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NCT00339677 · ClinicalTrials.gov registry record
Recontacting Participants in the Observing Protein and Energy Nutrition (OPEN) Study: Re-OPEN
A clinical trial, sponsored by National Cancer Institute (NCI).
- Completed
- Registry status
- 384
- Enrollment target
NCT00339677: Completed study, sponsored by National Cancer Institute (NCI).
NCT00339677 is a clinical trial that has completed, run by National Cancer Institute (NCI). The registered enrollment target is 384 participants. According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT00339677 has completed, sponsored by National Cancer Institute (NCI).
- COMPLETED
- Registry status
- 384 participants
- Enrollment target
Study Summary
This study will evaluate the structure of error in self-reporting instruments on diet, in following up the Observing Protein and Energy Nutrition Study (OPEN) conducted in 1999 and 2000. The OPEN study, the largest of its kind, resulted in a wealth of nutritional biomarker data-measurable indicators of changes in organisms at the level of molecules or cells. A biomarker could help in understanding how environment and disease are related and about disease risks. Furthermore, its findings showed that the relative estimates of disease risk may be weakened by a food frequency questionnaire and a 24-hour questionnaire. Scientists have long recognized that self-reported information from questionnaires and interviews contains errors, but there has been uncertainty about the structure of such errors. For the proposed study, a food record and a food checklist-adjusted food frequency questionnaire will be compared with the previously used questionnaires, to determine whether the newer study instruments present less chance of measurement error. The results may provide better tools for a study on nutritional epidemiology, that is, the incidence and other aspects of disease and nutrition. OPEN study participants will be invited for follow-up. Patients who completed the 1999-2000 study who are not currently pregnant or a liquid weight loss diet may be eligible for this study. The original study recruited men and women 40 to 69 years of age. A letter with summary results from the original OPEN study will be sent to each of the 482 participants. Both the Food Record and the food checklist, called the Daily Food List, are instruments to be given. The Food Record asks the participant to record all foods and beverages consumed. The Daily Food List asks respondents to write in to the number of times a limited number of food categories are consumed. In addition, respondents will be asked to complete the National Cancer Institute Diet History Questionnaire (DHQ), identical to the one t
Primary Outcome
Measurement error in the reporting of dietary intakes
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 384 participants |
| Start Date | 2003-11-06 |
| Est. Completion | 2020-02-24 |
What the finished NCT00339677 record still lists
NCT00339677 is an observational study that tracks outcomes without assigning an intervention. The registered 384 participants enrollment target is mid-sized for trials with a published cap.
The record links to 0 conditions, and to 0 interventions.
NCT00339677 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT00339677 about?
NCT00339677 is a clinical study titled "Recontacting Participants in the Observing Protein and Energy Nutrition (OPEN) Study: Re-OPEN". This study will evaluate the structure of error in self-reporting instruments on diet, in following up the Observing Protein and Energy Nutrition Study (OPEN) conducted in 1999 and 2000. The OPEN study, the largest of its kind, resulted in a wealth of nutritional biomarker data-measurable indicators...
What is the current status of trial NCT00339677?
This trial is currently completed. The enrollment target is 384 participants. The study started on 2003-11-06. Estimated completion is 2020-02-24.
Who is sponsoring clinical trial NCT00339677?
This trial is sponsored by National Cancer Institute (NCI), which has 3,257 total clinical trials registered on ClinicalTrials.gov.
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