Vocab word for describing pop at risk for a disease: age, race, etc. "epidemiology"?

[picmonic freak]

This is a pure brain fart right now... but can spmeone tell me the commonly used word when describing characteristics of the type of person at risk for a disease? I keep thinking "epidemiology"... but it doesn't sound right. eg. "what is the epidemiology for Craniopharyngioma?" to which someone would say: "Oh its actually bimodal... 50% of those who get it are above 20, with the second peak being close to 50".... yes that is just an age example.... but this term I'm looking for can also cover race, etc.

lol... this word I'm looking for is commonly used.... I'm just afraid the word is not "epidemiology". I only seem to find the wording I'm uncertain of in vignettes... I tried googling ut but got too much info.

Thanks for answering such a dumb question!

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[Rahas]

Risk factors?