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Table 4 Validity of COMPASS self-reported (S) and objectively measured (M) weight status and dietary intake measures

From: 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?

 

N

Intraclass correlation

Cronbach’s `lpha

Spearman correlation

Kappa/Weighted Kappa

  

ICC

α

rho

μ (SD)

Weight Status (males and females) §

     

 Height (cm)

139

0.88

0.94

0.88 (p < 0.001)

-

 Weight (kg)

139

0.95

0.98

0.96 (p < 0.001)

-

 Body Mass Index (kg/m2)

139

0.84

0.92

0.86 (p < 0.001)

-

Weight Status (males only) §

     

 Height (cm)

74

0.84

0.91

0.84 (p < 0.001)

-

 Weight (kg)

74

0.95

0.98

0.96 (p < 0.001)

-

 Body Mass Index (kg/m2)

74

0.85

0.92

0.86 (p < 0.001)

-

Weight Status (females only) §

     

 Height (cm)

65

0.82

0.89

0.83 (p < 0.001)

-

 Weight (kg)

65

0.94

0.99

0.97 (p < 0.001)

-

 Body Mass Index (kg/m2)

65

0.83

0.93

0.86 (p < 0.001)

-

Dietary Intake §

     

 Meat and alternatives (0–5 servings)

178

0.34

0.56

0.38 (p < 0.001)

0.36 (0.05)

 Fruits and vegetables (0–9 servings)

178

0.53

0.70

0.54 (p < 0.001)

0.47 (0.05)

 Milk and alternatives (0–6 servings)

178

0.60

0.77

0.63 (p < 0.001)

0.48 (0.04)

 Grain products (0–9 servings)

178

0.41

0.64

0.47 (p < 0.001)

0.33 (0.05)

Meeting Food Guide Recommendation §

     

 Meat and alternatives a

178

0.45

0.63

0.46 (p < 0.001)

0.45 (0.07)

 Fruits and vegetables b

178

0.54

0.70

0.54 (p < 0.001)

0.54 (0.11)

 Milk and alternatives c

178

0.52

0.69

0.52 (p < 0.001)

0.51 (0.06)

 Grain products d

178

0.36

0.58

0.41 (p < 0.001)

0.37 (0.08)

  1. § Self-reported measure at Time 2 and objective measure taken at Time 2.
  2. a ≥2 servings for females, ≥3 servings for males.
  3. b ≥7 servings for females, ≥8 servings for males.
  4. c ≥3 servings for females and males.
  5. d ≥6 servings for females, ≥7 servings for males.