Reliability and validity of the weight status and dietary intake measures in the COMPASS questionnaire: are the self-reported measures of body mass index (BMI) and Canada’s food guide servings robust?

Table 2 Test-retest reliability of the COMPASS weight status and dietary intake measures

	N	Intraclass correlation	Cronbach’s alpha	Spearman correlation	Kappa/Weighted Kappa
		ICC	α	*rho*	*μ (SD)*
Weight Status ^§
Height (cm)	139	0.96	0.98	0.96 (p < 0.001)	-
Weight (kg)	139	0.99	0.99	0.99 (p < 0.001)	-
Body Mass Index (kg/m²)	139	0.95	0.98	0.95 (p < 0.001)	-
Dietary Intake ^§
Meat and alternatives (0–5 servings)	178	0.41	0.59	0.42 (p < 0.001)	0.28 (0.04)
Fruits and vegetables (0–9 servings)	178	0.68	0.81	0.69 (p < 0.001)	0.52 (0.04)
Milk and alternatives (0–6 servings)	178	0.69	0.83	0.71 (p < 0.001)	0.48 (0.04)
Grain products (0–9 servings)	178	0.56	0.73	0.57 (p < 0.001)	0.42 (0.05)
Meeting Food Guide Recommendation ^§
Meat and alternatives ^a	178	0.27	0.44	0.28 (p < 0.001)	0.27 (0.07)
Fruits and vegetables ^b	178	0.53	0.73	0.58 (p < 0.001)	0.53 (0.12)
Milk and alternatives ^c	178	0.54	0.71	0.55 (p < 0.001)	0.54 (0.06)
Grain products ^d	178	0.38	0.56	0.39 (p < 0.001)	0.38 (0.12)

ISSN: 1479-5868