Implementation methods for vision related quality of life questionnaires

Abstract

Aim-To determine the most reliable and consistent method and time interval over which to implement a vision impairment quality of life assessment tool. Methods-117 patients with low vision aged 9-101 years were assigned into three age, sex, and visual function matched groups (n = 39 in each) to answer the Low Vision Quality of Life (LVQOL) questionnaire by post, telephone, or in person. The LVQOL questionnaire was completed on four occasions, each separated by four weeks. Results-Postal implementation was the most cost effective method, showed the highest internal consistency of LVQOL items, but resulted in a lower apparent quality of life score than either telephone or in-person interviews ..