Table 2

Overall Efficacy of Prediction of Behaviour According to Methodological Factors

Fruit and Vegetable Intake

Fruit Intake

Vegetable Intake


Nb of Participants (Nb of Studies)

Random-Effect R2

Nb of Participants (Nb of Studies)

Random-Effect R2

Nb of Participants (Nb of Studies)

Random-Effect R2


Study Design

Cross-sectional

30733 (13)

0.18

8337(9)

0.17

8337 (9)

0.14

Longitudinal

1142 (3)

0.51

783(2)

0.29

-

-

Level of Correspondence

Low

4818 (5)

0.33

7811 (7)

0.15

7811 (7)

0.15

Good

27057 (11)

0.20

1309 (4)

0.28

526 (2)

0.101

Psychometric Quality of Psychosocial Variables

Low

6233 (3)

0.17

3680 (3)

0.12

3680 (3)

0.14

Good

25642 (13)

0.25

5440 (8)

0.22

4657 (6)

0.14

Quality of Behavioural Measures

Low

1360 (2)

0.161

291 (1)

0.18

291 (1)

0.08

Good

30515 (14)

0.25

8829(10)

0.19

8046 (8)

0.15

Samples

Women and Men

25623 (10)

0.29

7224 (6)

0.22

6441 (4)

0.17

Women

2707 (3)

0.17

1164 (3)

0.20

1164 (3)

0.12

Men

3545 (3)

0.12

732 (2)

0.12

732 (2)

0.10


Note: Dashes indicate that no study was concerned.

1Non-significant heterogeneity. Significant heterogeneity was detected using Q test (p < 0.05) and degree of heterogeneity I2 > 75% in all other analyses.

Guillaumie et al. International Journal of Behavioral Nutrition and Physical Activity 2010 7:12   doi:10.1186/1479-5868-7-12

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