9d39be1d_nting_Support__Online_Database__Quantitative_studies
[Dimension] Sample representativeness [Qualitative studies] Adequate representativeness of sample relative to analytic dimensions (in sense of cross-section, not statistical representativeness) e.g. not all 'volunteers'; not all one type of person when intervention is delivered to a range) [Quantitative studies] 
Response rate reported
What Works in Parenting Support: Online Database
Quantitative studies