Validation of Dietary Calcium Questionnaires Using Diet Records

NCT00512733 | Completed

• 1 other identifier: H9291-26992
• Study Type: observational
• Target: 160
• Locations: 1 country
• Sites: 1

Brief Summary

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.

Conditions

Healthy

Keywords

Healthy volunteers

Outcome Measures

Primary Outcomes (1)

• Mean calcium intake

  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.

  3 days

Eligibility Criteria

• Age: 19 Years+
• Sex: female
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

Adults

You may qualify if:

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

You may not qualify if:

• Inability to keep a diet record
• Active gastrointestinal disease that limits or restricts diet
• Inability to understand and provide informed consent.

Sponsors & Collaborators

• University of California, San Francisco: lead
• Dairy Council of California: collaborator

Study Sites (1)

University of California San Francisco

San Francisco, California, 94115, United States

Location

Study Officials

• Deborah Sellmeyer, MD

  University of California, San Francisco

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: observational
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: August 7, 2007
• First Posted: August 8, 2007
• Study Start: March 1, 2006
• Primary Completion: March 1, 2008
• Study Completion: March 1, 2008
• Last Updated: August 11, 2014

Record last verified: 2014-08

Locations

US (1)