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. 2015 Jun 23;10(6):e0130419. doi: 10.1371/journal.pone.0130419

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© 2015 Hayden et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Fig 3 — Abbreviations: TICS-m: Telephone interview for Cognitive Status-modified. Covariates included age, age², sex, sex*age, education, education*age, group, and group*age.