Question about a_stat / tau_stat fields in ADNI participants

[Shahzad ALi]

Dear Clinica team,

I’m working with the ADNI dataset converted to BIDS using Clinica, and noticed the fields a_stat and tau_stat in the participants' files. Could you please clarify how these amyloid and tau status variables are computed or extracted?

I’m particularly interested in how the Aβ+ / Aβ– status is determined for ADNI participants. Could someone please guide me on which ADNI files or references to check to obtain this information?

Thank you for your time and guidance!

Best regards,

ALI

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