Table 2

Relative validity and test-retest reliability of the New Zealand Diet Quality Index for Adolescents
Relative validity (n = 41) Reliability (n = 52)
Component CC1 % CC % GM CC2 % CC % GM
FRUIT 0.28 39 15 0.67 62 4
VEGGIE 0.21 34 5 0.58 62 2
CEREAL 0.57 63 2 0.56 90 10
DAIRY 0.40 39 15 0.63 73 10
MEAT 0.27 27 7 0.32 44 12
Total Score 0.39 51 10 0.65 60 6

Correlation coefficients (CC), percent correctly classified (% CC), percent grossly misclassified (% GM), Fruits (FRUIT), Vegetables (VEGGIE), Bread and cereals (CEREAL), Milk and milk products (DAIRY), Meat and alternatives (MEAT).

1 Pearson’s correlations for FRUIT, MEAT and Total Score while Spearman’s correlations for VEGGIE, CEREAL and DAIRY between FQ and 4DFR.

2 Pearson’s correlations for FRUIT, MEAT and Total Score while Spearman’s correlations for VEGGIE, CEREAL and DAIRY between first and second FQs.

Wong et al.

Wong et al. BMC Public Health 2013 13:562   doi:10.1186/1471-2458-13-562

Open Data