extended · article · 2020

Catquest-9SF questionnaire and eCAPS: Validation in a Canadian population

Matthew B. Schlenker; Simona C. Minotti; Anna Kabanovski; Morgan Lim; Chelsea D’Silva; Julia Ma; Robert J. Reid; Iqbal Ike K. Ahmed; George Engelhard Jr.

BACKGROUND: Visual acuity alone has limitations in assessing a patient's appropriateness and prioritization for cataract surgery. Several tools, including the Catquest-9SF questionnaire and the electronic cataract appropriateness and priority system (eCAPS) have been developed to evaluate patients-reported visual function as related to day-to-day tasks. The aim of this study was to validate Catquest-9SF and eCAPS in a Canadian population and propose a shorter version of each, in an attempt to extend their applicability in clinical practice. METHODS: The English translation of the Swedish Catquest-9SF and eCAPS were self-administered separately in pre-operative patients in tertiary care in Peel region, Ontario. Rasch analysis was used to validate both scales and assess their psychometric properties, such as category threshold order, item fit, unidimensionality, precision, targeting, and d...