Figure 3From: Association of behaviour change techniques with effectiveness of dietary interventions among adults of retirement age: a systematic review and meta-analysis of randomised controlled trials Meta-regression of number of BCTs on overall fruit and vegetable intake. Number of BCTs. Slope = 8.28, Q = 3.84, d.f. = 1, P = 0.049. The circle size reflects the weight that a study obtained in the meta-regression.Back to article page