A. Black|Ailsa Welch|Sheila Bingham
Validation of dietary intakes measured by diet history against24 h urinary nitrogen excretion and energy expenditure measuredby the doubly-labelled water method in middle-aged women
diet history method estimating energy n intakes validated 24 h urinary n excretion energy expenditure measured doublylabelled water dlw method fortyeight women aged 5065 years studied 1 year weighed diet records 4 two 24 h urine collections measurement urinary n excretion obtained four seasons end year diet history obtained bmr measured wholebody calorimetry sixteen women total energy expenditure ee measured dlw energy intake ei n intake ni calculated using food tables using weighed records diet history respectively mean ni 1121 sd 209 g 1147 sd 240 g ns ei 808 sd 154 mj 820 sd 186 mj ns mean urine nni eibmr values indicated bias underreporting weighed record diet history techniques individuals significant difference measures group level pearson correlation coefficient r urine n v ni 081 weighed record 038 diet history correlation ee v ei r 048 weighed record r 011 diet history study diet history gave estimate mean intake weighed record appeared perform better ranking individuals