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Validation of a brief scale to assess ambulatory patients' perceptions of reading visit notes: a scale development
Julie A Wright1, Suzanne G Leveille2,3,4, Hannah Chimowitz2
1Exercise and Health Sciences, University of Massachusetts, Boston, Massachusetts, USA Julie.Wright@umb.edu.
Objectives:
To develop and evaluate the validity of a scale to assess patients' perceived benefits and risks of reading ambulatory visit notes online (open notes).
Design:
Four studies were used to evaluate the construct validity of a benefits and risks scale. Study 1 refined the items; study 2 evaluated underlying factor structure and identified the items; study 3 evaluated study 2 results in a separate sample; and study 4 examined factorial invariance of the developed scale across educational subsamples.
Setting:
Ambulatory care in three large health systems in the USA.
Participants:
Participants in three US health systems who responded to one of two online surveys asking about benefits and risks of reading visit notes: a psychometrics survey of primary care patients, and a large general survey of patients across all ambulatory specialties. Sample sizes: n=439 (study 1); n=439 (study 2); n=500 (study 3); and n=250 (study 4).
Primary And Secondary Outcome Measures:
Questionnaire items about patients' perceived benefits and risks of reading online visit notes.
Results:
Study 1 resulted in the selection of a 10-point importance response option format over a 4-point agreement scale. Exploratory factor analysis (EFA) in study 2 resulted in two-factor solution: a four-item benefits factor with good reliability (alpha=0.83) and a three-item risks factor with poor reliability (alpha=0.52). The factor structure was confirmed in study 3, and confirmatory factor analysis of benefit items resulted in an excellent fitting model, X2(2)=2.949; confirmatory factor index=0.998; root mean square error of approximation=0.04 (0.00, 0.142); loadings 0.68-0.86; alpha=0.88. Study 4 supported configural, measurement and structural invariance for the benefits scale across high and low-education patient groups.
Conclusions:
The findings suggest that the four-item benefits scale has excellent construct validity and preliminary evidence of generalising across different patient populations. Further scale development is needed to understand perceived risks of reading open notes.
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