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Protocol - Weight Loss/Gain

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Description

The protocol contains a question about the participant’s weight 1 year ago.*

*NOTE: This period can be modified for different periods. Depending on your hypothesis, you may want to modify the time interval as appropriate (e.g., 3 months, 6 months, 1 year).

Specific Instructions

The following protocol is part of a computerized interview. This may be used in a noncomputerized format. Also, the protocol may be used in personal and self-administered formats.

Note to PhenX User: The National Health and Nutrition Examination Survey (NHANES) does not ask proxy respondents about a child’s weight change. The weight change question for participants under age 16 years comes from Garmey et al. (2008).

Availability

Available

Protocol

Weight Loss/Gain


1.  How much did {you/SP*} weigh a year ago†? [If {you were/she was} pregnant a year ago, how much did {you/she} weigh before your pregnancy?]

ENTER WEIGHT IN POUNDS OR KILOGRAMS
DISPLAY OPTIONAL SENTENCE [If {you were/she was} pregnant . . .] ONLY IF SP IS FEMALE AND SP AGE IS 17 THROUGH 60.

|___|
[ ] 1 ENTER WEIGHT IN POUNDS
[ ] 2 ENTER WEIGHT IN KILOGRAMS
[ ] 7 REFUSED
[ ] 9 DON’T KNOW

|___|___|___|
ENTER NUMBER OF POUNDS 

OR

|___|___|___|
ENTER NUMBER OF KILOGRAMS 

OR

[ ] 777 REFUSED
[ ] 999 DON’T KNOW

* When the question is being asked of a proxy respondent, insert the participant’s name here.

†This time period can be modified for different time periods. Depending on your hypothesis, you may want to modify the time interval as appropriate (e.g., 3 months, 6 months, 1 year).
Personnel and Training Required

None

Equipment Needs

None

Requirements
Requirement CategoryRequired
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

Self-administered questionnaire

Lifestage

Infant, Toddler, Child, Adolescent, Adult, Senior

Participants

Participants aged 16 years or older or by knowledgeable adult proxy for children younger than 16 years of age

Selection Rationale

This National Health and Nutrition Examination Survey 2019-2020 protocol was selected as best practice methodology and is one of the most widely used protocols to obtain a weight loss/gain measurement. The studies from which these protocols are derived provide a valid national comparator database.

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
StandardNameIDSource
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), Weight History Questionnaire, 2019-2020

Source

Centers for Disease Control and Prevention, National Center for Health Statistics.  National Health and Nutritional Examination Survey (NHANES) 2019-2020. Weight History - WHQ (Question WHQ.053). Hyattsville, MD: U.S. Department of Health and Human Services, Centers for Disease Control and Prevention. 

General References

Garmey, E. G., Liu, Q., Sklar, C. A., Meacham, L. R., Mertens, A. C., Stovall, M. A., et al. (2008). Longitudinal changes in obesity and body mass index among adult survivors of childhood acute lymphoblastic leukemia: A report from the Childhood Cancer Survivor Study. Journal of Clinical Oncology, 26(28), 4639-4645. doi:10.1200/JCO.2008.16.3527

Protocol ID

21402

Variables
Export Variables
Variable Name Variable IDVariable DescriptiondbGaP Mapping
PX021402_Weight_Loss_Gain_Weight_One_Year_Ago
PX021402010001 How much did {you/SP*} weigh a year ago? [If more
{you were/she was} pregnant a year ago, how much did {you/she} weigh before your pregnancy?] show less
N/A
PX021402_Weight_Loss_Gain_Weight_One_Year_Ago_Kilograms
PX021402010003 How much did {you/SP*} weigh a year ago? [If more
{you were/she was} pregnant a year ago, how much did {you/she} weigh before your pregnancy?]. Kilograms show less
N/A
PX021402_Weight_Loss_Gain_Weight_One_Year_Ago_Pounds
PX021402010002 How much did {you/SP*} weigh a year ago? [If more
{you were/she was} pregnant a year ago, how much did {you/she} weigh before your pregnancy?]. Pounds show less
N/A
Anthropometrics
Measure Name

Weight Loss/Gain

Release Date

September 16, 2024

Definition

Change in weight over the past year

Purpose

This measure is collected to obtain information on an individual’s health status in relation to weight loss or weight gain over the designated time period (e.g., the past year).

Keywords

Anthropometrics, weight, body mass index, BMI, obesity, NHANES, gerontology, aging, geriatrics

Measure Protocols
Protocol ID Protocol Name
21402 Weight Loss/Gain
Publications

There are no publications listed for this protocol.