Depends on what you mean as a "condition". In a medical record, smoking status is often stored as a top-level value tied directly to the patient, and also often coded into their condition list[0]. In the FHIR standard, a physician's observation of a patient's smoking history is usually represented with an observation resource, but often will be "upgraded" to a condition resource[1].

But, yeah, from a non-healthcare data standpoint, what a "condition" is really just depends on your definition.

[0] https://www.icd10data.com/ICD10CM/Codes/F01-F99/F10-F19/F17-...

[1] https://www.hl7.org/fhir/condition.html