Table 3.

Power calculations for secondary outcomes

	MD*	ICC	Power
Height-for-age Z score at 2 years old	0.25	0.03	0.93
Weight-for-age Z score at 2 years old	0.3	0.01	0.98
Weight-for-height Z score at 2 years old	0.2	0.01	0.85
BSID Cognitive score at 1 year old	0.25	0.02	0.94
BSID Motor score at 2 years old	0.45	0.01	0.96
BSID Social-emotional score at 2 years old	0.3	0.03	0.90

*MD: standardised mean difference (SD of every BSID scale=15 scale points). MDs and ICCs are derived from our previous studies in Vietnam.^{41 42 44}

BSID, Bayley Scales of Infant and Toddler Development; ICC, intracluster correlation coefficient.