Secondary Data Analysis: Using existing data to answer new questions.

INTRODUCTION: Secondary data analysis is a cost-effective, accessible, and efficient means of utilizing existing data to answer new research questions. METHOD: The manuscript provides an overview of the secondary data analysis process, as well as benefits and limitations inherent in the research method. RESULTS: An exemplar of pediatric focused research using a publicly available dataset is presented to facilitate understanding of the process. DISCUSSION: Novice and experienced researchers benefit from exploring the quantitative and qualitative secondary data analysis options available.