The theory of planned behaviour and discrete food choices: a systematic review and meta-analysis

Table 2 Random-effects average correlation and heterogeneity statistics for TPB associations and healthy eating

Association	n	k	r ₊	CI	Q	I ²
Attitude-intention	28572	54	0.54	0.49-0.58	1202.19^***	95.59
Subjective norm-intention	28572	54	0.37	0.33-0.42	988.66^***	94.63
PBC-Intention	28284	53	0.42	0.36-0.48	2015.34^***	97.42
PBC-Behaviour	28737	54	0.27	0.23-0.32	843.16^***	93.71
Intention-Behaviour	29465	60	0.45	0.40-0.49	1326.56^***	95.55

n = number of participants, k = number of effect sizes included in the analysis, CI = 95 % confidence interval, Q and I ² = tests of heterogeneity, r ₊ = random effects average correlation, ^*** p < .001

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