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Table 5 External validity dimensions for included studies

From: The impact of interventions to prevent obesity or improve obesity related behaviours in children (0–5 years) from socioeconomically disadvantaged and/or indigenous families: a systematic review

External validity dimension No (%) studies
Reach and representiveness of participants  
Target population described 32 (100)
Methods to recruit target population described 23 (72)
Individual inclusion and exclusion reported 23 (72)
Enrolment rate 20 (63)
Representiveness of participants described 3 (9)
Reach and representiveness of settings  
Target setting described 32 (100)
Methods to recruit target setting described 2 (6)
Setting inclusion and exclusion reported 6 (9)
Setting participation rate 4 (13)
Representiveness of settings described 0 (0)
Implementation and adaptation  
Intervention characteristics described 32 (100)
Time to deliver intervention described 25 (78)
Intervention exposure reported 22 (69)
Delivery agent described 30 (94)
Method to recruit delivery agent described 1 (3)
Delivery agent participation rate described 0 (0)
Training of delivery agent described 11 (34)
Intervention fidelity measured 5 (16)
Outcomes for decision makers  
Outcomes compared to standards 26 (81)
Adverse consequences reported 5 (16)
Effect moderator by participant characteristics 5 (16)
Effect moderator by setting/delivery agent 0 (0)
Dose response effect of the intervention 1 (3)
Intervention costs or cost effectiveness 3 (9)
Attrition rates reported 29 (91)
Differential attrition rates reported 7 (22)
Representiveness of completers/drop outs 8 (25)
Long term effects (>6 months) 17 (53)
Acceptability 16 (50)
Institutionalisation 13 (41)