Validation of Dietary Calcium Questionnaires Using Diet Records

Study Overview
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Brief Summary
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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.

Detailed Description
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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.

Official Title
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Validation of Dietary Calcium Questionnaires Using Diet Records

Conditions
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Healthy

Participation Criteria
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Eligibility Criteria
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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.

Ages Eligible for Study
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Minimum Age: 19 Years

Sexes Eligible for Study
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Female

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| 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 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Healthy volunteers