Loading…

Protocol - Height - Self-Reported Height

Add to My Toolkit
Description:

The questions in the protocol ask the study subject his or her height.

NOTE: Self-reported height values are considered to be less accurate. Self-reported height is subject to error and is used when measured height cannot be obtained.

Protocol:

How tall {are you/is [participant]†} without shoes? ENTER HEIGHT IN FEET AND INCHES OR METERS AND CENTIMETERS

|___|___| ENTER NUMBER OF FEET

AND |___|___| ENTER NUMBER OF INCHES

OR |___|___| ENTER NUMBER OF METERS

AND |___|___|___| ENTER NUMBER OF CENTIMETERS

OR

[ ] 7777 REFUSED

[ ] 9999 DON’T KNOW

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

*NOTE: Self-reported height values are considered to be less accurate. Self-reported height is subject to error and is used when measured height cannot be obtained.

Protocol Name from Source:

2007-2008 National Health and Nutritional Examination Survey (NHANES) Weight History Questionnaire

Availability:

Publicly available

Personnel and Training Required

The trained interviewer should be able to administer a questionnaire and be able to probe for information as necessary.

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

Life Stage:

Infant, Toddler, Child, Adolescent, Adult, Senior

Participants:

This measure includes four protocols, and each protocol relates to the age of the participant and his or her ability to stand up straight. A fourth protocol for self-reported height is included but is considered a protocol of last resort when direct measurement of height or its proxy is not possible.

Standing Height

The standing height protocol is used for participants 2 years of age or older who can stand unassisted.

Recumbent Length

The recumbent length protocol is used for all infants and children from birth through 47 months of age.

Knee Height

The knee height protocol was used for participants 60 years of age or older or for individuals who cannot stand unassisted.

Self-Reported Height*

Study subject aged 16 years or older or by a knowledgeable adult proxy for children younger than 16 years of age.

*NOTE: Self-reported height values are considered to be less accurate and are used only when measured height cannot be obtained.

Specific Instructions:

Three measurement protocols (Standing Height, Recumbent Height, and Knee Height) accommodate various groups of participants. Self-Reported Height should be used as a last resort only.

Several overarching, critical issues for high-quality data collection of anthropometric measures that optimize the data in gene-environment etiologic research include (1) the need for training (and retraining) 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 the measurement units of data collection; and (5) use of required and properly calibrated equipment.

The notion of recommending replicate measurements comes from the reduction in random errors of measurement and accompanying improved measurement reliability when the mean of multiple measurements is used rather than the a single measurement. This improvement in measurement reliability, however, depends on the reliability of a single measurement in the hands of the data collectors in a particular study (Himes, 1989). For example, if a measure such as standing height in a given study has a measurement reliability of 0.95 (expressed as an intraclass correlation coefficient), taking a second measurement and using the mean of the two measurements in analyses will improve the reliability to only 0.97, yielding only a 2% reduction in error variance for the additional effort. If, in the same study, the reliability of a single triceps skinfold measurement was 0.85, using the mean, including a replicate measurement, would raise the reliability to 0.92 and yield a 7% reduction in error variance, more than a three-fold improvement compared with recumbent length. Because the benefits of taking replicate measurements are so closely linked with the existing measurement reliability, it is recommended that as a part of the training of those who will be collecting anthropometry data, a reliability study be conducted that will yield measurement reliability estimates for the data collectors, protocols, settings, and participants involved in that particular study (Himes, 1989). If the measurement reliability for a single measurement is greater than or equal to 0.95, the recommendation is that replicate measurement are not necessary and will yield little practical benefit. If the measurement reliability is less than 0.95, the recommendation is to include replicate measurements as prescribed.

If replicate measurements are indicated because of relatively low reliability, a second measurement should be taken, including repositioning the participant. A third measurement should be taken if the first two measurements differ by more than 1.0 cm. If it is necessary to take a third measurement, the two closest measurements are averaged. Should the third measurement fall equally between the first two measurements, all three should be averaged.

Selection Rationale

The National Health and Nutrition Examination Survey 2007-2008 protocols were selected as best practice methodology and are the most widely used protocols to assess height.

Language

English, Spanish

Standards
StandardNameIDSource
Common Data Elements (CDE) Person Self-Report Height Value 2793242 CDE Browser
Logical Observation Identifiers Names and Codes (LOINC) Self reported height proto 62296-9 LOINC
Derived Variables

Body Mass Index (BMI), Waist-to-Height Ratio (WtHR)

Process and Review

The Expert Review Panel #1 reviewed the measures in the Anthropometrics, Diabetes, Physical Activity and Physical Fitness, and Nutrition and Dietary Supplements domains.

Guidance from the ERP includes:

• Revised descriptions of measure

Back-compatible: no changes to Data Dictionary

Previous version in Toolkit archive (link)

Source

Centers for Disease Control and Prevention, National Center for Health Statistics. (2007). National Health and Nutritional Examination Survey (NHANES) 2007-2008 Questionnaire. WEIGHT HISTORY - WHQ. Hyattsville, MD: U.S. Department of Health and Human Services, Centers for Disease Control and Prevention. (The height question is included in the Weight History Questionnaire; see question #010.)

General References

None

Protocol ID:

20704

Variables:
Export Variables
Variable NameVariable IDVariable DescriptionVersiondbGaP Mapping
PX020704_Self_Reported_Height_Centimeters PX020704010200 How tall {are you/is [participant]} without shoes? 4 N/A
PX020704_Self_Reported_Height_Coded PX020704010500 How tall {are you/is [participant]} without shoes? 4 N/A
PX020704_Self_Reported_Height_Feet PX020704010300 How tall {are you/is [participant]} without shoes? 4 N/A
PX020704_Self_Reported_Height_Inches PX020704010400 How tall {are you/is [participant]} without shoes? 4 N/A
PX020704_Self_Reported_Height_Meters PX020704010100 How tall {are you/is [participant]} without shoes? 4 N/A
PX020704_Self_Reported_Height_Proxy_Name PX020704020000 When the question is being asked of a proxy respondent, insert the participant's name here 4 N/A
Research Domain Information
Measure Name:

Height

Release Date:

October 1, 2015

Definition

Height is the distance from the top of the participant’s head to the heels of his or her feet (i.e., the vertical length).

Purpose

Height or stature is used to assess body size and bone length. Recumbent length is used to measure length of infants, and knee height may be used to estimate height when stature cannot be measured in older adults.

Keywords

Anthropometrics, body mass index, BMI, stature, Waist-to-Height Ratio, WHtR, NHANES