Comparison of psychometric properties of the International Outcome Inventory for Hearing Aids (IOI-HA) in various studies Comparación de las propiedades psicométricas del Cuestionario Internacional de Resultados para Auxiliares Auditivos (IOI-HA) en varios estudios

Abstract

The German translation of the International Outcome Inventory for Hearing Aids (IOI-HA) was used in a variety of studies including a retrospective mailing campaign and three field tests on recently launched hearing aids. The psychometric properties were compared with each other and with results of previous studies in the U.S.A, Wales, and the Netherlands. Like the English and the Dutch version, the German IOI-HA showed high internal consistency, and factor analyses as well as inter-item correlations indicated the existence of a two-dimensional scale. Furthermore, the IOI turned out to be a valid instrument for distinguishing satisfied and non-satisfied customers during the trial period of a hearing aid.

Psychometric properties of a revised Danish translation of the international outcome inventory for hearing aids (IOI-HA)

“…In regards to the psychometric properties, the overall results from the revised Danish translation of the IOI-HA are in general agreement with the findings of studies based on other translations (Cox & Alexander, 2002; Kramer et al, 2002; Heuermann et al, 2005; Smith et al, 2009; Brännström & Wennerström, 2010), while its factorial distribution differs slightly from Gasparin et al (2010) and Serbetcioglu et al (2009).…”

“…They found that the translation in general had similar psychometric properties to those of the English original (Cox & Alexander, 2002) as well as to the Dutch and German translations (Kramer et al, 2002; Heuermann et al, 2005). However, it was also established that item 5 (residual participation restrictions) did not make a logical contribution to the overall score in the original Danish translation.…”

“…All items are scored using the integers from 1 (poorest outcome) to 5 (best outcome) for the five response choices. While the total score gives an indication of the overall outcome, several studies have identified two distinct subscales within the IOI-HA (Cox & Alexander, 2002; Kramer et al, 2002; Heuermann et al, 2005; Smith et al, 2009; Brännström & Wennerström, 2010). These subscales respectively relate to introspective aspects of the hearing aid treatment (items 1, 2, 4, 7); and to the hearing-impaired person’s interaction with his or her surroundings (items 3, 5, 6).…”

“…Apart from the English original, translations were made available in 21 other languages (Cox et al, 2002). Detailed analyses of the psychometric properties are published for the English version in the United States (Cox & Alexander, 2002; Smith et al, 2009), Nigeria (Olusanya, 2004) and Wales (Stephens, 2002), as well as for the Dutch (Kramer et al, 2002), German (Heuermann et al, 2005), Turkish (Serbetcioglu et al, 2009), Portuguese (Gasparin et al, 2010), and Swedish (Brännström & Wennerström, 2010) translations.…”

Translation of the international outcome inventory for hearing aids into Portuguese from Portugal

“…A higher Cronbach α ratio corresponds to a high internal consistency. 8 This result is similar to the value observed in the English version 1 and lower than that of the German version 7 and it indicates that the translated version is consistent. The test-retest analysis showed no statistically significant difference between groups, reflecting an acceptable reliability.…”