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Cross-cultural adaptation and validation of the Iowa satisfaction with anesthesia scale for use in Brazil: a cross-sectional study
Journal article   Open access   Peer reviewed

Cross-cultural adaptation and validation of the Iowa satisfaction with anesthesia scale for use in Brazil: a cross-sectional study

Nicole Morem Pilau Moritz, José Eduardo Moritz, Gabriel Oscar Cremona Parma, Franklin Dexter and Jefferson Traebert
Brazilian journal of anesthesiology (Elsevier), Vol.74(3), 744471
05/2024
DOI: 10.1016/j.bjane.2023.11.001
PMCID: PMC11148495
PMID: 37952775
url
https://doi.org/10.1016/j.bjane.2023.11.001View
Published (Version of record) Open Access

Abstract

Background The Iowa Satisfaction with Anesthesia Scale (ISAS) was developed to assess the satisfaction of patients undergoing sedation with monitored anesthesia care. This study aimed to cross-culturally adapt the ISAS instrument and evaluate the acceptability, validity, and reliability of the proposed Brazilian version (ISAS-Br). Methods The cross-cultural adaptation process involved translation, synthesis, back-translation, expert committee review, pre-testing, and final review of the ISAS-Br. A cross-sectional study was conducted, involving 127 adult individuals undergoing ambulatory surgeries with moderate/deep sedation. The acceptability, reliability, and construct validity of the scale were assessed. Results The cross-cultural adaptation process did not require significant changes to the final version of the scale. The ISAS-Br demonstrated excellent acceptability, with a completion rate of 99% and an average completion time of 4.6 minutes. Exploratory factor analysis revealed three factors: emotional well-being, physical comfort, and anxiety relief, with respective composite reliability coefficient values of 0.874, 0.580, and 0.428. The test-retest reliability of the ISAS-Br, measured by the intraclass correlation coefficient, was 0.67 (95% Confidence Interval [95% CI] 0.42 to 0.83), and the Bland-Altman plot showed satisfactory agreement between the measurements. Conclusion The proposed Brazilian version of the ISAS underwent successful cross-cultural adaptation according to international standards. It demonstrated good acceptability and reliability, regarding the assessment of temporal stability. However, the ISAS-Br exhibited low internal consistency for some factors, indicating that this instrument lacks sensitivity to assess the satisfaction of deeply sedated patients. Further studies are necessary to explore the hypotheses raised based on the knowledge of its psychometric properties.

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