The Diabetes section (prefix DIQ) provides personal interview data on diabetes, use of medications, and symptoms associated with diabetes such as vision problems, foot ulcers and sensations in the extremities.
All participants 1 year of age and older are eligible for the lead-in question
pertaining to history of diabetes.
- age when first told about diabetes health condition,
- current insulin use (asked regardless of diabetes response),
- duration of insulin use,
- use of oral hypoglycemic agents,
- history of retinopathy and vision troubles due to diabetes (asked of ages 20+ years),
- foot ulcer conditions that required significant time to heal (asked of ages 40+ years regardless of diabetes response),
- numbness in hands or feet (asked of age 40+ years regardless of diabetes response),
- painful sensations in hands or feet, and leg pain while walking, including pain in the calves (asked of 40+ years regardless of diabetes response)
Interview Setting and Mode of Administration
The DIQ section is administered in the home by a trained household interviewer. This information may be linked to data obtained during the health examination component. An assessment of lower extremity disease (LED) and peripheral neuropathy is performed in adults 40+ years of age. Please refer to the notes for the LED component.
Quality Assurance & Quality Control
Questionnaire data is systematically reviewed for logical, processing, and data input errors on a periodic basis during the process of data collection.
The computer CAPI system had built-in consistency checks, online information screens that provided the interviewers with information about the terms used in the questionnaires, and hard and soft edit checks to reduce the number of keying entry errors. All of the interviews were reviewed by the NHANES field office staff for accuracy and completeness.
For the following derived variables, when “don’t know” was entered as the response to a quantity question, the data were back coded to reflect “don’t know” in the gate question (enter number, less than 1, refused, don’t know) and the “don’t know” response was changed to missing in the quantity variable.
DID040G / DID040Q
DID060G / DID060Q
Only records for eligible participants are included in this file.
Please refer to the Analytic Guidelines for further details on the use of sample weights and other analytic issues at http://www.cdc.gov/nchs/data/nhanes/nhanes_general_guidelines.pdf.