Table 4 Intra-class correlation...

Table 4

Intra-class correlation coefficient (ICC) of estimates of total plate waste and plate waste by individual food components between the two assessors

Mealtimes	Food components	ICC (95%CI)^∗	p-value
Breakfast	All items	0.924 (0.822–0.969)	<0.001
	Scrambled egg	0.938 (0.665–0.982)	<0.001
	Grilled tomato	0.992 (0.980–0.997)	<0.001
	Hot dishes (spaghetti or baked beans)	0.835 (0.516–0.952)	<0.001
Lunch	All items	0.874 (0.815–0.916)	<0.001
	Main dish	0.953 (0.929–0.969)	<0.001
	Starch	0.914 (0.871–0.943)	<0.001
	Vegetables	0.912 (0.869–0.941)	<0.001
Dinner	All items	0.972 (0.958–0.982)	<0.001
	Main dish	0.979 (0.968–0.986)	<0.001
	Starch	0.963 (0.944–0.976)	<0.001
	Vegetables	0.960 (0.939–0.974)	<0.001

Mealtimes	Food components	ICC (95%CI)^∗	p-value
Breakfast	All items	0.924 (0.822–0.969)	<0.001
	Scrambled egg	0.938 (0.665–0.982)	<0.001
	Grilled tomato	0.992 (0.980–0.997)	<0.001
	Hot dishes (spaghetti or baked beans)	0.835 (0.516–0.952)	<0.001
Lunch	All items	0.874 (0.815–0.916)	<0.001
	Main dish	0.953 (0.929–0.969)	<0.001
	Starch	0.914 (0.871–0.943)	<0.001
	Vegetables	0.912 (0.869–0.941)	<0.001
Dinner	All items	0.972 (0.958–0.982)	<0.001
	Main dish	0.979 (0.968–0.986)	<0.001
	Starch	0.963 (0.944–0.976)	<0.001
	Vegetables	0.960 (0.939–0.974)	<0.001

Note(s): ^∗ ICC values were calculated using a two-way mixed effects model for absolute agreement. Values were interpreted as: <0.5 poor, 0.5–0.75 moderate, 0.75–0.90 good, >0.90 excellent reliability (Koo and Li, 2016)

Source(s): Authors' own work

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