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Table 6 Quality assessment of the included quasi-experimental studies

From: Community-based interventions to increase dairy intake in healthy populations: a systematic review

Author* Is it clear in the study what is the “cause” and what is the “effect” Were the participants included in any comparisons similar Were the participants included in any comparisons receiving similar treatment/care, other than the exposure or intervention of interest? Was there a control group? Were there multiple measurements of the outcome both pre and post the intervention/exposure? Was follow-up complete and if not, were differences between groups in terms of their follow up adequately described and analyzed? Were the outcomes of participants included in any comparisons measured in the same way? Were outcomes measured in a reliable way? Was appropriate statistical analysis used?
Yeudall, et al. 2005 Y Y Y Y Y U Y Y Y
Gates, et al. (1) 2013 Y Y Y N Y Y Y U Y
Gates, et al. (2) 2013 Y Y Y N Y Y Y Y U
Watson, et al. 2009 Y Y Y Y Y Y Y Y Y
Wordell, et al. 2012 Y Y Y Y N Y Y Y Y
Freedman and Nickell 2010 Y Y Y N Y Y Y Y Y
  1. U unclear, N no, Y yes
  2. *All the studies are considered as low risk of bias