Table 2.

Required sample size for 90% power in noninferiority aim.

ICCa	Sites, n		Study participants per site for analyses, n	Study participants recruited per site (allowing for 15% attrition), n
	HVb	MHPc
.001	16	16	17	20
.01	16	16	20	23
.02	16	16	25	29
.03	16	16	33	39
.04	16	16	49	58
.05	16	16	97	114
.001	15	15	19	22
.01	15	15	22	26
.02	15	15	28	33
.03	15	15	38	45
.04	15	15	62	73
.05	15	15	168	198

^aICC: intracluster correlation coefficient.

^bHV: home visiting.

^cMHP: mental health professional.