Abstract
Purpose
The assessment of symptoms of dry eye disease using a questionnaire is an effective
and simple method of quantifying symptoms. The aim of this study was to translate
the SPEED questionnaire and adapt it for the Italian language and verify the main
psychometric performance of the translated version, including repeatability and agreement.
Methods
The SPEED questionnaire was translated into Italian following a standard methodology.
The resulting questionnaire was administered to 206 adult participants in order to
perform a validation analysis. A subgroup of 82 participants was retested after one
week to give a repeatability and agreement assessment.
Results
Internal consistency showed an alpha of 0.852 (95% CI 0.818–0.881) and no unnecessary
items. The factor analysis showed a saturation for three main factors related to (i)
Dryness and Soreness, (ii) Fatigue, and (iii) Burning. Repeatability was high, with
a CCC of 0.896 (95% CI 0.844–0.931). Agreement analysis showed no significant bias
between sessions and an interval of agreement of 5 points for SPEED score.
Conclusion
The translation and adaptation of the SPEED questionnaire for the Italian language
have demonstrated good psychometric properties for the translated questionnaire, confirming
and expanding the original psychometric characteristics. Consequently, the SPEED questionnaire
could be used to measure the presence of symptoms of dry eye quantitatively.
Keywords
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Article info
Publication history
Published online: August 11, 2021
Accepted:
August 1,
2021
Received in revised form:
July 23,
2021
Received:
May 12,
2021
Identification
Copyright
© 2021 British Contact Lens Association. Published by Elsevier Ltd. All rights reserved.
