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. Author manuscript; available in PMC: 2021 Jul 1.
Published in final edited form as: J Head Trauma Rehabil. 2020 Jul-Aug;35(4):E320–E329. doi: 10.1097/HTR.0000000000000552

Figure 1. Sampling of respondents.

Figure 1.

Figure Legend: TBI is defined as injury to the head or neck resulting in LOC and/or PTA. Treatment in a hospital for the head or neck injury was not required in order for a participant to be categorized as having had a TBI. The study sample was identified in the following manner: respondents whose data were analyzed for this study were non-proxy respondents to the 2014 wave of the Health and Retirement Study (HRS) randomly assigned to participate in a traumatic brain injury (TBI) module. Text in grey represents respondents excluded from this study.