Characteristics of women who frequently under report their energy intake: a doubly labelled water study

Abstract

Background/Objectives: We applied three dietary assessment methods and aimed at obtaining a set of physical, social and psychological variables that can discriminate those individuals who did not underreport ('never under-reporters'), those who underreported in one dietary assessment method ('occasional under-reporters') and those who underreported in two or three dietary assessment methods ('frequent under-reporters'). Participants/Methods: Sixty-five women aged 18-57 years were recruited for this study. Total energy expenditure was determined by doubly labelled water, and energy intake was estimated by three 24-h diet recalls, 3-day food records and a food frequency questionnaire. A multiple discriminant analysis was used to identify which of those variables better discriminated the three groups: body mass index (BMI), income, education, social desirability, nutritional knowledge, dietary restraint, physical activity practice, body dissatisfaction and binge-eating symptoms. Results: Twenty-three participants were 'never under-reporters'. Twenty-four participants were 'occasional under-reporters' and 18 were 'frequent under-reporters'. Four variables entered the discriminant model: income, BMI, social desirability and body dissatisfaction. According to potency indices, income contributed the most to the total discriminant power, followed in decreasing order by social desirability score, BMI and body dissatisfaction. Income, social desirability and BMI were the characteristics that mainly separated the 'never under-reporters' from the under-reporters (occasional or frequent). Body dissatisfaction better discriminated the 'occasional under-reporters' from the 'frequent under-reporters'. Conclusions: 'Frequent under-reporters' have a greater BMI, social desirability score, body dissatisfaction score and lower income. These four variables seemed to be able to discriminate individuals who are more prone to systematic under reporting.

Fibre intake in relation to serum total cholesterol levels and CHD risk: a comparison of dietary assessment methods

“…Doubly labelled water studies indicate that women are more prone to under-reporting energy than men (Hebert et al, 1995(Hebert et al, , 1997. There is also evidence that energy reporting accuracy among women varies according to social desirability, adiposity and education level (Hebert et al, 1995(Hebert et al, , 1997(Hebert et al, , 2001Scagliusi et al, 2009). Therefore, the lack of evidence for significant differences between associations estimated using the FFQ and 7DD among women in this study may reflect a consistency of reporting error that extends across both instruments.…”

Serum and red-blood-cell folate demonstrate differential associations with BMI in pregnant women

“…We did not conduct dietary surveys on participants. Previous studies reported that obese women tended to under-report their food intake (17,18) , and folate from naturally occurring food sources exhibits variable and incomplete bioavailability, which can be affected by physiological conditions, pharmaceuticals and genetic polymorphisms (19)(20)(21) . Third, BMI was measured in early pregnancy (95 % were measured before 15 weeks) and this may lead to misclassification of obesity, although the weight gain in early second trimester is generally small (22) .…”

Sub-relato da ingestão energética e fatores associados em estudo de base populacional

“…Várias características têm sido associadas ao sub-relato em diversos trabalhos, dentre as quais se destacam: sexo, idade, condições socioeconô-micas e índice de massa corporal (IMC) 6,7,8,9,10 .…”