Scientific Data Documentation
Examination Data
Third National Health and Nutrition Examination Survey, 1988-91
File Number 76010
SELECTED LABORATORY AND MOBILE EXAMINATION CENTER DATA
Version 1, September 1995
The third National Health and Nutrition Examination Survey (NHANES III) was
conducted from October 1988 through October 1994. The data presented in
this publication and on the accompanying data file are from the first three
years of the six year survey.
Persons 2 months of age and older
Number of persons in 1988-91 sample: 20277
Number of persons in 1988-91 interviewed: 17464
Number of persons in 1988-91 examined: 15884
CAUTION BEFORE USING THIS DATA FILE, PLEASE READ THIS PAGE
o It is essential that you have a copy of "Plan and Operation of the
Third National Health and Nutrition Examination Survey, 1988-94" DHHS
Publication No. (PHS) 94-1308, and "Sample design: third National
Health and Nutrition Examination Survey" DHHS Publication No. (PHS) 92-
1387, before conducting analyses of the data on this data file. These
two publications are available from the Government Printing Office at
the address below. The Plan and Operation report is GPO Stock #017-022-
01260-0 and costs $25.00. The Sample Design report is GPO Stock
#017-022-01166-2 and costs $2.25.
Superintendent of Documents
U.S. Government Printing Office
Washington, D.C. 20402-9325
(202) 783-3238
o New questions were added and the wording of some questions was changed
during the course of the six-year survey. Users should be aware that
these changes may account for large numbers of records containing
blanks in these variables. In particular, the Family Questionnaire
section B on Health Insurance and section F on Family Characteristics
contain quite a few questions that were changed during the survey.
There were three different versions of some of those questions.
o Two aspects of NHANES III, especially, should be taken into account
when conducting any analyses: the sample weights and the complex survey
design. With the extensive oversampling of blacks, Mexican Americans,
young children and older adults in NHANES III, it is IMPERATIVE that
sample weights be used in all analyses in order to interpret the
findings correctly.
o Examine the range and frequency of values of a variable before
conducting analyses of data. The range may include unusual or
unexpected values. The frequency counts may be useful to determine
which analyses may be worthwhile.
o Interviewers rated the reliability of responses at the completion of
interviews. While all data collected are presented on this data file,
it is strongly recommended that responses rated "unreliable" should be
omitted from analyses.
o The Public Health Service Act (Section 308(d)) provides that the data
collected by the National Center for Health Statistics (NCHS), Centers
for Disease Control and Prevention, may be used ONLY for the purpose of
health statistical reporting and analysis. Any effort to determine the
identity of any reported case is prohibited by this law. NCHS does all
it can to assure that the identity of data subjects cannot be
disclosed. All direct identifiers, as well as any characteristics that
might lead to identification, are omitted from the dataset. Any
intentional identification or disclosure of a person or establishment
violates the assurances of confidentiality given to the providers of
the information. Therefore, users will:
1. Use the data in this dataset for statistical reporting and analysis
only.
2. Make no use of the identity of any person or establishment discovered
inadvertently and advise the Director, NCHS, of any such discovery.
3. Not link this dataset with individually identifiable data from other
NCHS or non-NCHS datasets.
By using these data, you signify your agreement to comply with the above-
stated statutorily based requirements.
PREFACE
This Public Use Data File has been edited very carefully. Nevertheless, due
especially to the large number of data items, some errors may have gone
undetected. Please bring to the attention of NCHS any errors in the data
file or the documentation.
In publications, please acknowledge NCHS as the original data source. The
acknowledgment should include a disclaimer crediting the authors for
analyses, interpretations, and conclusions; NCHS should be cited as being
responsible for only the collection and processing of the data. In
addition, NCHS requests that the acronym NHANES be placed in the abstracts
of journal articles and other publications based on data from this survey in
order to facilitate the retrieval of such materials through automated
bibliographic searches. Please send reprints of journal articles and other
publications that include data from this tape to NCHS at the address below.
Division of Health Examination Statistics
Use of NHANES Data
National Center for Health Statistics
6252 Belcrest Road - Room 1000
Hyattsville, Maryland 20782
A suggested citation for publications using data from the first three years
of NHANES III is: "Source: National Center for Health Statistics, NHANES
III, 1988-91". This citation should also appear at the bottom of all tables
containing NHANES III data from 1988-91.
Public Use Data Files for the third National Health and Nutrition
Examination Survey will be released through the National Technical
Information Service (NTIS) as soon as the data have been edited, validated,
and documented for all six years. The data files will be available for
purchase from NTIS by March, 1996. A list of NCHS Public Use Data Tapes
that can be purchased from NTIS may be obtained by writing the Data
Dissemination Branch, NCHS. A diskette containing an electronic
bibliography of journal articles citing data from all of the Health
Examination Surveys and National Health and Nutrition Examination Surveys is
also available by writing to the Data Dissemination Branch, NCHS. A version
of the SETS software package will be available on CD-ROM containing NHANES
III data. Information about the CD-ROM/SETS version of NHANES III data can
be obtained from the Data Dissemination Branch.
Data Dissemination Branch
National Center for Health Statistics
6525 Belcrest Road - Room 1018
Hyattsville, Maryland 20782
(301) 436-8500
NTIS can be contacted directly at:
NTIS-Computer Products Office
5285 Port Royal Road
Springfield, Virginia 22161
(703) 487-4807
GENERAL NOTES
o Numeric responses:
Users should pay careful attention to questions throughout NHANES III
forms that are coded using two variables to record a numeric response.
The first variable contains the numeric portion of the response and
the second variable contains the units of measure. All of these
questions were recoded and replaced with standardized variables. For
example, responses in days, weeks, or months were recoded to number of
times per month.
o Rounding:
Responses that included fractional answers were rounded off when the
code categories were integers only. Fractions of less than 1/2 were
dropped; fractions of 1/2 or more were rounded up to the next whole integer.
An example would be a response of 2 1/2 years which was rounded up to
3 years. Rounding was not done if units of measure allowed conversion of
fractional responses to an integer response. For example, a response of "1
1/2 packs of cigarettes" was converted to 30 cigarettes since the variable
allowed for expression of the answer in cigarettes as well as packs.
o Ranges:
If a response was given as a range or an imprecise number, rules were
used to code the response if the interviewer was unable to obtain an
exact number. For example, if a person said "in my early 50's", "in my mid-
30's", or "in my late 20's", the response was coded as 53 for "early 50's",
35 for "mid-30's", and 28 for "late 20's". If a range was given, the mid-
point of the range was used and any fractions were rounded off. For
example, a response of "30-35" was coded as 33.
o Which AGE variable to use:
Each sample person has an age at screening interview which is almost
always calculated using the date of interview and the date of birth.
For each examined sample person, there is an age at exam calculated
using date of exam and date of birth. Since the sample person was
selected into the survey based on age at screening interview and since
this determined which components of the survey he/she was eligible to
receive, the most appropriate age to use in any NHANES III analyses is
"age at interview" (HSAGEI and HSAGEU). There are a few exceptions to
this rule. In certain analyses of infants and young children, age at
exam may be a more appropriate choice because of the many changes that
occur in growth and development during this time period. In general,
age at screening interview is the appropriate age variable to use in
most NHANES III analyses.
o Multiple responses possible:
The user should be aware that there are a number of questions asked
during the NHANES III interviews where multiple affirmative responses
were possible. In these situations, the number of "yes" responses to
the question will be more than the number of sample persons who were
asked the question.
o Sections of questionnaires not included in data file:
Some questions or sections of questionnaires are not released on public
use data files. These data are the sensitive and personal data that were
collected in the survey for the purpose of longitudinal follow-up studies
and are not released by NCHS for confidentiality reasons. Some sections
of the questionnaires were used for administrative purposes (Diabetes Review
in the household youth questionnaire) and are not being released. Other
sections (Vitamin, Mineral and Medicine Usage) are still being processed
and will be released at a later time.
o Changes in questionnaires during six-year survey:
Every attempt was made to keep the questions exactly the same during the
entire six years of NHANES III. However, because of certain Public Health
Service requirements, some additional questions were added at the end of
the third year of NHANES III. The primary areas where these changes
occurred were in the household family questionnaire but other components
changed as well. The family questionnaire changes occurred in the areas
of income questions, food security, and health insurance coverage. The
NHANES III public release data files have been created to reflect the
version of the questionnaires published in "Plan and Operation of the
Third National Health and Nutrition Examination Survey, 1988-94", that
is, the versions used at the end of the second phase of the survey. For
those "new" questions not asked until the last three years of the survey,
all the data are blank for those persons interviewed during the first three
years.
o Unlikely or inconsistent responses or data values:
The NHANES III data were edited carefully for skip pattern and range
pattern and range errors as well as for consistency between related
questions. Somewhat arbitrary but reasonable limits were usually set
regarding what extreme values were possible or impossible. If a response
was determined to be impossible, that response was edited and recoded
"blank but applicable". Food frequency questions were and exception;
even if the frequency stated seemed highly improbable, answers were
not changed. Analysts are free to exclude extreme values if they wish.
Respondents were not always consistent in their answers to questions,
either because of misunderstanding or not remembering precisely.
Inconsistent responses were examined, but if it could not be determined
which was the "correct" response, then both values may have been left as
coded.
o Other and specify responses:
Responses to "other" and "specify" were recoded ("backcoded") to existing
to existing categories, if possible. For responses that could not be
recoded, new code categories were created if the information was deemed
analytically useful. Caution should be used in interpreting data from
these new categories because there is no way of knowing which other
respondents would have selected one of the new categories if they had
been given the options.
NHANES III Examination Data File
------------------------------------------------------------------------
DATASET=EXAM
N=15884 DOCUMENTATION DATE=8/24/95
------------------------------------------------------------------------
General Data
------------------------------------------------------------------------
Positions Item description Source
SAS name Counts and code and notes
------------------------------------------------------------------------
1-5 Sample person sequence number
SEQN 15884 00003-22226
NHANES III Examination Data File
------------------------------------------------------------------------
Body Measures Component
------------------------------------------------------------------------
Positions Item description Source
SAS name Counts and code and notes
------------------------------------------------------------------------
6-10 Measured height in centimeters
BMPHT 14071 073.6-199.8
84 88888 Blank but applicable
1729 Blank
11-16 Measured weight in kilograms
BMPWT 14033 006.85-206.44
122 888888 Blank but applicable
1729 Blank
17-21 Body mass index
BMPBMI 13996 10.54-67.31
159 88888 Blank but applicable
1729 Blank
NHANES III Examination Data File
------------------------------------------------------------------------
Physician's Examination Component
------------------------------------------------------------------------
Positions Item description Source
SAS name Counts and code and notes
------------------------------------------------------------------------
22-24 First systolic blood pressure
PEP6GK1 8327 064-244
3782 888 Blank but applicable
3775 Blank
25-27 First diastolic blood pressure
PEP6GK5 47 000
8281 006-134
3781 888 Blank but applicable
3775 Blank
28-30 Second systolic blood pressure
PEP6HK1 8315 068-242
3794 888 Blank but applicable
3775 Blank
31-33 Second diastolic blood pressure
PEP6HK5 22 000
8296 006-126
3791 888 Blank but applicable
3775 Blank
34-36 Third systolic blood pressure
PEP6IK1 8297 068-238
3812 888 Blank but applicable
3775 Blank
37-39 Third diastolic blood pressure
PEP6IK5 25 000
8271 010-128
3813 888 Blank but applicable
3775 Blank
NHANES III Examination Data File
------------------------------------------------------------------------
24-Hour Dietary Recall Component
------------------------------------------------------------------------
Positions Item description Source
SAS name Counts and code and notes
------------------------------------------------------------------------
40 Recall status code
DRPSTAT 14784 1 Reliable and complete
345 2 Reliable, but incomplete
102 3 Unreliable
29 4 Interview lost due to computer
malfunction
141 5 Breastfeeding infant or child
229 8 Blank but applicable
254 Blank
41-42 Recall day
DRPRDAY 1279 01 Sunday
1463 02 Monday
1773 03 Tuesday
2861 04 Wednesday
2638 05 Thursday
3974 06 Friday
1404 07 Saturday
238 88 Blank but applicable
254 Blank
43 Respondent for the 24-hour dietary
DRPRESP recall interview
10325 1 Sample Person, i.e. self reported
4554 2 Proxy
493 3 Sample Person and Proxy
258 8 Blank but applicable
254 Blank
44 Language of 24-hour dietary recall
DRPLANG interview
13248 1 English
1895 2 Spanish
133 3 English and Spanish
96 4 Other language
258 8 Blank but applicable
254 Blank
NHANES III Examination Data File
------------------------------------------------------------------------
------------------------------------------------------------------------
Positions Item description Source
SAS name Counts and code and notes
------------------------------------------------------------------------
45 How does the amount of food consumed
DRPQ1 yesterday compare with (your/his/her)
usual consumption for that day of the
week? Was it...
282 1 Much more than usual
13243 2 Usual
1491 3 Much less than usual
390 8 Blank but applicable
224 9 Don't know
254 Blank
46-51 How much plain drinking water do you
DRPQ2A usually drink in a 24-hour period?
Include only plain tap or spring water.
In fluid ounces
14810 000000-000512
333 888888 Blank but applicable
487 999999 Don't know
254 Blank
52 What type of salt do you usually add to
DRPQ3 your food at the table?
8079 0 None
6469 2 Ordinary salt
432 3 Lite salt
162 4 Salt substitute
336 8 Blank but applicable
152 9 Don't know
254 Blank
53 How often do you add salt at the table?
DRPQ4
NOTE: Respondents were asked this
question if their response to DRPQ3 was
either ordinary salt, lite salt, salt
substitute or don't know.
2545 1 Rarely
2613 2 Occasionally
1988 3 Very often
339 8 Blank but applicable
66 9 Don't know
8333 Blank
NHANES III Examination Data File
------------------------------------------------------------------------
------------------------------------------------------------------------
Positions Item description Source
SAS name Counts and code and notes
------------------------------------------------------------------------
54-55 Thinking about the past month, how many
DRPQ5 days did you have no food or money to
buy food?
14378 00 None
777 01-31
6 66 Greater than zero number of days,
not further specified
352 88 Blank but applicable
117 99 Don't know
254 Blank
56 Is that because there wasn't enough
DRPQ6 money to buy food or another reason?
NOTE: Respondents were asked this
question only if their response to
question DRPQ5 was '01-31' days or '66',
which means 'greater than zero number of
days, not further specified').
623 1 Not enough money
150 2 Another reason
358 8 Blank but applicable
4 9 Don't know
14749 Blank
57 During the past month, did (you/___)
DRPQ7 skip any meals because there wasn't
enough food or money to buy food?
NOTE: Respondents were asked this
question only if they did not answer
'Another reason' to question DRPQ6.
531 1 Yes
14555 2 No
355 8 Blank but applicable
39 9 Don't know
404 Blank
NHANES III Examination Data File
------------------------------------------------------------------------
------------------------------------------------------------------------
Positions Item description Source
SAS name Counts and code and notes
------------------------------------------------------------------------
58-59 How many days in the past month did
DRPQ8 (you/___) skip any meals because there
wasn't enough food or money to buy food?
NOTE: Respondents were asked this
question only if they answered 'Yes' to
question DRPQ7 or they did not answer
'Another reason' to question DRPQ6.
518 01-30
2 66 Greater than zero number of days,
not further specified
355 88 Blank but applicable
11 99 Don't know
14998 Blank
60 Did (you/___) skip any meals yesterday
DRPQ9 because there wasn't enough food or
money to buy food?
NOTE: Respondents were asked this
question only if they answered 'Yes' or
"Don't know" to question DRPQ7 or they
did not answer 'Another reason' to
question DRPQ6.
110 1 Yes
448 2 No
355 8 Blank but applicable
12 9 Don't know
14959 Blank
61 During the past month, were there any
DRPQ10 days when (you/__) did not eat at all
because there wasn't enough food or
money to buy food?
NOTE: Respondents were asked this
question only if they answered 'Yes' or
"Don't know" to question DRPQ7 or they
did not answer 'Another reason' to
question DRPQ6.
101 1 Yes
457 2 No
355 8 Blank but applicable
12 9 Don't know
14959 Blank
NHANES III Examination Data File
------------------------------------------------------------------------
------------------------------------------------------------------------
Positions Item description Source
SAS name Counts and code and notes
------------------------------------------------------------------------
62-63 In the past month, how many days were
DRPQ11 there when (you/___) didn't eat at all?
NOTE: Respondents answered this question
only if they answered 'Yes' to question
DRPQ10 or they did not answer 'Another
reason' to question DRPQ6.
99 01-12
1 66 Greater than zero number of days,
not further specified
355 88 Blank but applicable
1 99 Don't know
15428 Blank
64 Are you the person who usually prepares
DRPQ12 the meals at home?
8739 1
5465 2
947 3 Shared preparation
116 4 Food not prepared at home
360 8 Blank but applicable
3 9 Don't know
254 Blank
65-73 Total grams of foods and beverages
DRPGW consumed
14784 0000017.2-018841.87
846 888888888 Blank but applicable
254 Blank
74-82 Water (gm)
DRPNWATE 14784 000006.32-018202.18
846 888888888 Blank but applicable
254 Blank
83-91 Food energy (kcal)
DRPNKCAL 14784 0000039.3-017895.49
846 888888888 Blank but applicable
254 Blank
92-100 Protein (gm)
DRPNPROT 14784 000000000-000712.03
846 888888888 Blank but applicable
254 Blank
NHANES III Examination Data File
------------------------------------------------------------------------
------------------------------------------------------------------------
Positions Item description Source
SAS name Counts and code and notes
------------------------------------------------------------------------
101-109 Total fat (gm)
DRPNTFAT 14784 000000000-000884.68
846 888888888 Blank but applicable
254 Blank
110-118 Total saturated fatty acids (gm)
DRPNSFAT 14784 000000000-000289.41
846 888888888 Blank but applicable
254 Blank
119-127 Total monounsaturated fatty acids (gm)
DRPNMFAT 14784 000000000-000350.01
846 888888888 Blank but applicable
254 Blank
128-136 Total polyunsaturated fatty acids (gm)
DRPNPFAT 14784 000000000-000202.59
846 888888888 Blank but applicable
254 Blank
137-145 Cholesterol (mg)
DRPNCHOL 14784 000000000-003787.18
846 888888888 Blank but applicable
254 Blank
146-154 Carbohydrate (gm)
DRPNCARB 14784 000000000-002116.18
846 888888888 Blank but applicable
254 Blank
155-163 Total dietary fiber (gm)
DRPNFIBE 14784 000000000-000108.43
846 888888888 Blank but applicable
254 Blank
164-172 Alcohol (gm)
DRPNALCO 14784 000000000-000570.24
846 888888888 Blank but applicable
254 Blank
173-181 Vitamin A (IU)
DRPNVAIU 14784 000000000-142658.51
846 888888888 Blank but applicable
254 Blank
NHANES III Examination Data File
------------------------------------------------------------------------
------------------------------------------------------------------------
Positions Item description Source
SAS name Counts and code and notes
------------------------------------------------------------------------
182-190 Vitamin A (RE)
DRPNVARE 14784 000000000-035293.35
846 888888888 Blank but applicable
254 Blank
191-199 Carotenes (RE)
DRPNCARO 14784 000000000-0016691.2
846 888888888 Blank but applicable
254 Blank
200-208 Vitamin E (alpha tocopherol equivalents)
DRPNVE 14784 000000000-000600.94
846 888888888 Blank but applicable
254 Blank
209-217 Ascorbic acid (mg)
DRPNVC 14784 000000000-001427.82
846 888888888 Blank but applicable
254 Blank
218-226 Thiamin (mg)
DRPNVB1 14784 000000000-000024.75
846 888888888 Blank but applicable
254 Blank
227-235 Riboflavin (mg)
DRPNVB2 14784 000000000-000029.18
846 888888888 Blank but applicable
254 Blank
236-244 Niacin (mg)
DRPNIAC 14784 000000000-000000321
846 888888888 Blank but applicable
254 Blank
245-253 Vitamin B6 (mg)
DRPNVB6 14784 000000000-000032.19
846 888888888 Blank but applicable
254 Blank
254-262 Folacin (micrograms)
DRPNFOLA 14784 000000000-006430.72
846 888888888 Blank but applicable
254 Blank
NHANES III Examination Data File
------------------------------------------------------------------------
------------------------------------------------------------------------
Positions Item description Source
SAS name Counts and code and notes
------------------------------------------------------------------------
263-271 Vitamin B12 (micrograms)
DRPNVB12 14784 000000000-000167.64
846 888888888 Blank but applicable
254 Blank
272-280 Calcium (mg)
DRPNCALC 14784 000000000-006878.77
846 888888888 Blank but applicable
254 Blank
281-289 Phosphorus (mg)
DRPNPHOS 14784 000000000-009591.51
846 888888888 Blank but applicable
254 Blank
290-298 Magnesium (mg)
DRPNMAGN 14784 000003.26-0001723.9
846 888888888 Blank but applicable
254 Blank
299-307 Iron (mg)
DRPNIRON 14784 000000000-000286.86
846 888888888 Blank but applicable
254 Blank
308-316 Zinc (mg)
DRPNZINC 14784 000000.11-000748.32
846 888888888 Blank but applicable
254 Blank
317-325 Copper (mg)
DRPNCOPP 14784 000000.01-000037.46
846 888888888 Blank but applicable
254 Blank
326-334 Sodium (mg)
DRPNSODI 14784 000043.86-033433.61
846 888888888 Blank but applicable
254 Blank
335-343 Potassium (mg)
DRPNPOTA 14784 0000007.2-017014.05
846 888888888 Blank but applicable
254 Blank
NHANES III Examination Data File
------------------------------------------------------------------------
------------------------------------------------------------------------
Positions Item description Source
SAS name Counts and code and notes
------------------------------------------------------------------------
344-349 Percent of kilocalories from total fat
DRPNKF (percent kcal)
14784 000000-083.84
846 888888 Blank but applicable
254 Blank
350-355 Percent of kilocalories from saturated
DRPNKSF fat (percent kcal)
14784 000000-0051.5
846 888888 Blank but applicable
254 Blank
356-361 Percent of kilocalories from
DRPNKMF monounsaturated fat (percent kcal)
14784 000000-038.38
846 888888 Blank but applicable
254 Blank
362-367 Percent of kilocalories from
DRPNKPF polyunsaturated fat (percent kcal)
14784 000000-038.87
846 888888 Blank but applicable
254 Blank
368-373 Percent of kilocalories from protein
DRPNKP (percent kcal)
14784 000000-0102.2
846 888888 Blank but applicable
254 Blank
374-379 Percent of kilocalories from
DRPNKC carbohydrate (percent kcal)
14784 000000-000120
846 888888 Blank but applicable
254 Blank
380-385 Percent of kilocalories from alcohol
DRPNKA (percent kcal)
14784 000000-000080
846 888888 Blank but applicable
254 Blank
NHANES III Examination Data File
------------------------------------------------------------------------
Laboratory Component
------------------------------------------------------------------------
Positions Item description Source
SAS name Counts and code and notes
------------------------------------------------------------------------
386-390 Blood lead (ug/dl)
PBP 13176 000.7-071.8
1658 88888 Blank but applicable
1050 Blank
391-394 Blood lead in standard units (SI)(umol/L)
PBPSI 13176 0.03-3.47
1658 8888 Blank but applicable
1050 Blank
395-397 HDL cholesterol (mg/dl)
HDP 11442 012-191
1465 888 Blank but applicable
2977 Blank
398-402 HDL cholesterol in standard units (SI)(mmol/L)
HDPSI 11442 00.31-4.939
1465 88888 Blank but applicable
2977 Blank
403-406 Triglycerides (mg/dl)
TGP 11492 0017-3616
1415 8888 Blank but applicable
2977 Blank
407-412 Triglycerides in standard units (SI)(mmol/L)
TGPSI 11492 00.192-40.825
1415 888888 Blank but applicable
2977 Blank
413-416 Total cholesterol (mg/dl)
TCP 11535 0055-0702
1372 8888 Blank but applicable
2977 Blank
417-422 Total cholesterol in standard units (SI)(mmol/L)
TCPSI 11535 01.422-18.154
1372 888888 Blank but applicable
2977 Blank
Technical Notes: Dietary File
DRPSTAT Status of interview
1 Reliable and complete: The dietary interviewers coded
the quality of the recall at the time of the interview
and provided information for NCHS staff to review. This
code means that the respondent provided reliable and
complete information with respect to reported foods and
beverages consumed during the day prior to the
examination.
2 Reliable, but incomplete: The information provided by
the respondent was reliable, but incomplete, either
because the recall contains a time period for which no
information was given, or the recall contains an
unknown meal, food, or beverage. Total nutrient
intakes for recalls coded incomplete' are not reported
and appear as "8's" in the file.
3 Unreliable: The information provided by the respondent
was deemed to be unreliable. Total nutrient intakes for
recalls coded unreliable' are not reported and appear
as "8's" in the file.
4 Interveiw lost to a computer malfunction: The dietary
interview was completed but the file was subsequently
lost due to a computer malfunction. Total nutrient
intakes for recalls coded lost' are not reported and
appear as "8's" in the file.
5 Breast-feeding infant or child: The recall included
human milk. The actual volume of milk consumed was not
quantified; the number of minutes per feeding session
was recorded. It was not possible to calculate total
nutrient intakes for breast-fed children, therefore,
total energy and nutrient intakes for these examinees
are not reported and appear as "8's" in the file.
DRPRESP Respondent Code
If the Sample Person was under 12 years of age, the
first choice for a respondent was the person who was
primarily responsible for preparing meals for the
child. In the case of children 6-11 years, the child
and a proxy often participated in the interview.
Interviews completed with the Sample Person and a proxy
respondent were coded as Sample Person/Proxy.
1 Sample Person: The Sample Person (Examinee) completed
the interview without assistance from another person.
This includes situations when a translator was used
during the interview to translate information provided
solely by the respondent.
2 Proxy: Someone else who answered on behalf of the
Sample Person. This includes parents, guardians,
siblings over 11 years old, caretakers, baby-sitters,
and persons responsible for planning or preparing foods
eaten by the Sample Person.
3 Sample Person/Proxy: The Sample Person and proxy both
contributed information during the interview.
DRPRDAY Recall Day
DRPRDAY corresponds to the day of thw week for the 24-hour period
(midnight to midnight) in which the Sample
Person consumed the foods and beverages listed in their
24-hour recall. This is the day prior to their
examination.
DRPNKC Percent of kilocalories from carbohydrate
Total carbohydrates include sugars and complex
carbohydrates. Carbohydrate values for foods were
derived by difference which may overestimate the
carbohydrate content of the food and the percentage of
food energy derived from carbohydrate.
DRPQ2A Quantity of plain drinking water
The quantity of plain drinking water was reported
either in total fluid ounces per day or by specifying
the number of glasses of water and the volume per glass
using household glasses. All responses were converted
to fluid ounces. If the respondent answered 'none',
meaning that no plain drinking water is usually
consumed, the quantity was reported as xxx.xx fluid
ounces. The volume of plain drinking water is in
addition to water used in prepared foods and
reconstituted beverages reported in the 24-hr recall.
DRPQ5-DRPQ11 Food sufficiency questions
Similar questions about food sufficiency were also
asked of a family respondent in the Family
Questionnaire (see HFF4-8). It is recommended that the
food sufficiency questions from the Dietary Recall
(DRPQ5 - DRPQ11) be analyzed independently from the
food sufficiency questions from the Family
Questionnaire (HFF4-8).
