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A bivariate measurement error model for nitrogen and potassium intakes to evaluate the performance of regression calibration in the European prospective investigation into cancer and nutrition study

(2009) EUROPEAN JOURNAL OF CLINICAL NUTRITION. 63(Suppl. 4). p.S179-S187
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Abstract
Objectives: Within the European Prospective Investigation into Cancer and Nutrition (EPIC) study, the performance of 24-h dietary recall (24-HDR) measurements as reference measurements in a linear regression calibration model is evaluated critically at the individual (within-centre) and aggregate (between-centre) levels by using unbiased estimates of urinary measurements of nitrogen and potassium intakes. Methods: Between 1995 and 1999, 1072 study subjects (59% women) from 12 EPIC centres volunteered to collect 24-h urine samples. Log-transformed questionnaire, 24-HDR and urinary measurements of nitrogen and potassium intakes were analysed in a multivariate measurement error model to estimate the validity of coefficients and error correlations in self-reported dietary measurements. In parallel, correlations between means of 24-HDR and urinary measurements were computed. Linear regression calibration models were used to estimate the regression dilution (attenuation) factors. Results: After adjustment for sex, centre, age, body mass index and height, the validity coefficients for 24-HDRs were 0.285 (95% confidence interval: 0.194, 0.367) and 0.371 (0.291, 0.446) for nitrogen and potassium intakes, respectively. The attenuation factors estimated in a linear regression calibration model were 0.368 (0.228, 0.508) for nitrogen and 0.500 (0.361, 0.639) for potassium intakes; only the former was different from the estimate obtained using urinary measurements in the measurement error model. The aggregate-level correlation coefficients between means of urinary and 24-HDR measurements were 0.838 (0.637, 0.932) and 0.756 (0.481, 0.895) for nitrogen and potassium intakes, respectively. Conclusions: This study suggests that 24-HDRs can be used as reference measurements at the individual and aggregate levels for potassium intake, whereas, for nitrogen intake, good performance is observed for between-centre calibration, but some limitations are apparent at the individual level. European Journal of Clinical Nutrition (2009) 63, S179-S187; doi: 10.1038/ejcn.2009.80
Keywords
BIOMARKER, EPIDEMIOLOGY, CALIBRATION, RECALL, VALIDATION

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Please use this url to cite or link to this publication:

Chicago
Ferrari, P, A Roddam, MT Fahey, M Jenab, C Bamia, M Ocke, P Amiano, et al. 2009. “A Bivariate Measurement Error Model for Nitrogen and Potassium Intakes to Evaluate the Performance of Regression Calibration in the European Prospective Investigation into Cancer and Nutrition Study.” European Journal of Clinical Nutrition 63 (Suppl. 4): S179–S187.
APA
Ferrari, P., Roddam, A., Fahey, M., Jenab, M., Bamia, C., Ocke, M., Amiano, P., et al. (2009). A bivariate measurement error model for nitrogen and potassium intakes to evaluate the performance of regression calibration in the European prospective investigation into cancer and nutrition study. EUROPEAN JOURNAL OF CLINICAL NUTRITION, 63(Suppl. 4), S179–S187.
Vancouver
1.
Ferrari P, Roddam A, Fahey M, Jenab M, Bamia C, Ocke M, et al. A bivariate measurement error model for nitrogen and potassium intakes to evaluate the performance of regression calibration in the European prospective investigation into cancer and nutrition study. EUROPEAN JOURNAL OF CLINICAL NUTRITION. 2009;63(Suppl. 4):S179–S187.
MLA
Ferrari, P, A Roddam, MT Fahey, et al. “A Bivariate Measurement Error Model for Nitrogen and Potassium Intakes to Evaluate the Performance of Regression Calibration in the European Prospective Investigation into Cancer and Nutrition Study.” EUROPEAN JOURNAL OF CLINICAL NUTRITION 63.Suppl. 4 (2009): S179–S187. Print.
@article{1177583,
  abstract     = {Objectives: Within the European Prospective Investigation into Cancer and Nutrition (EPIC) study, the performance of 24-h dietary recall (24-HDR) measurements as reference measurements in a linear regression calibration model is evaluated critically at the individual (within-centre) and aggregate (between-centre) levels by using unbiased estimates of urinary measurements of nitrogen and potassium intakes.
Methods: Between 1995 and 1999, 1072 study subjects (59% women) from 12 EPIC centres volunteered to collect 24-h urine samples. Log-transformed questionnaire, 24-HDR and urinary measurements of nitrogen and potassium intakes were analysed in a multivariate measurement error model to estimate the validity of coefficients and error correlations in self-reported dietary measurements. In parallel, correlations between means of 24-HDR and urinary measurements were computed. Linear regression calibration models were used to estimate the regression dilution (attenuation) factors.
Results: After adjustment for sex, centre, age, body mass index and height, the validity coefficients for 24-HDRs were 0.285 (95% confidence interval: 0.194, 0.367) and 0.371 (0.291, 0.446) for nitrogen and potassium intakes, respectively. The attenuation factors estimated in a linear regression calibration model were 0.368 (0.228, 0.508) for nitrogen and 0.500 (0.361, 0.639) for potassium intakes; only the former was different from the estimate obtained using urinary measurements in the measurement error model. The aggregate-level correlation coefficients between means of urinary and 24-HDR measurements were 0.838 (0.637, 0.932) and 0.756 (0.481, 0.895) for nitrogen and potassium intakes, respectively.
Conclusions: This study suggests that 24-HDRs can be used as reference measurements at the individual and aggregate levels for potassium intake, whereas, for nitrogen intake, good performance is observed for between-centre calibration, but some limitations are apparent at the individual level. European Journal of Clinical Nutrition (2009) 63, S179-S187; doi: 10.1038/ejcn.2009.80},
  author       = {Ferrari, P and Roddam, A and Fahey, MT and Jenab, M and Bamia, C and Ocke, M and Amiano, P and Hjartaker, A and Biessy, C and Rinaldi, S and Huybrechts, Inge and Tjonneland, A and Dethlefsen, C and Niravong, M and Clavel-Chapelon, F and Linseisen, J and Boeing, H and Oikonomou, E and Orfanos, P and Palli, D and de Magistris, MS and Bueno-de-Mesquita, HB and Peeters, PHM and Parr, CL and Braaten, T and Dorronsoro, M and Berenguer, T and Gullberg, B and Johansson, I and Welch, AA and Riboli, E and Bingham, S and Slimani, N},
  issn         = {0954-3007},
  journal      = {EUROPEAN JOURNAL OF CLINICAL NUTRITION},
  keywords     = {BIOMARKER,EPIDEMIOLOGY,CALIBRATION,RECALL,VALIDATION},
  language     = {eng},
  number       = {Suppl. 4},
  pages        = {S179--S187},
  title        = {A bivariate measurement error model for nitrogen and potassium intakes to evaluate the performance of regression calibration in the European prospective investigation into cancer and nutrition study},
  url          = {http://dx.doi.org/10.1038/ejcn.2009.80},
  volume       = {63},
  year         = {2009},
}

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