Validation of the Primary Care Patient Measure of Safety (PC PMOS) questionnaire

Giles, Sally J., Parveen, Sahdia and Hernan, Andrea 2018, Validation of the Primary Care Patient Measure of Safety (PC PMOS) questionnaire, BMJ quality and safety, doi: 10.1136/bmjqs-2018-007988.

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Title Validation of the Primary Care Patient Measure of Safety (PC PMOS) questionnaire
Author(s) Giles, Sally J.
Parveen, Sahdia
Hernan, AndreaORCID iD for Hernan, Andrea orcid.org/0000-0003-4542-1186
Journal name BMJ quality and safety
Total pages 8
Publisher BMJ Publishing Group
Place of publication London, Eng.
Publication date 2018-10-18
ISSN 2044-5423
Keyword(s) patient safety
primary care
quality improvement
surveys
validation
Summary BACKGROUND: The Primary Care Patient Measure of Safety (PC PMOS) is designed to capture patient feedback about the contributing factors to patient safety incidents in primary care. It required further reliability and validity testing to produce a robust tool intended to improve safety in practice. METHOD: 490 adult patients in nine primary care practices in Greater Manchester, UK, completed the PC PMOS. Practice staff (n = 81) completed a survey on patient safety culture to assess convergent validity. Confirmatory factor analysis (CFA) assessed the construct validity and internal reliability of the PC PMOS domains and items. A multivariate analysis of variance was conducted to assess discriminant validity, and Spearman correlation was conducted to establish test-retest reliability. RESULTS: Initial CFA results showed data did not fit the model well (a chi-square to df ratio (CMIN/DF) = 5.68; goodness-of-fit index (GFI) = 0.61, CFI = 0.57, SRMR = 0.13  and root mean square error of approximation (RMSEA) = 0.10). On the basis of large modification indices (>10), standardised residuals >± 2.58 and assessment of item content; 22 items were removed. This revised nine-factor model (28 items) was found to fit the data satisfactorily (CMIN/DF = 2.51; GFI = 0.87, CFI = 0.91, SRMR = 0.04  and RMSEA = 0.05). New factors demonstrated good internal reliability with average inter-item correlations ranging from 0.20 to 0.70. The PC PMOS demonstrated good discriminant validity between primary care practices (F = 2.64, df = 72, p < 0.001) and showed some association with practice staff safety score (convergent validity) but failed to reach statistical significance (r = -0.64, k = 9, p = 0.06). CONCLUSION: This study led to a reliable and valid 28-item PC PMOS. It could enhance or complement current data collection methods used in primary care to identify and prevent error.
Notes In Press
Language eng
DOI 10.1136/bmjqs-2018-007988
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2018, The Authors
Persistent URL http://hdl.handle.net/10536/DRO/DU:30114678

Document type: Journal Article
Collections: School of Medicine
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