• Component Description
• Eligible Sample
• Interview Setting and Mode of Administration
• Quality Assurance & Quality Control
• Data Processing and Editing
• Analytic Notes
• Codebook
  • SEQN - Respondent sequence number
  • DBQ010 - Ever breastfed or fed breastmilk
  • DBD020 - Age started eating other foods(days)
  • DBD030 - Age stopped breastfeeding(days)
  • DBD040 - Age first fed formula daily(days)
  • DBD050 - Age stopped receiving formula(days)
  • DBD060 - Age first fed milk daily basis(days)
  • DBD072A - Type of milk first fed-whole milk
  • DBD072B - Type of milk first fed-2% milk
  • DBD072C - Type of milk first fed-1% milk
  • DBD072D - Type of milk first fed-fat free milk
  • DBD072U - Type of milk first fed - other
  • DBD080 - Age started eating solid foods(days)
  • DBD085 - CHECK ITEM
  • DBQ700 - How healthy is the diet
  • DBQ197 - Past 30 day milk product consumption
  • DBD222A - You drink whole or regular milk
  • DBD222B - You drink 2% fat milk
  • DBD222C - You drink 1% fat milk
  • DBD222D - You drink fat-free or skim milk
  • DBD222U - You drink another type of milk
  • DBD225 - CHECK ITEM
  • DBQ229 - Regular milk use 5 times per week
  • DBQ235A - How often drank milk age 5-12
  • DBQ235B - How often drank milk age 13-17
  • DBQ235C - How often drank milk age 18-35
  • DBD265a - CHECK ITEM
  • DBQ301 - Community/Government meals delivered
  • DBQ330 - Eat meals at Community/Senior center
  • DBD355 - CHECK ITEM
  • DBQ360 - Attend kindergarten thru high school
  • DBQ370 - School serves school lunches
  • DBD381 - # of times/week get school lunch
  • DBQ390 - School lunch free, reduced or full price
  • DBQ400 - School serve complete breakfast each day
  • DBD411 - # of times/week get school breakfast
  • DBQ421 - School breakfast free/reduced/full price
  • DBQ422 - CHECK ITEM
  • DBQ424 - Summer program meal free/reduced price
  • DBD709 - CHECK ITEM
  • DBD091 - # of times/wk eat meals not from a home
  • DBQ719 - CHECK ITEM
  • DBQ720 - Heard of dietary guidelines?
  • DBQ730 - Heard of food guide pyramid?
  • DBQ740 - Heard about 5-a-day program?
  • DBQ750 - Use nutrition facts panel on food label
  • DBQ760 - Use ingredients list on food label
  • DBQ770 - Use serving size info on food label
  • DBQ780 - Use health claims on food packages
  • DBQ789 - CHECK ITEM
  • DBQ790 - Check calories on food label
  • DBQ800 - Check calories from fat on food label
  • DBQ810 - Check total fat on food label
  • DBQ820 - Check trans fat on food label
  • DBQ830 - Check saturated fat on food label
  • DBQ840 - Check cholesterol on food label
  • DBQ850 - Check sodium on food label
  • DBQ860 - Check carbohydrates on food label
  • DBQ870 - Check fiber on food label
  • DBQ880 - Check sugars on food label
  • DBQ890 - Are people born to be fat/thin

National Health and Nutrition Examination Survey

2005-2006 Data Documentation, Codebook, and Frequencies

Diet Behavior & Nutrition (DBQ_D)

Data File: DBQ_D.xpt

First Published: November 2007

Last Revised: NA

Component Description

The Diet Behavior and Nutrition (variable name prefix DBQ) section provides personal interview data on various dietary behavior and nutrition related topics. Many of the questions were included in NHANES II (1976-80), Hispanic HANES (1982-84), NHANES III (1988-94), and NHANES 1999-2002 and 2003-2004. Topics included in the section are:

• Breastfeeding and other childhood feeding practices (≤ 6 yr)
• Current milk consumption pattern and types of milk (≥ 1 yr)
• Milk consumption pattern throughout the life span (≥ 20 yr)
• Community or government meal program participation (≥ 60 yr)
• School meal program participation (4-19 yr)
• Self-appraised healthfulness level of one’s own diet (≥ 16 yr)
• Frequency of eating meals not prepared at a home (≥ 1 yr)
• Awareness of federal nutrition information programs (≥ 16 yr)
• Use of food labels (≥ 16 yr)
• Opinion on “gene theory” regarding one’s body weight (≥ 16 yr)

Eligible Sample

The target age groups for questions in this section vary by the topic. For example, the questions pertaining to infant nutrition and breast-feeding were asked of proxy respondents for children 6 years of age and younger; and senior meal program participation questions were asked of respondents 60 years of age and older. Please review the questionnaire and codebook carefully. Frequency counts were verified during the preparation of the file.

Interview Setting and Mode of Administration

A question on the weekly frequency of eating meals not prepared at a home (DBD091) was asked during the physical examination, at the mobile examination center (MEC), of participants 12-15 years old. Theses 12-15 years old participants answered questions for themselves.

The same question was asked, before the physical examination, in the home, of participants 1-11 years and of participants 16 years and older.

All other questions in this section were asked before the physical examination, in the home, as well.
In the home, questions were asked by trained interviews using the Computer-Assisted Personal Interviewing (CAPI) system. Hand cards showing response categories were also used for some questions. When necessary, the interviewers read the hand cards to respondents. Persons 16 years of age and older and emancipated minors were interviewed directly. A proxy provided information for survey participants who were under 16 years of age and for individuals who could not answer the questions themselves.

Quality Assurance & Quality Control

The CAPI system is programmed with built-in consistency checks to reduce data entry errors. CAPI also uses online help screens to assist interviewers in defining key terms used in the questionnaire. All of the data was reviewed by the NHANES field office staff for accuracy and completeness.

Data Processing and Editing

Frequency counts were checked, “skip” patterns were verified, and the reasonableness of question responses was reviewed. Edits were made to some variables to ensure the completeness, consistency, and analytic usefulness of the data. Edits were also made, when necessary, to address data disclosure concerns. When a variable was modified globally, as part of the editing process, the third letter in the variable name was changed from a Q (i.e. DIQ) to a D (i.e. DID). For example, some data were collected using two variables (a number variable and a unit of measure variable), but combined into a single variable for data release purposes.

DBD020, DBD030, DBD040, DBD050, DBD060, and DBD080 (Breastfeeding and other childhood feeding practices)

This information was collected using two-part (number and unit) questions to allow respondents to report the age of interest in days, weeks, months, or years. The released variables were edited to standardize the reported age to number of days, using the following conversion factors: 7 days/week, 30.4 days/month and 365 days/year.

DBD091 (Weekly frequency of eating meals not prepared at a home)
Respondents were asked how many times per week they had eaten meals that were not prepared at a home. If the frequency was reported as "never," the value was recoded as zero. If the frequency was reported more than 21 times per week, the value was recoded as “5555.” If the frequency was reported as "less than weekly," the value was recoded as “6666.”

Analytic Notes

DBQ072A, DBQ072B, DBQ072C, DBQ072D, and DBQ072U (Type of milk first fed)

The response categories used for reporting types of milk were modified in 2005 to accommodate the most updated FDA regulations. The table below describes these changes in comparison with the categories used in the data released in the 2003-2004 cycle.

Comparision of 2004-2004 and 2005-2006 DBQ Type of Milk First Fed Response Categories

2003-2004 DBQ Variable Names	2003-2004 DBW Code Description	2005-2006 DBQ Variable Names	2005-2006 DBQ Code Description
DBQ071a	Whole or regular milk	DBD072a	Whole or regular milk
DBQ071b	2% fat milk (includes “low fat milk” not further specified)	DBD072b	2% fat or reduced fat milk
DBQ071c	1% fat milk	DBD072c	1% fat or low-fat milk (includes 0.5% fat milk or “low-fat milk” not further specified)
DBQ071d	Skim, nonfat, or 0.5% fat milk	DBD072d	Fat-free, skim or nonfat milk
DBQ071u	Another type	DBD072u	Another type

Responses to these questions were collected as “code all that apply”. A respondent could report more than one type of milk and all their responses were recorded.

DBQ221A, DBQ221B, DBQ221C, DBQ221D, and DBQ221U (Type of milk used)

The response categories used for reporting types of milk were modified in 2005 to accommodate the most updated FDA regulations. The table below describes these changes in comparison with the categories used in the data released in the 2003-2004 cycle.

Comparision of 2003-2004 and 2005-2006 DBQ Type of Milk Used Response Categories

2003-2004 DBQ Variable Names	2003-2004 DBQ Code Description	2005-2006 DBQ Variable Names	2005-2006 DBQ Code Description
DBQ221a	Whole or regular milk	DBD222a	Whole or regular milk
DBQ221b	2% fat milk (includes “low fat milk” not further specified)	DBD222b	2% fat or reduced fat milk
DBQ221c	1% fat milk	DBD222c	1% fat or low-fat milk (includes 0.5% fat milk or “low-fat milk” not further specified)
DBQ221d	Skim, nonfat, or 0.5% fat milk	DBD222d	Fat-free, skim or nonfat milk
DBQ221u	Another type	DBD222u	Another type

Responses to these questions are collected as “code all that apply”. A respondent could report more than one type of milk and all their responses were recorded.

DBD091 (Weekly frequency of eating meals not prepared at a home)

A similar question was included in the NHANES 2003-2004 release (variable name: DBD090) for participants aged 1-11 and 16+ years. This current version includes updated probes for different eating establishments, to be more inclusive about the places that provide commercially prepared foods. In addition, a probing sentence was added at the introductory paragraph to help respondents remember to include all meals. Only foods consumed as “meals” are of interest, foods consumed as “snacks” are not included in this question. Meals received as part of the school lunch or breakfast program, “Meals on Wheels” program, or prepared at a community center or senior center are not included either.
Since the question DBD091 was asked as part of household interview for participants 1-11 (proxy interview used) and 16 or more years of age, the interview sample weights may be used in their analysis. However, if the data is joined with other data from the MEC, the MEC sample weights should be used. Analysis of the question, DBD091, for 12 to 15 year olds should use the MEC sample weights because the question was asked in the MEC for this age group.

Please refer to the Analytic Guidelines for further details on the use of sample weights and other analytic issues. The Analytic Guidelines are available on the NHANES website.

Codebook and Frequencies