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The eight-item modified Medical Outcomes Study Social Support Survey: psychometric evaluation showed excellent performance.

ABSTRACT: Evaluation and validation of the psychometric properties of the eight-item modified Medical Outcomes Study Social Support Survey (mMOS-SS).Secondary analyses of data from three populations: Boston breast cancer study (N=660), Los Angeles breast cancer study (N=864), and Medical Outcomes Study (N=1,717). The psychometric evaluation of the eight-item mMOS-SS compared performance across populations and with the original 19-item Medical Outcomes Study Social Support Survey (MOS-SS). Internal reliability, factor structure, construct validity, and discriminant validity were evaluated using Cronbach's alpha, principal factor analysis (PFA), and confirmatory factor analysis (CFA), Spearman and Pearson correlation, t-test and Wilcoxon rank sum tests.mMOS-SS internal reliability was excellent in all three populations. PFA factor loadings were similar across populations; one factor >0.6, well-discriminated two factor (instrumental/emotional social support four items each) >0.5. CFA with a priori two-factor structure yielded consistently adequate model fit (root mean squared errors of approximation 0.054-0.074). mMOS-SS construct and discriminant validity were similar across populations and comparable to MOS-SS. Psychometric properties held when restricted to women aged ? 65 years.The psychometric properties of the eight-item mMOS-SS were excellent and similar to those of the original 19-item instrument. Results support the use of briefer mMOS-SS instrument; better suited to multidimensional geriatric assessments and specifically in older women with breast cancer.

SUBMITTER: Moser A

PROVIDER: S-EPMC4119888 | biostudies-literature | 2012 Oct

REPOSITORIES: biostudies-literature

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The eight-item modified Medical Outcomes Study Social Support Survey: psychometric evaluation showed excellent performance.

Moser André A Stuck Andreas E AE Silliman Rebecca A RA Ganz Patricia A PA Clough-Gorr Kerri M KM

Journal of clinical epidemiology 20120720 10

<h4>Objective</h4>Evaluation and validation of the psychometric properties of the eight-item modified Medical Outcomes Study Social Support Survey (mMOS-SS).<h4>Study design and setting</h4>Secondary analyses of data from three populations: Boston breast cancer study (N=660), Los Angeles breast cancer study (N=864), and Medical Outcomes Study (N=1,717). The psychometric evaluation of the eight-item mMOS-SS compared performance across populations and with the original 19-item Medical Outcomes Stu ...[more]

PMID: 22818947

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Project description:BACKGROUND:Social support plays a crucial role in the treatment and recovery process of patients engaging in methadone maintenance treatment (MMT). However, there is a paucity of research about social support among MMT patients, possibly due to a lack of appropriate measuring tools. This study aimed to evaluate the psychometric properties of the Vietnamese version of the Medical Outcomes Study: Social Support Survey (MOS-SSS) among MMT patients. METHODS:A cross-sectional survey of 300 patients was conducted in a methadone clinic in Ho Chi Minh City, Vietnam. MMT patients who agreed to participate in the study completed a face-to-face interview in a private room. The MOS-SSS was translated into Vietnamese using standard forward-backward process. Internal consistency was measured by Cronbach's alpha. The intra-class correlation coefficient was used to determine the test-retest reliability of the MOS-SSS in 75 participants two weeks after the first survey. Concurrent validity of the MOS-SSS was evaluated by correlations with the Multidimensional Scale of Perceived Social Support (MSPSS) and the Perceived Stigma of Addiction Scale (PSAS). Construct validity was investigated by confirmatory factor analysis. RESULTS:The MOS-SSS had good internal consistency with Cronbach's alpha from 0.95 to 0.97 for the four subscales and 0.97 for the overall scale. The two-week test-retest reliability was at moderate level with intra-class correlation coefficients of 0.61-0.73 for the four subscales and 0.76 for the overall scale. Strong significant correlations between the MOS-SSS and the MSPSS (r?=?0.77; p?<?0.001) and the PSAS (r?=?-?0.76; p?<?0.001) indicated good concurrent validity. Construct validity of the MOS-SSS was established since a final four-factor model fitted the data well with Comparative Fit Index (0.97), Tucker-Lewis Index (0.97), Standardized Root Mean Square Residual (0.03) and Root Mean Square Error of Approximation (0.068; 90% CI?=?0.059-0.077). CONCLUSIONS:The MOS-SSS is a reliable and valid tool for measuring social support in Vietnamese MMT patients. Further studies among methadone patients at different stages of their treatment and among those from different areas of Vietnam are needed.

Project description:BackgroundSuccessive health system reforms have steadily eroded physician autonomy. Escalating accountability demands placed on physicians concurrent with diminishing autonomy plus widespread "cost cutting" endanger clinical work-life quality and, in turn, threaten patient-care quality, safety, and continuity. This has engendered a renewed emphasis on bettering physician work-life to safeguard patient care. Research indicates that autonomy support could be an effective intervention point in this dynamic, and that improving healthcare practitioners' experience of autonomy can promote better patient outcomes. New measures of autonomy support towards physicians during systemic/organizational transformation are thus needed.ObjectiveWe investigated the validity and reliability of two versions of a brief measure of physicians' perceptions of autonomy support.DesignPsychometric evaluation of practitioners' responses to a theory-based, pilot-tested, multi-center, cross-sectional survey-questionnaire.ParticipantsPhysicians serving in California, Massachusetts, or upstate New York clinical practices implementing pay-for-performance incentives were eligible. We obtained responses from 1,534 (35.14%) of 4,365 physicians surveyed.AnalysisWe randomly partitioned the study sample equitably into derivation and validation subsamples. We conducted parallel analysis, inter-item/point-biserial correlations, and item-response-theory-based graded response modeling on six autonomy support items. Three items with the highest (a) point-biserial correlations, (b) item-level discrimination and (c) information capture were used to construct a short-form (3-item) version of the full (6-item) autonomy scale. We utilized exploratory structural equation modeling and confirmatory factor analysis to establish the factor structure and construct validity of the full-length and short-form scales before comparing their factor invariance, reliability and interrater agreement across physician subgroups.FindingsAll six autonomy support items loaded highly onto one factor accounting for the majority of variance and demonstrating good data fit. The three most discriminating and informative items loaded equally well onto a single factor with similar goodness-of-fit to the data. The three-item scale correlated highly with its six-item parent, showing equally high sensitivity and specificity in discriminating high autonomy support. Variability in scores nested predominantly at within- rather than between-subgroup levels.Conclusions and implicationsOur data supported the factor structure, construct validity, internal consistency, and reliability of six- and three-item autonomy support scales. These brief tools are easily incorporated into multi-dimensional questionnaires at relatively low cost.

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The eight-item modified Medical Outcomes Study Social Support Survey: psychometric evaluation showed excellent performance.

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The eight-item modified Medical Outcomes Study Social Support Survey: psychometric evaluation showed excellent performance.

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