

Results

The results of exploratory factor analysis indicated a five-factor solution for the questionnaire including ‘physical limitation in middle to strenuous activities’, ‘physical limitation in slight activities’, ‘angina pattern and discomfort of treatment’, ‘treatment satisfaction’ and ‘disease perception’ that jointly accounted for 64.42% of variance observed. Convergent validity was mostly supported by the pattern of association between the Seattle angina questionnaire-Farsi version and the SF-36. Cronbach’s alpha of the subscales ranged from 0.60 to 0.86 and test-retest scores ranged from 0.79 to 0.97 indicating a good range of reliability.

Conclusions

The Seattle angina questionnaire-Farsi version had acceptable psychometric properties. Therefore, it can be used to assess health-related quality of life and assess the effects of different medical and nursing interventions on patients’ quality of life.

Psychometric properties of the Farsi version of the Myocardial Infarction Dimensional Assessment Scale

Assessment of quality of life is an important measure of the impact of disease and effectiveness of treatment. The Myocardial Infarction Dimensional Assessment Scale (MIDAS) is a disease-specific questionnaire developed for the evaluation of health-related quality of life in patients following myocardial infarction. The purpose of this study was to determine the psychometric properties of the Farsi version of MIDAS. The translated MIDAS was checked for validity and reliability with 350 patients who had suffered a myocardial infarction within the last 90 days. Participants were recruited from five inpatient wards and two outpatient departments at four university hospitals in Tehran between June 2013 and March 2014. Exploratory factor analysis indicated a six-factor solution for the questionnaire: ‘physical activity’, ‘insecurity’, ‘emotional reaction’, ‘dependency’, ‘diet’, and ‘concerns over medication and side effects’. Together, these accounted for 81.63% of variance observed. Cronbach’s alpha of the subscales ranged from 0.88 to 0.98, and test–retest reliability intraclass correlation coefficients ranged from .81 to .97, indicating that the instrument was reliable. The Farsi version of the MIDAS was reliable and valid for Iranian patients with myocardial infarction. The MIDAS can be used to measure health outcomes in different clinical settings and research centres, and by nurses for measuring health-related quality of life and determining the effects of medical and nursing interventions on patients’ quality of life.

The effect of individual training and counselling programme for patients with myocardial infarction over patients' quality of life

The aim of the present study was to identify the effect of individual training and counselling programme for patients having experienced myocardial infarction over patients' quality of life. The sample was composed of 90 patients, 45 in the intervention and 45 in the control group, selected by sequential sampling from patients who had myocardial infarction for the first time. Data were collected between April and November 2008 by means of patient information form, Myocardial Infarction Dimensional Assessment Scale MIDAS, and Short Form SF-36. In the intervention group, more improvement was observed in comparison with the control group in terms of quitting smoking, physical activity, body mass index, waist circumference (mean differences P = 0.000). A significant difference was observed in the third month of evaluation of both MIDAS and SF-36 quality of life scales in comparison with the baseline values (P ≤ 0.000). The results indicated that individual training and counselling provided to patients having experienced acute myocardial infarction lead to improvement in quality of life and decrease risk factors by increasing behaviours that protect cardiac health. Such educational programmes should be applied to patients with acute myocardial infarction prior to discharge.