TY - JOUR
T1 - Past and current body size affect validity of reported energy intake among middle-aged Danish men
AU - Nielsen, Birgit Marie
AU - Nielsen, Marie M
AU - Toubro, Søren
AU - Pedersen, Oluf
AU - Astrup, Arne
AU - Sørensen, Thorkild I A
AU - Jess, Tine
AU - Heitmann, Berit L
PY - 2009/12
Y1 - 2009/12
N2 - Our objectives were to estimate the degree of misreporting energy intake (EI) and analyze associations with previous BMI, current BMI, or both. The study was part of the Adiposity and Genetics Study follow-up study including 309 Danish men (age 40-65 y) originally sampled from the obligatory draft board examination. Height and weight were measured at the mean ages of 20 (draft board), 33, 44, and 49 y (current age). Obesity was categorized as BMI $ 31 kg/m2. Dietary intake for 7 d and physical activity (PA) level (PAL) were self-reported. Resting metabolic rate (RMR) was measured in a ventilated hood system. By comparing EI with energy expenditure and assuming energy balance, reporting accuracy (RA) was estimated as EI/(RMR-PAL). A plausibility interval was calculated to encompass specific variation components of EI, RMR, and PAL; the specific 95% plausibility interval was 1.00 6 0.35. Participants were categorized as underreporters (RA # 0.65), plausible reporters (0.65 , RA # 1.35), or overreporters (RA . 1.35) of EI. The relation between RA and BMI was studied through linear regression analysis. Overall, the RA was (mean 6 SE) 0.76 6 0.01. Of 309 participants, 35% underreported and 7% overreported. Whether stratified for current BMI or draft board BMI, the obese men were more likely to underreport than those who were not obese. Among those currently not obese, underreporting was more prevalent among those who were obese at the draft board examination (44%) than among those who were not (21%). Regression analysis showed that both previous and current BMI and their combination were significantly associated with RA. Thus, underreporting of dietary intake seems to be associated with not only current BMI but also with current BMI in combination with previous BMI.
AB - Our objectives were to estimate the degree of misreporting energy intake (EI) and analyze associations with previous BMI, current BMI, or both. The study was part of the Adiposity and Genetics Study follow-up study including 309 Danish men (age 40-65 y) originally sampled from the obligatory draft board examination. Height and weight were measured at the mean ages of 20 (draft board), 33, 44, and 49 y (current age). Obesity was categorized as BMI $ 31 kg/m2. Dietary intake for 7 d and physical activity (PA) level (PAL) were self-reported. Resting metabolic rate (RMR) was measured in a ventilated hood system. By comparing EI with energy expenditure and assuming energy balance, reporting accuracy (RA) was estimated as EI/(RMR-PAL). A plausibility interval was calculated to encompass specific variation components of EI, RMR, and PAL; the specific 95% plausibility interval was 1.00 6 0.35. Participants were categorized as underreporters (RA # 0.65), plausible reporters (0.65 , RA # 1.35), or overreporters (RA . 1.35) of EI. The relation between RA and BMI was studied through linear regression analysis. Overall, the RA was (mean 6 SE) 0.76 6 0.01. Of 309 participants, 35% underreported and 7% overreported. Whether stratified for current BMI or draft board BMI, the obese men were more likely to underreport than those who were not obese. Among those currently not obese, underreporting was more prevalent among those who were obese at the draft board examination (44%) than among those who were not (21%). Regression analysis showed that both previous and current BMI and their combination were significantly associated with RA. Thus, underreporting of dietary intake seems to be associated with not only current BMI but also with current BMI in combination with previous BMI.
KW - Adult
KW - Basal Metabolism
KW - Body Mass Index
KW - Body Size
KW - Denmark
KW - Energy Intake
KW - Energy Metabolism
KW - Humans
KW - Male
KW - Middle Aged
KW - Obesity/epidemiology
KW - Physical Examination
KW - Regression Analysis
KW - Reproducibility of Results
KW - Socioeconomic Factors
KW - Surveys and Questionnaires
KW - Weight Loss
KW - Young Adult
U2 - 10.3945/jn.109.112599
DO - 10.3945/jn.109.112599
M3 - Journal article
C2 - 19828683
SN - 0022-3166
VL - 139
SP - 2337
EP - 2343
JO - The Journal of Nutrition
JF - The Journal of Nutrition
IS - 12
ER -