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Table 1 Overall Efficacy of Prediction According to the Theoretical Framework Used

From: Psychosocial determinants of fruit and vegetable intake in adult population: a systematic review

 

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

Overall Efficacy of Prediction

      

...to model behaviour

31875 (16)

0.23

9120 (11)

0.19

8337 (9)

0.14

...to model intention

16717 (3)

0.34

1894 (4)

0.43

1267 (3)

0.31

Efficacy of Frameworks to Model Behaviour

      

   SCT

2286 (3)

0.41

794 (1)

0.17

794 (1)

0.13

   TPB

430 (2)

0.45

1309 (4)

0.28

526 (2)

0.101

   HBM

1069 (1)

0.16

-

-

-

-

   Multicomponent

28090 (10)

0.16

7017 (6)

0.15

7017 (6)

0.15

Efficacy of Frameworks to Model Intention

      

   TPB

430 (2)

0.41

1894 (4)

0.43

1267 (3)

0.31

   Multicomponent

16287 (1)

0.21

-

-

-

-

  1. Note: Dashes indicate that no study was concerned.
  2. 1Non-significant heterogeneity. Significant heterogeneity was detected using Q test (p < 0.05) and degree of heterogeneity I2 > 75% in all other analyses.