Table 1.

Study design: a mixed qualitative-quantitative approach

Phase Activity	Objective	Subject recruitment	Number of sessions	Number of parents
				White	Black
1 Exploratory focus groups	To explore the broad range of factors that influence the decision	Phone calls to parents from a randomized list of children of any height, aged 9–14 years, from 9 primary care pediatric offices	13	31	40
2 Nominal group technique	To generate and prioritize key factors that influence the decision; to populate the survey		10	39	24
3 One-time survey	To allow for subgroup and regression analyses	In-person convenience sampling of parents of children (of any height and age) at 4 primary care pediatric offices	1,820 surveys completed	733	856
4 Explanatory focus groups	To explain why and how the key factors influence the decision	Same as in phases 1 and 2	12	38	39