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. Author manuscript; available in PMC: 2021 Jun 12.
Published in final edited form as: J Am Geriatr Soc. 2019 Jan 29;67(6):1174–1181. doi: 10.1111/jgs.15779

Figure 1. STROBE diagram for selection of TCA/GABA-analog users and non-users.

Figure 1.

aICD-9 codes for peripheral neuropathy: 250.60 and 250.62. bIn order to keep as many controls as possible, all subjects in the previous step were assigned January 2008 as the index date. Then the selection criteria were applied to identify eligible subjects. Controls needed for that month were then randomly selected from the eligible subjects. This process was repeated 35 more times for all the months from February 2008 to December 2010.