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. Author manuscript; available in PMC: 2017 Apr 1.
Published in final edited form as: Am J Obstet Gynecol. 2015 Nov 4;214(4):529.e1–529.e9. doi: 10.1016/j.ajog.2015.10.929

Figure 1. Analytic sample selection, Medical Expenditure Panel Survey 2008–2012.

Figure 1

Figure 1 is a flow chart depicting the steps in narrowing the sample from the full number of individuals available in the data source to the number included in our analyses.