Age Started

Definition 1

The age of a person at the start of a specific event. (NCI Thesaurus)

Definition 2

The age of a patient on the first occurrence of an event, such as the first use of a medication. (NCI Thesaurus/DICOM)

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Age Group

Subgroups of populations based on age.

Age at Time of Vaccination

The age of the subject at the time of the vaccination.

Age at Menopause

The age at which permanent cessation of menses occurs.

Age at Menarche

Age of first menstruation. A risk factor for breast cancer

Age at First Live Birth

The age at which a woman gave birth to her first live child.

Age Appropriate Screening

Diagnostic tests designed to be performed at specific age markers.