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Can adverse effects of dietary fat intake be overestimated as a consequence of dietary fat underreporting?

Artikel i vetenskaplig tidskrift
Författare Berit L Heitmann
Lauren Lissner
Publicerad i Public Health Nutrition
Volym 8
Sidor 1332-1337
Publiceringsår 2005
Publicerad vid Institutionen för samhällsmedicin, Avdelningen för allmänmedicin
Sidor 1332-1337
Språk en
Länkar journals.cambridge.org/action/displ...
Ämnesord Fat intake; Obesity; Bias; Epidemiology
Ämneskategorier Folkhälsomedicinska forskningsområden

Sammanfattning

Research Unit for Dietary Studies and Danish Epidemiology Science Centre, Institute of Preventive Medicine, Copenhagen University Hospital, DK-1399 Copenhagen K, Denmark. blh@ipm.hosp.dk OBJECTIVE: To describe the consequences of systematic reporting bias by the obese for diet-disease relationships. DESIGN: The present report used 24-hour urinary nitrogen and estimates of 24-hour energy expenditure to assess error in diet reporting, and examined the consequence of accounting for this error for associations between dietary fat intake and serum low-density lipoprotein (LDL)-cholesterol. SETTING: Sub-study to the Danish MONICA (Monitoring Trends and Determinants in Cardiovascular Disease) project, carried out in 1987-1988. SUBJECTS: A random sub-sample of the adult Danish male population (n = 152). RESULTS: Correcting dietary fat for underreporting error weakened, rather than strengthened, the association between dietary fat intake and LDL-cholesterol by reducing the slope of the regression from beta = 3.4, P = 0.02 to beta = 2.7, P = 0.04. CONCLUSION: This example illustrates that systematic underreporting of dietary fat by high-risk groups such as the obese may produce an overestimated association. These results imply that previous epidemiological studies showing a positive association between percentage of energy from fat and other health outcomes, e.g. cancer and heart disease, may have overestimated the negative effects of a high-fat diet. If we were able to correctly assess dietary fat intake in general populations, recommendations for fat intake may be more liberal than the 30% suggested today. Improved assessment of fat intake in epidemiological studies is necessary for future development of evidence-based recommendations for diet and health . PMID: 16372929 [PubMed - indexed for MEDLINE]

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