@article{KoebnickWagnerThieleckeetal.2005,
  author    = {Koebnick, Corinna and Wagner, K. and Thielecke, F. and Moeseneder, Jutta and Hoehne, A. and Franke, A. and Meyer, H. and Garcia, Ada and Trippo, U. and Zunft, Hans-Joachim Franz},
  title     = {Validation of a simplified physical activity record by doubly labeled water technique},
  issn      = {0307-0565},
  year      = {2005},
  abstract  = {INTRODUCTION: For obtaining reliable information about physical activity in epidemiological studies, validated and easy-to-use instruments are required. Therefore, a new simplified physical activity record based on 15-min recording intervals was developed and validated. SUBJECTS: Nonobese volunteers (n = 31). MEASUREMENTS: Physical activity was recorded over a 7-day period without detailed instructions. Energy expenditure was calculated (EEsPAR) and compared to energy expenditure measured by doubly labelled water technique (EEDLW). RESULTS: A good agreement between EEsPAR (12.1 +/ 3.0) and EEDLW (11.7 +/- 3.3) with a mean difference of 0.33 +/- 1.55 MJ (r = 0.880, P < 0.001) was observed. The absolute difference between EEsPAR and EEDLW was <10\% in 65\% of the subjects. The difference between EEsPAR and EEDLW was independent of gender, age, body weight, and body mass index. A weak positive association between the difference and total body fat was observed (r = 0.618, P < 0.001), suggesting a slight tendency to overestimate EEsPAR with increasing total body fat. CONCLUSION: The new simplified physical activity protocol needs no detailed instructions, provides valid estimates of physical activity in nonobese free-living adults and can be used in epidemiological studies to assess total daily energy expenditure and physical activity level},
  language  = {en}
}
@article{KoebnickWagnerThieleckeetal.2005,
  author    = {Koebnick, Corinna and Wagner, K. and Thielecke, F. and Dieter, G. and Hohne, A. and Franke, A. and Garcia, Ada and Meyer, H. and Hoffmann, I. and Leitzmann, P. and Trippo, U. and Zunft, Hans-Joachim Franz},
  title     = {An easy-to-use semiquantitative food record validated for energy intake by using doubly labelled water technique},
  issn      = {0954-3007},
  year      = {2005},
  abstract  = {Background: Estimating dietary intake is important for both epidemiological and clinical studies, but often lacks accuracy. Objective: To investigate the accuracy and validity of energy intake estimated by an easy-to-use semiquantitative food record (EISQFR) compared to total energy expenditure ( TEE) estimated by doubly labelled water technique (EEDLW). Design: TEE was measured in 29 nonobese subjects using the doubly labelled water method over a period of 14 days. Within this period, subjects reported their food consumption by a newly developed semiquantitative food record for 4 consecutive days. Energy intake was calculated using the German Food Code and Nutrition Data Base BLS II.3. Results: A good correlation was observed between EISQFR and EEDLW (r = 0.685, P<0.001). The mean difference between EISQFR and EEDLW was - 1.7 +/- 2.6 MJ/ day ( - 14 +/- 21\%, P = 0.002). An underestimation of EISQFR <10\% was observed in nine subjects (31\%), of 10 - 20\% in six subjects (21\%), and of >20\% in nine subjects (31\%). In five subjects (17\%), an overestimation of EISQFR was observed. Conclusions: The easy-to-use semiquantitative food record provided good estimates of EI in free-living and nonobese adults without prior detailed verbal instructions. The presented food record has limitations regarding accuracy at the individual level},
  language  = {en}
}