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Implementation methods for vision related quality of life questionnaires.

J S Wolffsohn1, A L Cochrane, N A Watt

  • 1Victorian College of Optometry, University of Melbourne, Victoria, Australia. j.s.wolffsohn@aston.ac.uk

The British Journal of Ophthalmology
|September 1, 2000
PubMed
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Mailing the Low Vision Quality of Life (LVQOL) questionnaire is a cost-effective method for assessing vision-related quality of life. This method demonstrates high reliability and internal consistency for visually impaired individuals.

Area of Science:

  • Ophthalmology
  • Quality of Life Research
  • Rehabilitation Science

Background:

  • Assessing quality of life is crucial for understanding the impact of vision impairment.
  • Standardized tools are needed to reliably measure quality of life in visually impaired populations.
  • The Low Vision Quality of Life (LVQOL) questionnaire is a key instrument in this field.

Purpose of the Study:

  • To identify the most reliable and consistent method for administering the LVQOL questionnaire.
  • To determine the optimal time interval for implementing vision impairment quality of life assessments.
  • To compare postal, telephone, and in-person administration methods.

Main Methods:

  • 117 patients (aged 9-101) with low vision were grouped by age, sex, and visual function.

Related Experiment Videos

  • Participants completed the LVQOL questionnaire via post, telephone, or in person.
  • The questionnaire was administered on four separate occasions, four weeks apart.

    • Main Results:

    • Postal administration was most cost-effective with highest internal consistency but yielded lower scores than other methods.
    • Test-retest reliability did not differ significantly across the three implementation methods.
    • A trend towards reduced quality of life scores at 3 months was observed but not statistically significant.

    Conclusions:

    • Mailed LVQOL questionnaires are recommended for clinical measurement of vision-related quality of life.
    • Postal implementation is reliable, cost-effective, and unbiased, even for severely visually impaired patients.
    • Quality of life can be measured up to 2 months post-rehabilitation without affecting baseline scores.