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  • Title: Validation of a quality of life questionnaire in the Pacific Island.
    Author: O'Connor PM, Scarr BC, Lamoureux EL, Le Mesurier RT, Keeffe JE.
    Journal: Ophthalmic Epidemiol; 2010 Dec; 17(6):378-86. PubMed ID: 21080810.
    Abstract:
    PURPOSE: To adapt an existing validated quality of life instrument, the Impact of Vision Impairment (IVI) questionnaire for Pacific Island countries. METHODS: Following in-depth interviews (n = 24) and a pilot study (n = 67), the original 32-item IVI questionnaire was translated and adapted in Vanuatu. The Melanesian IVI (IVI_M) was administered to participants not previously involved in the pilot study (n = 189). RESULTS: Participants included 117 (62%) with mild, moderate or severe vision impairment, 39 with unilateral loss and 33 with normal vision. Eighty-six percent of the original 32-items were deemed relevant by 90% of participants. Items displaying floor effects were removed (4), 2 were combined and 3 items rephrased to reflect Melanesian-specific activities, resulting in a 23-item IVI_M. Nineteen items were relevant to both the Melanesian and Australian contexts including all 8 items related to the emotional reaction to vision loss. IVI_M demonstrated content and construct validity, reliability and discriminated visually healthy populations from those with vision impairment. Vision impairment of < 6/18 negatively effected quality of life. CONCLUSION: While the adaptation process demonstrated the need for culturally relevant instruments, it also highlighted the value of adapting existing validated instrument for use in cross-cultural research rather than developing a new instrument from first principles.
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