Estimation of Chronic Illness Severity Based on Machine Learning Methods

Table 2

Features of chronic illness.

No	Factor	Information factor	Description
1	Age	Numerical	Age of a user
2	Sex	Numerical	Sex of a user
3	Condition	Nominal	An illness or diagnosis which is rated on a scale of 0 to 4
4	Symptom	Nominal	Self-explanatory, also rated on a 0–4 scale
5	Treatment	Nominal	Anything a patient uses to improve their symptoms
6	Tag	Nominal	A string representing an environmental factor
7	Food	Nominal	Food seeded from the USDA database or manually added
8	Weather	Numerical	Weather information based on user’s postal code
9	Check-in date	Nominal	The check-in date of the user