Abstract
Objective
Preoperative fasting is routinely performed to prevent anaesthesia-related pulmonary
aspiration. To capture patients’ experiences with preoperative fasting, a 13-item
questionnaire was developed and validated using Rasch analysis and shortened to 6
items. This extension study aims to assess this questionnaire's ability to discriminate
between participants with a short versus long duration of fasting and early versus
late day surgery.
Design
Single-centred cross-sectional study.
Participants
Subjects were recruited via consecutive sampling of cataract patients on surgery day
at Kensington Eye Institute in Toronto from February to December 2019.
Methods
A validated preoperative fasting questionnaire was administered. Discriminative ability
was assessed by comparing responses in patients scheduled for surgery in the morning
(8:00 am–12:00 pm) versus afternoon (12:00 pm–3:30 pm) and fasting for short (≤8 hours) versus long (>8 hours) duration. Diagnostic ability
of the 6-item questionnaire relative to the 13-item questionnaire was assessed with
receiver operating characteristics curve analysis.
Results
A total of 164 patients (mean age 70.8 ± 10.0 years; 57% female) were included. Total
scores of patients having surgery in the morning were greater (i.e., less fasting-related
burden) than in the afternoon (p = 0.04). There was no significant difference in scores between patients fasting for
a short versus long duration (p > 0.05). Receiver operating characteristics curve analysis showed excellent diagnostic
ability of the 6-item questionnaire relative to the 13-item version (area under the
curve = 0.964).
Conclusion
The 6-item questionnaire for fasting-related burden has excellent discriminative ability
between early versus late surgery patients. The time fasting while awake may be a
more relevant predictor of fasting-related burden relative to the total duration of
fasting.
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Article Info
Publication History
Published online: June 30, 2022
Accepted:
June 7,
2022
Received in revised form:
May 24,
2022
Received:
October 17,
2021
Publication stage
In Press Corrected ProofIdentification
Copyright
© 2022 Canadian Ophthalmological Society. Published by Elsevier Inc. All rights reserved.
