Table 3

Cut-off points of the quartiles of the F&V intakes frequency, at baseline, at first and at second follow-up, separately for the children of the Schoolgruiten Project and the Pro Children Study

First quartile

Second quartile

Third quartile

Fourth quartile


Schoolgruiten Project


Reports on fruit intake frequency (pieces per day), at baseline

0 – 0.86

0.87 – 1.43

1.44 – 2.14

2.15 – 4.00

Reports on fruit intake frequency (pieces per day), at first follow-up

0 – 0.86

0.87 – 1.43

1.44 – 2.00

2.01 – 4.00

Reports on fruit intake frequency (pieces per day), at second follow-up

0 – 1.00

1.01 – 1.43

1.44 – 2.00

2.01 – 4.00

Reports on vegetable intake frequency (gram per day), at baseline

0 – 71.0

71.1 – 100.3

100.4 – 149.8

149.9 – 288.0

Reports on vegetable intake frequency (gram per day), at first follow-up

19.1 – 71.0

71.1 – 100.3

100.4 – 141.5

141.6 – 288.0

Reports on vegetable intake frequency (gram per day), at second follow-up

17.9 – 71.0

71.1 – 96.0

96.1 – 121.5

121.6 – 288.0


Pro Children Study


Reports on fruit intake frequency (pieces per day), at baseline

0 – 0.43

0.44 – 1.00

1.01 – 2.00

2.01 – 3.00

Reports on fruit intake frequency (pieces per day), at first follow-up

0 – 0.43

0.44 – 0.79

0.80 – 2.00

2.01 – 3.00

Reports on fruit intake frequency (pieces per day), at second follow-up

0 – 0.43

0.44 – 1.00

1.01 – 2.00

2.01 – 3.00

Reports on vegetable intake frequency (gram per day), at baseline

0 – 39.6

39.7 – 68.9

69.0 – 101.0

101.1 – 400.0

Reports on vegetable intake frequency (gram per day), at first follow-up

0 – 49.6

49.7 – 75.7

75.8 – 112.8

112.9 – 301.8

Reports on vegetable intake frequency (gram per day), at second follow-up

0 – 46.5

46.6 – 64.2

64.3 – 99.9

100.0 – 450.0


Tak et al. International Journal of Behavioral Nutrition and Physical Activity 2008 5:21   doi:10.1186/1479-5868-5-21

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