Validation to Spanish of the Iowa Satisfaction with Anesthesia Scale (ISAS) for monitored anesthesia care in ophthalmic surgery

Abstract

The Iowa Satisfaction with Anesthesia Scale (ISAS) was rigorously developed and has been shown to be valid and reliable for evaluating patient satisfaction with monitored anesthesia care (MAC) in several scenarios. Such an instrument is important given the success that MAC is enjoying in the field. ObjectiveValidate the ISAS in Spanish and establish indicators of validity and reliability in patients undergoing ophthalmic surgeries with MAC. MethodsA translation and back-translation of the scale, face validity and pilot tests for adjustments were completed. The final instrument was applied to 117 subjects over 18 years of age, ASA I–III, in two healthcare institutions in Villavicencio (Meta Department, Colombia) in order to measure the concurrent criterion validity between the patients and the anesthesiologist of the case. The internal consistency of the scale was established in its first application to the subjects and later applied for the second and third times to verify the test–retest reliability. ResultsA Pearson anesthesiologist/patient concurrent criterion validity 0.85 CI 95% (0.79–0.89), intra-class 0.82 CI 95% (0.77–0.88), was confirmed. Internal consistency was measured with a Cronbach's alpha of 0.71. Test–retest reliability (40–65min) was measured with Pearson and intra-class 0.95 CI 95% (0.93–0.96) and, (12–36h) Pearson 0.65 CI 95% (0.52–0.75), intra-class 0.64 CI 95% (0.53–0.76). ConclusionsThe validation of the ISAS in Spanish allows for the use of a valid and reliable instrument to objectively measure the satisfaction of the patient in ophthalmic surgery under MAC.