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Am J Clin Nutr. 2000 Jan;71(1):130-4.

Undereating and underrecording of habitual food intake in obese men: selective underreporting of fat intake.

Author information

1
Department of Human Biology, Maastricht University, Netherlands. a.goris@hb.unimaas.nl

Abstract

BACKGROUND:

Underreporting of food intake is common in obese subjects.

OBJECTIVE:

One aim of this study was to assess to what extent underreporting by obese men is explained by underrecording (failure to record in a food diary everything that is consumed) or undereating. Another aim of the study was to find out whether there was an indication for selective underreporting.

DESIGN:

Subjects were 30 obese men with a mean (+/-SD) body mass index (in kg/m(2)) of 34 +/- 4. Total food intake was measured over 1 wk. Energy expenditure (EE) was measured with the doubly labeled water method, and water loss was estimated with deuterium-labeled water. Energy balance was checked for by measuring body weight at the start and end of the food-recording week and 1 wk after the recording week.

RESULTS:

Mean energy intake and EE were 10.4 +/- 2.5 and 16.7 +/- 2. 4 MJ/d, respectively; underreporting was 37 +/- 16%. The mean body mass loss of 1.0 +/- 1.3 kg over the recording week was significantly different (P < 0.05) from the change in body mass over the nonrecording week, and indicated 26% undereating. Water intake (reported + metabolic water) and water loss were significantly different from each other and indicated 12% underrecording. The reported percentage of energy from fat was a function of the level of underreporting: percentage of energy from fat = 46 - 0.2 x percentage of underreporting (r(2) = 0.28, P = 0.003).

CONCLUSIONS:

Total underreporting by the obese men was explained by underrecording and undereating. The obese men selectively underreported fat intake.

PMID:
10617957
DOI:
10.1093/ajcn/71.1.130
[Indexed for MEDLINE]

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