Leena Sevak|Punam Mangtani|Valerie McCormack|D. Bhakta|Tashmin Kassam?Khamis|Isabel dos Santos Silva
Validation of a food frequency questionnaire to assess macro- and micro-nutrient intake among South Asians in the United Kingdom
University of London|London School of Hygiene & Tropical Medicine|University of London|London School of Hygiene & Tropical Medicine|University of London|London School of Hygiene & Tropical Medicine|University of London|London School of Hygiene & Tropical Medicine|Aga Khan University|University of London|London School of Hygiene & Tropical Medicine
south asian population one largest minority ethnic groups united kingdom uk forming 27 uk population risk diseases chd niddm high south asians risk cancer low population compared native uk population migrant groups useful investigate experience disease dietary exposures aetiological clues south asians ffq designed populationbased casecontrol study diet breast cancerto validate food frequency questionnaire ffq assess macro micronutrient intake among south asians united kingdom uka oneyear long study current diet conducted using monthly telephone 24hour recalls followed administration intervieweradministered ffq ascertain usual diet period general practices thames west midlands regions england used sequentially recruit 100 women larger random sample south asian migrants general practitioners patient lists participating controls casecontrol study diet breast cancera total 133 women invited achieve final sample 100 76 response rate proportion individuals classified two dietary assessment methods adjacent quartiles high ranging 65 vitamin 96 protein misclassification opposite quartiles low 0 5 except vitamin 10 energyadjusted spearman correlation coefficients reasonable almost nutrients highest protein 076 nsp 071 folate 070 cholesterol 069 correction withinperson variation monthly 24hour recalls little effect magnitude nutrient correlations ffq 24hour recalls calibration coefficients correct relative risks nutrientdisease associations 050 nutrients indicating degree attenuation introduced ffq would acceptablethis ffq specifically designed south asian women uk despite diversity diets ffq reasonable validity role diet breast cancer disease aetiology population assessed instrument