Improving the safety climate in hospitals by a vignette-based analysis of adverse events: a cluster randomised study

OBJECTIVE

To assess the impact of a vignette-based analysis of adverse events (AEs) on the safety climate (SC) of care units.

DESIGN

Prospective, open, cluster (a unit) randomised controlled trial.

SETTING

Eighteen acute care units of seven hospitals in France.

PARTICIPANTS

Healthcare providers who worked in the units.

INTERVENTION

Vignette-based analyses of AEs were conducted with unit's providers once per month for six consecutive months. The AEs were real cases that occurred in other hospitals. The hospital risk manager conducted each analysis as follows: analysis of the immediate and root causes of the AE; assessment of the care unit's vulnerabilities and existing barriers in the occurrence of an identical AE and search for solutions.

MAIN OUTCOME MEASURE

SC was measured using the French version of the Hospital Survey on Patient Safety Culture questionnaire. The primary outcome was the difference in the 'Organisational learning and continuous improvement' dimension score, from before to after the analyses.

RESULTS

Median participation rate in the analyses was 20% (range: 7-45%). Before intervention, the response rate to the SC survey was 80% (n = 210) in the intervention group and 73% (n = 191) in the control group. After intervention, it was 59% (n = 141) and 63% (n = 148), respectively. The dimension score evolved differently for the groups from before to after intervention (intervention: +10.2 points ±8.8; control: -3.0 points ±8.5, P = 0.04). Side effects were not measured.

CONCLUSIONS

Vignette-based analysis was associated with the improvement of the perception of participants regarding their institution's capacity for organisational learning and continuous improvement.

Validation of the French version of the Hospital Survey on Patient Safety Culture questionnaire

OBJECTIVE

To assess the psychometric properties of the French version of the Hospital Survey on Patient Safety Culture questionnaire (HSOPSC) and study the hierarchical structure of the measured dimensions.

DESIGN

Cross-sectional survey of the safety culture.

SETTING

18 acute care units of seven hospitals in South-western France.

PARTICIPANTS

Full- and part-time healthcare providers who worked in the units.

INTERVENTIONS

None.

MAIN OUTCOME MEASURES

Item responses measured with 5-point agreement or frequency scales. Data analyses A principal component analysis was used to identify the emerging components. Two structural equation modeling methods [LInear Structural RELations (LISREL) and Partial Least Square (PLS)] were used to verify the model and to study the relative importance of the dimensions. Internal consistency of the retained dimensions was studied. A test-retest was performed to assess reproducibility of the items.

RESULTS

Overall response rate was 77% (n = 401). A structure in 40 items grouped in 10 dimensions was proposed. The LISREL approach showed acceptable data fit of the proposed structure. The PLS approach indicated that three dimensions had the most impact on the safety culture: 'Supervisor/manager expectations & actions promoting safety' 'Organizational learning-continuous improvement' and 'Overall perceptions of safety'. Internal consistency was above 0.70 for six dimensions. Reproducibility was considered good for four items.

CONCLUSIONS

The French HSOPSC questionnaire showed acceptable psychometric properties. Classification of the dimensions should guide future development of safety culture improving action plans.