El acrónimo no parece castellano sino que, como tantas veces ocurre en este ámbito, podría tratarse de un acrónimo original inglés.
Sin más contexto, por ejemplo,
Corona disease anxiety scale (CDAS)
Cancer data access system (CDAS)
Corah Dental Anxiety Scale (CDAS)
Confidentiality Agreements (CDAs)
[a Confidentiality Disclosure Agreement (CDA)]

Sin embargo, atendiendo a la nota sobre polineuropatía, tal vez;
CIDP Disease Activity Status (CDAS); escala de actividad de enfermedad -polineuropatía desmielinizante inflamatoria crónica (CIDP)

Defining long-term outcomes in chronic inflammatory demyelinating polyneuropathy (CIDP) has been complicated by varying definitions of treatment response and differing scales measuring impairment or disability. An expert panel was convened to devise a CIDP Disease Activity Status (CDAS) and to classify long-term outcome by applying it to 106 patients with a consensus diagnosis of CIDP.
https://pubmed.ncbi.nlm.nih.gov/21199104/


Algo más de contexto parece pertinente para poder incrementar la seguridad de la respuesta.

J Neurol. 2016 Oct 15;369:204-209. doi: 10.1016/j.jns.2016.08.034. Epub 2016 Aug 16.
Disease activity in chronic inflammatory demyelinating polyneuropathy.

Abstract
Introduction: Evaluation of disease status in patients with chronic inflammatory demyelinating polyneuropathy (CIDP) is often done by a combination of clinical evaluation and electrodiagnostic studies. A CIDP disease activity status (CDAS) was developed to standardize outcomes in CIDP patients. We aimed to determine if the CDAS was concordant with classical evaluation and whether CDAS enables benchmarking of CIDP.