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What do patients with strabismus expect post surgery? The development and validation a questionnaire

McBain, H. B., MacKenzie, K., Hancox, J. , Ezra, D. G., Adams, G. G. W. & Newman, S. P. (2016). What do patients with strabismus expect post surgery? The development and validation a questionnaire. British Journal of Ophthalmology, 100(3), pp. 415-419. doi: 10.1136/bjophthalmol-2015-307027


Aims: To develop and validate a short questionnaire to assess patients’ expectations about outcomes post strabismus surgery.

Methods: Questionnaire items were extracted from previous literature and reviewed by a multidisciplinary team. A cross-sectional study was then undertaken with 220 adult patients due to undergo strabismus surgery. Participants completed the 17-item questionnaire. Scale structure was explored using principal component analysis (PCA), and the subscales analysed in relation to demographic and clinical characteristics and psychosocial well-being in order to establish validity.

Results: PCA revealed a 3-factor solution for the Expectations of Strabismus Surgery Questionnaire (ESSQ): (a) intimacy and appearance-related issues, (b) visual functioning, (c) social relationships. This 3-factor solution explained 59.30% of the overall variance in the ESSQ. Internal consistency, content and nomological and concurrent validity were considered acceptable.

Conclusions: Patients with strabismus have high expectations about their postsurgical outcomes. This questionnaire provides a useful tool to assess the expectations patients have about their surgery, whether these expectations change over time and how they impact on postsurgical outcomes.

Publication Type: Article
Additional Information: Article appears in British Journal of Ophthalmology,
Subjects: R Medicine > RE Ophthalmology
Departments: School of Health & Psychological Sciences > Healthcare Services Research & Management
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