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Entry ID
80
Entry Date
September 13, 2022 1:58 pm
Reference Id
4gjN2SxUmrTkLJvf
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Document Status
Published
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Language
English
Year
2020
Category
Presentation Preference
Title
Comparison of inter-rater agreement when performing visual plate waste audits with standardized instructions vs. without standardized instructions
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Introduction/Purpose
Plate waste audits are routinely conducted to assess menu performance. A previous Fraser Health (FH) study on plate waste audits completed by Food Service Supervisors (FSS) without standardized instruction found good to excellent rater agreement on food remaining on trays, but lower agreement on item presence. Audit instructions were developed as it was unknown whether training would result in stronger agreement.
Objective(s)/Process or Summary of Content
To compare inter-rater agreement of plate waste audit scores between pairs of FSS who have received instruction versus those who have not received instruction.
Method(s)/Systemic Approach Used
A pair of FSS from three FH hospitals used the validated visual quarter-waste method to independently evaluate amounts of an entree and soup remaining on trays, where two of three pairs received instruction. Inter-rater agreement on food remaining and item presence were compared using intraclass correlation coefficient (ICC) and Kappa statistic, respectively.
Results/Conclusions
With instruction, rater agreement was stronger for the amount of soup remaining and presence of both entree and soup. Agreement between raters was excellent for the amount of entree remaining for both groups. ICC with instruction for entree (n=186) and soup (n=164) were 0.98 (95%CI=0.97-0.98) and 0.99 (95%CI=0.98-0.99), respectively (p<0.0001). ICC without instruction for entree (n=140) and soup (n=115) were 0.95 (95%CI=0.93-0.97) and 0.87 (95%CI=0.81-0.91), respectively (p<0.0001). Kappa value with instruction was 0.83 for entree (n=193) and 0.91 for soup (n=193) (p<0.0001). Without instruction, Kappa was 0.76 for entree (n=160) and 0.58 for soup (n=159) (p<0.0001).
Conclusions(s)/Recommendations
Results suggest standardized instruction is strongly recommended for plate waste audits. Fewer trays audited per rater or extra time to complete audits noted in the group with instruction could have been contributing factors and warrant further research.
Significance to Dietetics
Improving inter-rater agreement of the visual quarter-waste method using standardized instructions may increase accuracy of information used for subsequent menu planning decisions.
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