from pydantic import Field
from typing import Any, Optional, Union, List
from pydantic_schemaorg.MedicalStudy import MedicalStudy


class MedicalObservationalStudy(MedicalStudy):
    """An observational study is a type of medical study that attempts to infer the possible"
     "effect of a treatment through observation of a cohort of subjects over a period of time."
     "In an observational study, the assignment of subjects into treatment groups versus"
     "control groups is outside the control of the investigator. This is in contrast with controlled"
     "studies, such as the randomized controlled trials represented by MedicalTrial, where"
     "each subject is randomly assigned to a treatment group or a control group before the start"
     "of the treatment.

    See https://schema.org/MedicalObservationalStudy.

    """
    type_: str = Field("MedicalObservationalStudy", const=True, alias='@type')
    studyDesign: Any = Field(
        None,
        description="Specifics about the observational study design (enumerated).",
    )
    

MedicalObservationalStudy.update_forward_refs()
