Quantifying the advantages of conducting a prospective meta-analysis (PMA): a case study of early childhood obesity prevention

Table 3 Power to detect a − 0.12 mean difference in BMI z-scores for the individual trials and the EPOCH PMA

Trial	No. of participants	Power to detect observed mean difference of − 0.12
Healthy Beginnings	667	0.34
InFANT	698	0.29
NOURISH	542	0.35
POI.nz	289	0.16
Combined to EPOCH PMA	2196	0.83

Note that each of the included trials was individually powered to detect differences in their respective primary outcomes

ISSN: 1745-6215