Protocol - Weight - Self-Reported Weight
- Birth Weight - Birth Weight Abstracted from Medical Records
- Birth Weight - Measured Weight at Birth
- Birth Weight - Proxy Reported Birth Weight
- Body Mass Index
- Ethnicity and Race
- Height - Knee Height
- Total Pregnancy Weight Gain - Abstracted From Prenatal Charts
- Total Pregnancy Weight Gain - Self-Reported Weight Gain
- Total Pregnancy Weight Gain - Weight Measured During Gestation
- Waist Circumference - Framingham Heart Study
- Waist Circumference - Waist Circumference NCFS
Description
The respondent provides his/her self-reported weight.
Specific Instructions
The PhenX Anthropometrics Working Group strongly recommends the assessment of weight using a measured protocol. Self-reported weight values are considered to be less accurate. Self-reported weight is subject to error and is used when measured weight cannot be obtained. Self-reported weight should be collected only as a last resort. Please indicate how the weight was collected (i.e., measured vs. self-reported).
In instances where both self-reported and measured weight are collected, collect the self-reported weight before the measured weight.
There are several overarching, critical issues for high-quality data collection of anthropometric measures that optimize the data in gene-environment etiologic research. These issues include: 1) the need for training (and re-training) of study staff in anthropometric data collection; 2) duplicate collection of measurements, especially under field conditions; 3) use of more than one person for proper collection of measurements where required; 4) accurate recording of the protocols and measurement units of data collection; and 5) use of required and properly calibrated equipment.
Self-Reported Weight can be used in a personal or self-administered interview.
When a woman is pregnant, her weight increases, and it is assumed that the information desired is her usual/nonpregnant weight. Thus, it is necessary to inquire whether a woman is pregnant, and if she is pregnant, to inquire about her weight before pregnancy as opposed to her actual/current weight.
Availability
Protocol
Self-Reported Weight
1. How much {do you/does SP} weigh without clothes or shoes? [If {you are/she is} currently pregnant, how much
did {you/she} weigh before your pregnancy?]
RECORD CURRENT WEIGHT. ENTER WEIGHT IN POUNDS OR KILOGRAMS.
|___|
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
77777[ ]REFUSED
99999[ ]DON’T KNOW
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
Participants
All ages
Selection Rationale
Weight measurements are used to calculate body mass index, assess nutritional status, and predict morbidity and mortality. Self-reported weight was included because it gives another way to monitor obesity (as used in Centers for Disease Control and Prevention studies). Note that the self-reported weight is less accurate than a measured weight and should be used only as a backup or a last resort.
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), Anthropometry Procedures Manual, 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.025). Hyattsville, MD: U.S. Department of Health and Human Services, Centers for Disease Control and Prevention.
Certification for the Spanish translation can be found here.
General References
None
Protocol ID
21504
Variables
Export Variables| Variable Name | Variable ID | Variable Description | dbGaP Mapping | |
|---|---|---|---|---|
| PX021504_Self_Reported_Weight_Kg | ||||
| PX021504010300 | ENTER NUMBER OF KILOGRAMS | N/A | ||
| PX021504_Self_Reported_Weight_Lbs | ||||
| PX021504010100 | ENTER NUMBER OF POUNDS | N/A | ||
| PX021504_Self_Reported_Weight_Response | ||||
| PX021504010200 | RECORD CURRENT WEIGHT. ENTER WEIGHT IN more | N/A | ||
| PX021504_Self_Reported_Weight_Uom | ||||
| PX021504010000 | How much {do you/does SP} weigh without more | N/A | ||
Measure Name
Weight
Release Date
September 16, 2024
Definition
Current Weight - Measured Current measured weight is the weight of the participant in kilograms. Current Weight - Self-Reported* Self-reported weight is the weight in kilograms or pounds as reported by the participant.
*NOTE: Self-reported weight values are considered to be less accurate and are used only when measured weight cannot be obtained.
Purpose
Current weight is used to assess a child’s growth and development and an adult’s current health status. Overweight and obese status is associated with several serious comorbidities, including type 2 diabetes, cardiovascular disease, hypertension, and obstructive sleep apnea.
Keywords
Anthropometrics, body mass index, BMI, obesity, ponderal index, weight for length, NHANES
Measure Protocols
| Protocol ID | Protocol Name |
|---|---|
| 21503 | Weight - Measured Weight |
| 21504 | Weight - Self-Reported Weight |
Publications
There are no publications listed for this protocol.