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A comparison between patients with epiphora and cataract of the activity limitations they experience in daily life due to their visual disability
Author(s) -
Bohman Elin,
Wyon Maria,
Lundström Mats,
Dafgård Kopp Eva
Publication year - 2018
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/aos.13447
Subject(s) - rasch model , medicine , dacryocystorhinostomy , cataract surgery , activities of daily living , physical therapy , surgery , psychology , developmental psychology
Abstract Purpose The objective of this study was to compare patients with epiphora and cataract in terms of the activity limitations they experience in daily life due to their visual disability and to validate the use of the Catquest‐9 SF questionnaire for epiphora patients. Methods Seventy‐two consecutively encountered adult patients with confirmed lacrimal obstruction and listed for dacryocystorhinostomy ( DCR ) or lacrimal intubation at the St. Erik Eye Hospital, Stockholm, Sweden, completed the Catquest‐9 SF questionnaire, which measures activity limitations in daily life due to visual disability. The psychometric qualities of the Catquest‐9 SF results obtained from this group of patients were evaluated by Rasch analysis. Rasch analysis was further employed to convert the ordinal raw data to a Rasch score for comparison with the preoperative scores of patients registered in the Swedish National Cataract Register ( NCR ) during March 2013. Results The Catquest‐9 SF exhibited good psychometric qualities when investigating epiphora patients, with the exception of a misfit for Item 4, the item regarding facial recognition. On the Rasch scale (−5.43 = no activity limitations to +5.01 = severe activity limitations), the mean score for epiphora patients was −0.82 while for patients listed for 1st eye and 2nd eye cataract surgery it was −0.17 and −0.76, respectively. An equivalence test confirmed that the reported visual disability of epiphora patients was not significantly different from visual disability reported by patients waiting for 2nd eye cataract surgery. Conclusion The Catquest‐9 SF is a valid measure of visual disability in patients with epiphora. Epiphora patients experience visual disability to the same degree as patients awaiting 2nd eye cataract surgery.