A few off the top of my head:
(1) Signals gained from ways that a CV is formatted or written (e.g. indicating dyslexia or other neurological variances, especially those comorbid with other physiological disabilities)
(2) If a CV reports short tenure at companies with long breaks in between (e.g. chronic illnesses or flare-ups leading to burnout or medical leave)
(3) There are probably many unintuitive correlates irt interests, roles acquired, skillsets. Consider what experiences, institutions, skillsets and roles are more or less accessible to disabled folk than others.
(4) Most importantly: Disability is associated with lower education and lower economic opportunity, therefore supposed markers of success ("merit") in CVs may only reflect existing societal inequities. *
* This is one of the reasons meritocratic "blind" hiring processes are not as equitable as they might seem; they can reflect + re-entrench the current inequitable distribution of "merit".