Validation of Dietary Calcium Questionnaires Using Diet Records

This study has been completed.
Sponsor:
Collaborator:
Dairy Council of California
Information provided by (Responsible Party):
University of California, San Francisco
ClinicalTrials.gov Identifier:
NCT00512733
First received: August 7, 2007
Last updated: August 8, 2014
Last verified: August 2014
  Purpose

Dairy products continue to be an important source of calcium, providing over half the calcium intake for most individuals. Educational interventions promoting adequate calcium intake with tools estimating dietary calcium that can be easily utilized by consumers would be a valuable asset to promoting skeletal health. Validation of these tools against standard dietary assessment methods enhances their utility. The Dairy Council of California has developed two dietary calcium questionnaires, one electronic and one in print, using known dietary sources of calcium including frequency of consumption and portion size. For these questionnaires to be effective in clinical and research settings they must be a valid measurement of dietary calcium intake. To measure the validity of the dietary calcium questionnaires one hundred seventy three women will complete the two dietary calcium questionnaires and one 3-day food record. The dietary calcium questionnaires will be validated against this established method of dietary intake measurement. The objective of this study is to validate two dietary calcium questionnaires that can be used in clinical and research settings against an established method of dietary intake measurement. It is hypothesized that both dietary calcium questionnaires will be a valid measurement of dietary calcium intake in women.


Condition
Healthy

Study Type: Observational
Study Design: Time Perspective: Prospective
Official Title: Validation of Dietary Calcium Questionnaires Using Diet Records

Resource links provided by NLM:


Further study details as provided by University of California, San Francisco:

Primary Outcome Measures:
  • Mean calcium intake [ Time Frame: 3 days ] [ Designated as safety issue: No ]

    Participants' 3-day food records were mailed to the study and examined for completeness and legibility. Missing or unclear items were corrected by telephoning the participant. Food records were entered into Food Processor Plus software (ESHA Research, Salem, OR) to determine nutrient content. For food items that were not in the software's database, nutrient content was determined by examination of labels, contact with food manufacturers, search of the US Department of Agriculture nutrient database, or estimation from ingredient content by an RD.

    At the initial study visit, participants completed a written questionnaire and the online questionnaire. Calcium intake was calculated using a built-in calculator in the online questionnaire and by hand using the instructions in the booklet for the written questionnaire.



Enrollment: 160
Study Start Date: March 2006
Study Completion Date: March 2008
Primary Completion Date: March 2008 (Final data collection date for primary outcome measure)
Detailed Description:

The Dairy Council of California has developed two dietary calcium questionnaires, one electronic and one in print, using known dietary sources of calcium including frequency of consumption and portion size. For these questionnaires to be effective in clinical and research settings they must be a valid measurement of dietary calcium intake. To measure the validity of the dietary calcium questionnaires one hundred seventy three women will complete the two dietary calcium questionnaires and one 3-day food record. The dietary calcium questionnaires will be validated against this established method of dietary intake measurement. The objective of this study is to validate two dietary calcium questionnaires that can be used in clinical and research settings against an established method of dietary intake measurement.

  Eligibility

Ages Eligible for Study:   19 Years and older
Genders Eligible for Study:   Female
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population

Adults

Criteria

Inclusion Criteria:

  • Independently living women over the age of 19 in generally good health.

Exclusion Criteria:

  • Inability to keep a diet record
  • Active gastrointestinal disease that limits or restricts diet
  • Inability to understand and provide informed consent.
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00512733

Locations
United States, California
University of California San Francisco
San Francisco, California, United States, 94115
Sponsors and Collaborators
University of California, San Francisco
Dairy Council of California
Investigators
Principal Investigator: Deborah Sellmeyer, MD University of California, San Francisco
  More Information

No publications provided

Responsible Party: University of California, San Francisco
ClinicalTrials.gov Identifier: NCT00512733     History of Changes
Other Study ID Numbers: H9291-26992
Study First Received: August 7, 2007
Last Updated: August 8, 2014
Health Authority: United States: Institutional Review Board

Keywords provided by University of California, San Francisco:
Healthy volunteers

Additional relevant MeSH terms:
Calcium, Dietary
Bone Density Conservation Agents
Physiological Effects of Drugs
Pharmacologic Actions

ClinicalTrials.gov processed this record on October 19, 2014