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Anemia in relation to body mass index and waist circumference among chinese women

Yu Qin12, Alida Melse-Boonstra2*, Xiaoqun Pan1, Baojun Yuan1, Yue Dai1, Jinkou Zhao1, Michael B Zimmermann23, Frans J Kok2, Minghao Zhou1 and Zumin Shi14

Author affiliations

1 Department of Chronic Disease Control, Jiangsu Province Centre for Disease Control and Prevention, Nanjing, China

2 Division of Human Nutrition, Wageningen University, Wageningen, The Netherlands

3 Laboratory for Human Nutrition, Swiss Federal Institute of Technology (ETH) Zürich, Zürich, Switzerland

4 Discipline of Medicine, University of Adelaide, Adelaide, Australia

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Citation and License

Nutrition Journal 2013, 12:10  doi:10.1186/1475-2891-12-10

Published: 11 January 2013

Abstract

Background

This study aimed to investigate the relationship of anemia and body mass index among adult women in Jiangsu Province, China. Data were collected in a sub-national cross-sectional survey, and 1,537 women aged 20 years and above were included in the analyses. Subjects were classified by body mass index (BMI) categories as underweight, normal weight, overweight and obese according to the Chinese standard. Central obesity was defined as a waist circumference ≥ 80 cm. Anemia was defined as hemoglobin concentration < 12 g/dl. Prevalence ratios (PRs) of the relationship between anemia and BMI or waist circumference were calculated using Poisson regression.

Findings

Overall, 31.1% of the Chinese women were anemic. The prevalence of overweight, obesity and central obesity was 34.2%, 5.8% and 36.2%, respectively. The obese group had the highest concentrations of hemoglobin compared with other BMI groups. After adjustment for confounders, overweight and obese women had a lower PR for anemia (PR: 0.72, 95% CI: 0.62-0.89; PR: 0.59, 95% CI: 0.43-0.79). Central obesity was inversely associated with anemia.

Conclusion

In this Chinese population, women with overweight/obesity or central obesity were less likely to be anemic as compared to normal weight women. No measures are required currently to target anemia specifically for overweight and obese people in China.

Keywords:
Anemia; Body mass index; Waist circumference; China; Women