Document Detail

Diagnosis, symptoms, and calcium intakes of individuals with self-reported lactose intolerance.
MedLine Citation:
PMID:  15670985     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To determine methods of diagnosis, symptoms, and calcium intake from food and supplements for individuals with self-reported lactose intolerance. METHODS/DESIGN: Cross-sectional survey using a mailed questionnaire. SUBJECTS/SETTING: A convenience sample of 189 adults with self-reported lactose intolerance living in the metropolitan area of Vancouver Canada responded to posters or advertisements, and 159 returned completed questionnaires. MEASURES OF OUTCOME: Methods of diagnosis, symptoms experienced and their severity were self-reported. Estimated calcium intake from food and supplements was assessed using a food frequency questionnaire. Data were analyzed using descriptive statistics, chi-square, Pearson correlation analysis, t-tests and Analysis of Variance. RESULTS: Participants were 47 +/- 15 years of age; 72% female and 28% male; 67% Caucasian; and 54% had self-diagnosed their lactose intolerance. Of the 42% diagnosed by a physician, only 10% had been diagnosed by valid tests. Mean estimated food calcium intake was 591 +/- 382 mg/d and did not differ between those who were self- or physician-diagnosed. Only 11.5% of participants met their age-appropriate Adequate Intake (AI) from food calcium sources alone. Calcium supplements were used by 65% and provided an average of 746 +/- 703 mg calcium/day to those who used them; mean intakes of this group met the AI. CONCLUSIONS: Calcium intake from food sources alone is inadequate to meet the AI in individuals with self-reported lactose intolerance. Physicians managing lactose intolerance need current information on how the AI can be met through appropriate food choices and possible supplementation.
Heather Y Lovelace; Susan I Barr
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of the American College of Nutrition     Volume:  24     ISSN:  0731-5724     ISO Abbreviation:  J Am Coll Nutr     Publication Date:  2005 Feb 
Date Detail:
Created Date:  2005-01-26     Completed Date:  2005-05-05     Revised Date:  2008-06-23    
Medline Journal Info:
Nlm Unique ID:  8215879     Medline TA:  J Am Coll Nutr     Country:  United States    
Other Details:
Languages:  eng     Pagination:  51-7     Citation Subset:  IM    
University of British Columbia, 2205 East Mall, Vancouver, B.C., CANADA V6T 1Z4.
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MeSH Terms
Aged, 80 and over
Calcium, Dietary / administration & dosage*
Cross-Sectional Studies
Dairy Products / adverse effects*
Dietary Supplements
Lactose Intolerance / diagnosis,  physiopathology*
Middle Aged
Nutritional Requirements*
Self Disclosure
Severity of Illness Index
Reg. No./Substance:
0/Calcium, Dietary

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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