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

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.

ISSN: 1479-5868