▪ Abstract Over the past few years there has been growing interest in considering factors
defined at multiple levels in public health research. Multilevel analysis has emerged as one
analytical strategy that may partly address this need, by allowing the simultaneous
examination of group-level and individual-level factors. This paper reviews the rationale for
using multilevel analysis in public health research, summarizes the statistical methodology,
and highlights some of the research questions that have been addressed using these …