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Determining known-group validity and test-retest reliability in the PEQ (personalized exercise questionnaire).

ABSTRACT: BACKGROUND:To determine the known-group validity, a type of construct validity, and the test-retest reliability of a newly developed tool, the Personalized Exercise Questionnaire (PEQ), that assesses the barriers, facilitators, and preferences to exercise in individuals with low bone mass and osteoporosis. METHODS:A comparative design was used to assess known-group validity and a test-retest design to examine the reproducibility. Ninety-five participants with low bone mass and osteoporosis were recruited from an outpatient clinic in Hamilton, Ontario. The questionnaire was administered to 95 participants at baseline and a subset of 42 participants completed the survey again one week later. The known-group validity of the PEQ was determined using four hypotheses that compared two known groups based on employment level, age, socioeconomic status, and physical activity level. The reproducibility of individual responses was analyzed using the Kappa Coefficient (?). RESULTS:There was known-group validity for three of the four hypotheses. Test-retest reliability scores ranged from no agreement to almost perfect agreement; seven items had almost perfect agreement (?: 0.81-1.00), 12 substantial agreement (?: 0.68-0.74), six moderate agreement (?: 0.56-0.60), two fair agreement (?: 0.36-0.40), one slight agreement (??=?0.23) and one no agreement (??=?-?0.03). CONCLUSION:Preliminary support for the usefulness of the PEQ is indicated since the majority of the items had at least substantial agreement and known-group validity was moderately supported for some items. TRIAL REGISTRATION:This study was retrospectively registered with ClinicalTrials.gov , NCT03125590, on April 24, 2017.

SUBMITTER: Rodrigues IB

PROVIDER: S-EPMC6694546 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature

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Determining known-group validity and test-retest reliability in the PEQ (personalized exercise questionnaire).

Rodrigues Isabel B IB Adachi Jonathan D JD Beattie Karen A KA Lau Arthur A MacDermid Joy C JC

BMC musculoskeletal disorders 20190814 1

<h4>Background</h4>To determine the known-group validity, a type of construct validity, and the test-retest reliability of a newly developed tool, the Personalized Exercise Questionnaire (PEQ), that assesses the barriers, facilitators, and preferences to exercise in individuals with low bone mass and osteoporosis.<h4>Methods</h4>A comparative design was used to assess known-group validity and a test-retest design to examine the reproducibility. Ninety-five participants with low bone mass and ost ...[more]

PMID: 31412834

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Project description:Objective(i) To develop the Pharmacy Value-Added Services Questionnaire (PVASQ) using emerging themes generated from interviews. (ii) To establish reliability and validity of questionnaire instrument.MethodsUsing an extended Theory of Planned Behavior as the theoretical model, face-to-face interviews generated salient beliefs of pharmacy value-added services. The PVASQ was constructed initially in English incorporating important themes and later translated into the Malay language with forward and backward translation. Intention (INT) to adopt pharmacy value-added services is predicted by attitudes (ATT), subjective norms (SN), perceived behavioral control (PBC), knowledge and expectations. Using a 7-point Likert-type scale and a dichotomous scale, test-retest reliability (N=25) was assessed by administrating the questionnaire instrument twice at an interval of one week apart. Internal consistency was measured by Cronbach's alpha and construct validity between two administrations was assessed using the kappa statistic and the intraclass correlation coefficient (ICC). Confirmatory Factor Analysis, CFA (N=410) was conducted to assess construct validity of the PVASQ.ResultsThe kappa coefficients indicate a moderate to almost perfect strength of agreement between test and retest. The ICC for all scales tested for intra-rater (test-retest) reliability was good. The overall Cronbach' s alpha (N=25) is 0.912 and 0.908 for the two time points. The result of CFA (N=410) showed most items loaded strongly and correctly into corresponding factors. Only one item was eliminated.ConclusionsThis study is the first to develop and establish the reliability and validity of the Pharmacy Value-Added Services Questionnaire instrument using the Theory of Planned Behavior as the theoretical model. The translated Malay language version of PVASQ is reliable and valid to predict Malaysian patients' intention to adopt pharmacy value-added services to collect partial medicine supply.

Project description:OBJECTIVES:The aim of this study was to test the reliability and validity of a new questionnaire for measuring patient experiences with general practitioners (PEQ-GP) following a national survey. SETTING:Postal survey among patients on any of 500 GPs patient lists in Norway. GPs were stratified by practice size and geographical criteria. PARTICIPANTS:4964 patients who had at least one consultation with their regular GP in the foregoing 12 months were included in the study. The patients were randomly selected after the selection of GPs. 2377 patients (49%) responded to the survey. PRIMARY AND SECONDARY OUTCOME MEASURES:The items were assessed for missing data and ceiling effects. Factor structure was assessed using exploratory factor analyses. Reliability was tested with item-total correlation, Cronbach's alpha and test-retest correlations. Item discriminant validity was tested by correlating items with all scales. Construct validity was assessed through associations of scale scores with health status, the patients' general satisfaction with the services, whether the patient had been incorrectly treated by the GP and whether the patient would recommend the GP to others. RESULTS:Item missing varied from 1.0% to 3.1%, while ceiling effects varied from 16.1% to 45.9%. The factor analyses identified three factors. Reliability statistics for scales based on these three factors, and two theoretically derived scales, showed item-total correlations ranging from 0.63 to 0.85 and Cronbach's alpha values from 0.77 to 0.93. Test-retest correlation for the five scales varied from 0.72 to 0.88. All scales had the expected association with other variables. CONCLUSIONS:The PEQ-GP has good evidence for data quality, internal consistency and construct validity. The PEQ-GP is recommended for use in local, regional and national surveys in Norway, but further studies are needed to assess the instrument's ability to detect differences over time and between different GPs.

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Determining known-group validity and test-retest reliability in the PEQ (personalized exercise questionnaire).

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Determining known-group validity and test-retest reliability in the PEQ (personalized exercise questionnaire).

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