Measurement properties of the Sense of Coherence (SOC) scale: a narrative review

Propiedades de medición de la escala de Sentidode Coherencia (SOC): una revisión narrativa

Introduction: There is interest in conducting studies using the Sense of Coherence Scale (SOC), whose validity is characterised by its robustness and high quality, supported by the evaluation of its measurement properties, the result of an exhaustive methodology. In addition to the documentary review, we sought to evaluate the quality of the scientific evidence of the SOC. Methodology: A narrative review was conducted on the measurement properties applied in the validation process of the Sense of Coherence Scale in its different versions, following the guidelines established by the COSMIN methodology for the evaluation of methodological quality and SANRA for the evaluation of quality. Results: In terms of psychometric properties, the following were assessed as sufficient in terms of overall quality: structural validity, internal consistency, cross-cultural validity, criterion validity, construct validity, and responsiveness; measurement error was the property that was assessed as indeterminate in most items. Quality of scientific evidence: as evidence, reliability was moderate, and measurement error was low. The rest of the properties were rated as high in quality. Although the methodological quality assessment of structural and criterion validity was "very good," not all results were sufficient. Conclusion: The Sense of Coherence Scale can be used as a valid and reliable tool in different populations.