I have not put this into some formalized list or table but I always think in terms of symptoms of Mythos Exposure when I run CoC. Stuff like fobias, anxiety, paranoia, nightmares, hypervigilance, hallucinations, loss of appetite, insomnia, etc. Somatic symptoms may also be appropriate: heart palpitations, stomach aches, nausea, diarrhea, skin conditions, etc.