Table 4

Tracking values

Younger group (EYHS I to EYHS II)

Older group (EYHS I to EYHS II)

Stability^a

Cohen's κ^b

Predictive value^c

Stability^a

Cohen's κ^b

Predictive value^c

Food groups

Bread

0.36

0.06

0.76

0.36

0.06

0.50

Milk, fil, yoghurt

0.49

0.30

1.17

0.35

0.06

0.58

Cheese

0.49

0.16

0.86

0.29

< 0

0.45

Vegetables

0.38

0.11

0.55

0.40

0.17

0.79

Fruit

0.40

0.10

0.76

0.49

0.23

0.82

Fruit juice

0.14

< 0

0.45

0.16

n/a

0.67

Pasta, rice, potatoes

0.37

0.06

0.55

0.44

0.14

0.64

Cereals

0.50

0.15

0.77

0.49

0.11

0.69

Pizza, pies, pancakes

0.66

n/a^d

0.22

0.77

n/a

0.35

Meat, meat dishes

0.34

< 0

0.47

0.36

0.06

0.65

Poultry, poultry dishes

0.76

n/a

0.33

0.78

n/a

0.15

Spreads, oils

0.34

< 0

0.56

0.29

< 0

0.38

Sweets, chocolate

0.33

0.00

0.43

0.41

0.12

0.79

Cakes, biscuits

0.23

n/a

0.48

0.51

0.05

0.61

Other sweet foods

0.37

0.04

0.49

0.39

0.06

0.62

Sweetened drinks

0.44

0.07

0.63

0.48

0.17

0.72

Chips, crisps

0.67

n/a

0.22

0.34

n/a

0.69

Nutrients

Energy

0.36

0.07

0.60

0.33

0.06

0.58

Protein^e

0.36

0.05

0.57

0.42

0.16

0.67

Fat^e

0.37

0.06

0.54

0.35

0.04

0.54

Saturated fat^e

0.38

0.09

0.69

0.36

0.07

0.62

Carbohydrates^e

0.36

0.06

0.54

0.35

0.03

0.58

Sucrose^e

0.39

0.11

0.57

0.38

0.07

0.71

Fibre

0.36

0.09

0.65

0.48

0.26

0.94

Vitamin C

0.38

0.04

0.42

0.42

0.19

0.76

Folic acid

0.35

0.02

0.60

0.37

0.09

0.71

Iron

0.35

0.04

0.48

0.34

0.04

0.58

Calcium

0.43

0.18

0.75

0.39

0.06

0.62

Energy density

0.35

0.06

0.65

0.40

0.16

0.58

^a Proportion remaining in the same tertile six years later

^b Cohen's κ, Cohen's kappa (weighted)

^c Predictive value for remaining in the highest tertile

^d N/a: not applicable because three groups not available at both time points

^e As a percentage of total energy

Patterson et al. International Journal of Behavioral Nutrition and Physical Activity 2009 6:91   doi:10.1186/1479-5868-6-91