The following IDATA DHQ II dataset(s) are available for delivery on CDAS. For each dataset, a Data Dictionary that describes the data is publicly available. In order to obtain the actual data in SAS or CSV format, you must begin a data-only request. Data will be delivered once the project is approved and data transfer agreements are completed.

To learn more about the DHQ II data collected as part of the study, visit the IDATA DHQ II documentation page.

Datasets and Data Dictionaries

Files	Description
Data Dictionary (PDF - 470.9 KB)	1. The DHQ II Admin 1 Food Frequencies dataset (140,745 records for 916 participants) contains one record per food associated with the first administration of the DHQ.
Data Dictionary (PDF - 470.8 KB)	2. The DHQ II Admin 2 Food Frequencies dataset (104,218 records for 801 participants) contains one record per food associated with the second administration of the DHQ.
Data Dictionary (PDF - 538.4 KB)	3. The DHQ II Nutrient File dataset (1,082 records for 1,082 participants) contains one record per person with an array of the two administrations.
Data Dictionary (PDF - 766.2 KB)	4. The DHQ II Raw Questionnaire dataset (1,718 records for 1,007 participants) contains one record per person per administration.
Data Dictionary (PDF - 183.7 KB)	5. The DHQ II Accounting dataset (1,082 records for 1,082 participants) contains one record per participant and provides a summary of who has DHQ data.