Baby-Led Introduction to SolidS (BLISS) study: a randomised controlled trial of a baby-led approach to complementary feeding

Table 2 Sample size calculations for secondary outcomes

	Reference data	Source of reference data	Difference detected^a	Number needed per group
	Mean (SD)
Energy self-regulation scale	3.9 (0.8)	[45]	0.4	63
Plasma ferritin (μg/L)	16.0 (0.6)	[65]	5.0	84

^a The difference that could be detected with 80 % power and a significance level of 5 %

ISSN: 1471-2431