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International Journal of Biometeorology

, Volume 58, Issue 5, pp 769–779 | Cite as

Predictive models and spatial variations of vital capacity in healthy people from 6 to 84 years old in China based on geographical factors

  • Jinwei He
  • Miao GeEmail author
  • Congxia WangEmail author
  • Naigui Jiang
  • Mingxin Zhang
  • Pujun Yun
Original Paper

Abstract

The aim of this study was to provide a scientific basic for a unified standard of the reference value of vital capacity (VC) of healthy subjects from 6 and 84 years old in China. The normal reference value of VC was correlated to seven geographical factors, including altitude (X 1), annual duration of sunshine (X 2), annual mean air temperature (X 3), annual mean relative humidity (X 4), annual precipitation amount (X 5), annual air temperature range (X 6) and annual mean wind speed (X 7). Predictive models were established by five different linear and nonlinear methods. The best models were selected by t-test. The geographical distribution map of VC in different age groups can be interpolated by Kriging’s method using ArcGIS software. It was found that the correlation of VC and geographical factors in China was quite significant, especially for both males and females aged from 6 to 45. The best models were built for different age groups. The geographical distribution map shows the spatial variations of VC in China precisely. The VC of healthy subjects can be simulated by the best model or acquired from the geographical distribution map provided the geographical factors for that city or county of China are known.

Keywords

Vital capacity Geographical factor Modeling Spatial variation 

Notes

Acknowledgments

The authors would like to thank all of the volunteers that took part in this study and the people for their assistance in technical and laboratory support. This study was supported by the National Natural Science Foundation of China (No. 40671005) and Innovation Funds of Graduate Programs (SNU, No. 2012CXB012).

Conflict of interest statement

None of the authors have any financial or other potential conflict of interest for this study.

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Copyright information

© ISB 2013

Authors and Affiliations

  1. 1.Institute of Healthy Geography, College of Tourism and EnvironmentShaanxi Normal UniversityXi’anChina
  2. 2.Second Affiliated Hospital of Medical CollegeXi’an Jiaotong UniversityXi’anChina

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