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Table 5 Meta-regression results of the impact of selected study-level variables on the meta-analysis estimates

From: A systematic review and meta-analysis of the effectiveness of food safety education interventions for consumers in developed countries

Meta-analysis sub-group/predictor No. trials/studies Average estimate of effect (95 % CI) Adjusted R2a
RCT-behaviour-SMD 10/10   
 Dose (>1 vs. 1 exposure)   0.68 (0.03, 1.33) 44.6 %
UBA-knowledge-RR 22/20   
 Document type (other vs. journal)   2.01 (1.18, 3.43) 19.3 %
UBA-behaviour-RR 20/17   
 Target population engaged in intervention (yes vs. no)   1.47 (1.02, 2.11) 27.4 %
  1. RCT randomized controlled trials, UBA uncontrolled before-and-after studies, SMD standardized mean difference (Hedges’ g), RR relative risk, CI confidence interval
  2. aAdjusted R2 refers to the proportion of between-study variance accounted for by the model