Table 3. Number and percentage of studies reporting all elements of each dimension of external validity 1.
| External validity dimension | No./Total 2 | % | Studies |
|---|---|---|---|
| Reach and representativeness of
participants |
6/39 | 15 | NOURISH, PRIMROSE, Baby Milk Trial, INSIGHT, BLISS, POI |
| Reach and representativeness of
settings |
9/38 | 24 | ProKind, Baby Milk Trial, Minding the Baby, SLIMTIME, INSIGHT, BLISS,
POI, Healthy MOMS, Healthy Beginnings |
| Implementation and adaptation | 0/39 | 0 | None |
| Outcomes for decision making | 0/39 | 0 | None |
| Maintenance / institutionalisation | 1/39 | 3 | INSIGHT |
Notes:
1Laws et al. (adapted from Green et al.)
2No. taken as sum of no. of studies reporting yes or not applicable to each of the element. Total excludes any studies for which the external validity criterion was not applicable (e.g. Grow2Gether was a social media intervention therefore ‘research and representativeness of settings’ criterion was not applicable).