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[Application of different spatial interpolation methods in sodium intake estimation].

Kehong Fang1, Yuehui Fang1, Yiyao Lian1

  • 1National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing 100050, China.

Wei Sheng Yan Jiu = Journal of Hygiene Research
|May 14, 2021
PubMed
Summary
This summary is machine-generated.

Spatial interpolation accurately estimates dietary sodium intake across China. The Regression Kriging method proved most effective, revealing regional variations in sodium consumption among adults.

Keywords:
dietary sodiumestimation of intakenutrition surveyspatial interpolation methods

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Area of Science:

  • Nutrition Science
  • Geospatial Analysis
  • Public Health

Background:

  • Dietary sodium intake is a significant public health concern globally.
  • Accurate estimation of sodium intake is crucial for developing targeted interventions.
  • Previous dietary sodium intake data in China had geographical limitations.

Purpose of the Study:

  • To estimate dietary sodium intake in areas of China lacking direct data.
  • To compare the accuracy of different spatial interpolation methods for sodium intake estimation.
  • To map regional variations in dietary sodium intake across China.

Main Methods:

  • Utilized data from the 2010-2012 China National Nutrition and Health Surveillance (CNNHS).
  • Employed spatial analysis techniques including Inverse Distance Weight, Ordinary Kriging, Cooperative Kriging, and Regression Kriging.
  • Compared the accuracy of these methods and selected the most precise one (Regression Kriging) for estimation.

Main Results:

  • The Regression Kriging Interpolation method demonstrated superior accuracy (RMSE: 0.54, MAE: 0.44).
  • Estimated national average sodium intake was 5.17 g/d, with variations between men (5.33 g/d) and women (5.01 g/d).
  • Significant regional disparities were observed, with Shandong, Tianjin, and Hebei having the highest intake, and Guizhou the lowest.

Conclusions:

  • Spatial interpolation, particularly Regression Kriging, is a reliable method for estimating dietary sodium intake.
  • The study successfully mapped geographical variations in sodium consumption in China.
  • Findings provide valuable data for public health strategies aimed at reducing sodium intake.