ABSTRACT
OBJECTIVE: Creation and validation of a new in-house synthetic scale to measure patient safety culture. MATERIAL AND METHOD: Cross-sectional and descriptive study in which the results of the assessment of the level of safety culture in health and non-health professionals of a university hospital are collected using a new in-house synthetic scale as a measurement tool. It is called 'Questionnaire on patient safety culture in a Spanish speaking environment'. The construction process was carried out in six phases: Bibliographic search; Validation of the structure and content of the questionnaire by a group of experts in patient safety using a nominal group technique; Assumptions verification and exploratory factor analysis; Pilot test to ensure its compression by a convenience sample of expert professionals; Modification of version 1.1 after the relevant analyses and analysis of the reliability of the questionnaire. RESULTS: The final version of the questionnaire had nine items, grouped into three factors a priori: Hospital Management support in patient safety, Perception of Safety, and Expectations and actions of the Managers/Supervisors that favour safety. The items were structured using a 5-point Likert scale. A general assessment item on patient safety at the Centre was also included, as well as five open questions to identify actions on patient safety undertaken by the Centre. Finally, the possibility of making observations in a section of free text was included. The comprehension analysis did not recommend, in any case, the revision of the wording or modification of the items. The Spearman and Pearson indices were similar, which allowed us to assume the linearity in the relationships proposed. The Kolmogorov-Smirnov test was satisfactory in all cases, which guaranteed the normal distribution of the variables. The sample was adequate to perform the factorial analysis. Both the Bartlett' sphericity test and the Kaiser-Meyer-Olkin (KMO) index showed sample quality to perform the analysis. The recommendation of the exploratory factor analysis that advised eliminating 1 item was followed. Specifically, item 9 was eliminated: 'It is only a matter of luck that in my Centre no more errors occur that affect patients'. The analysis of our scale has shown that all the factorial loads were greater than 0.5, which indicates good explanatory capacity of the item for the Dimension. In total, the scale manages to explain more than 60% of the perception by professionals in patient safety, considering an acceptable loss of information. CONCLUSIONS: A new and validated in-house scale has been created to measure patient safety culture in the Spanish speaking healthcare environment.
