Protocol - Current Age

Personnel and Training Required

None

Equipment Needs

None

Requirements

Requirement Category	Required
Major equipment	No
Specialized training	No
Specialized requirements for biospecimen collection	No
Average time of greater than 15 minutes in an unaffected individual	No

Mode of Administration

Interviewer-administered questionnaire

Lifestage

Infant, Toddler, Child, Adolescent, Adult, Senior, Pregnancy

Participants

Any age.

Selection Rationale

Age is a primary predictor of disease and the most important potential confounder in epidemiologic studies.

Age at date of interview or exam can be compared to age in future follow-up interviews or exams for longitudinal research purposes.

Vetted against several other current age questions, the National Health and Nutrition Examination Survey (NHANES) question was selected because it included the date of birth (DOB) and a follow-up question to collect current age if the respondent did not know his or her DOB.

Language

Chinese, English, Spanish

While the English version of this protocol has been updated, the available translations have not and reflect a previous version. These differences may impact the compatibility between the English and Spanish/Chinese versions. It is the responsibility of the investigator to determine if the translations are sufficiently compatible with the English version for their research and subsequent analysis.

Standards

Standard	Name	ID	Source

Derived Variables

None

Process and Review

The PhenX Steering Committee (SC) reviewed this protocol in October 2023. Guidance from the SC includes:

• Updated protocol

Protocol Name from Source

National Health and Nutrition Examination Survey (NHANES), 2019-2020

Source

Centers for Disease Control and Prevention, National Center for Health Statistics.  National Health and Nutritional Examination Survey (NHANES) 2019-2020. Screener Module 1 (Question numbers: SCQ.290 and SCQ.292). Hyattsville, MD: U.S. Department of Health and Human Services, Centers for Disease Control and Prevention. 

General References

Public Population Project in Genomics (P3G) Data Shaper.

Protocol ID

10102

Variables

Export Variables

Variable Name	Variable ID	Variable Description	dbGaP Mapping
PX010102_Age_Birthdate
	PX010102010000	What is your birthdate?	N/A
PX010102_Age_Birthdate_Dont_Know
	PX010102010100	What is your birthdate? Don't Know or Refused	N/A
PX010102_Age_Old
	PX010102020000	How old are you?	N/A
PX010102_Age_Old_Dont_Know
	PX010102020100	How old are you?	N/A

Demographics

Measure Name

Current Age

Release Date

September 16, 2024

Definition

Question to determine the respondent’s current age using his or her date of birth.

Purpose

Current age is a critical component of a respondent’s demographic background. Date of birth (DOB)/current age is essential to medical research because it captures the age at the time of the clinical visit or diagnosis. Age is related to nearly all diseases and conditions and is the strongest potential confounder of other effects on these processes. Current age is often used to stratify respondents for more valid comparison (e.g., obesity of males aged 40-45 in Mississippi).

Keywords

Demographics, National Center for Health Statistics, NCHS, Centers for Disease Control and Prevention, CDC, age, date of birth, DOB, National Health and Nutrition Examination Survey, NHANES, Demographics-Populations with HD

Measure Protocols

Protocol ID	Protocol Name
10102	Current Age

Publications

There are no publications listed for this protocol.