What is the name of the factor that comes before and paves the way for a later onset of the disorder? primary?

The factor that comes before and paves the way for a later onset of the disorder is called a symptom. Symptoms are signs which indicate and can help identify the disorder that a person is experiencing. The combination of these symptoms may result to a right or wrong diagnosis. 

Cpr? ? idk i heard it like five years ago on a medical course in primary