• Component Description
• Eligible Sample
• Interview Setting and Mode of Administration
• Data Processing and Editing
• Analytic Notes
• Codebook
  • SEQN - Respondent sequence number
  • ECQ020 - Mother smoked when pregnant
  • ECD070A - Weight at birth, pounds
  • ECD070B - Weight at birth, ounces
  • WHQ030E - How do you consider your child's weight
  • MCQ080E - Your child was overweight
  • ECQ150 - Help your child control weight

National Health and Nutrition Examination Survey and National Youth Fitness Survey

2012-2012 Data Documentation, Codebook, and Frequencies

NHANES/NNYFS Combined Sample 2012 - Early Childhood (C_ECQ)

RDC Only Data File: C_ECQ.xpt

First Published: September 2013

Last Revised: NA

Due to disclosure issues, this dataset is not available publicly. Access may be obtained through the NCHS Research Data Center (https://www.cdc.gov/rdc).

Component Description

The early childhood questionnaire (variable name prefix ECQ) includes smoking habits of the mother while she was pregnant with the participant, birth weight, and the proxy’s assessment of the participant’s current weight. These questions were asked in the National Youth Fitness Survey (NYFS) and in the second year of the 2011-2012 National Health and Nutritional Examination Survey (NHANES).

Eligible Sample

All survey participants were eligible. Proxy respondents answered the questions for participants aged 3 to 15 years.

Interview Setting and Mode of Administration

These questions were asked, in the home, by trained interviewers using the Computer-Assisted Personal Interviewing (CAPI) system.

For details on the administration of the combined NYFS and NHANES Early Childhood (C_ECQ) section, please refer to Interviewer Procedures Manual and the Early Childhood Sample Person Participant Questionnaire on the NHANES website.

Data Processing and Editing

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.

For details on the quality control/quality assurance process for this component, please refer to the Interviewer Procedures Manual.

 

For ECD070A (weight at birth, pounds) and ECD070B (weight at birth, ounces), all responses of 13 pounds or over were collapsed into a single category, with ECD070A coded as “13” and ECD070B coded as “0.” This was done to protect the confidentiality of survey participants.

Analytic Notes

The analysis of combined NYFS and NHANES early childhood questionnaire data must be conducted using the appropriate survey design variables, sample weights, and the basic demographic variables. Although this data was collected as the part of the household questionnaire, if it is merged with the exam data, exam sample weights should be used for the analyses.

Please refer to the Analytic Guidelines https://www.cdc.gov/nchs/nnyfs/index.htm for further details on the use of sample weights and other analytic issues.

Codebook and Frequencies