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Department of Pediatrics, China-Japan Friendship Hospital, Beijing, China
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Department of Pediatrics, China-Japan Friendship Hospital, Beijing, China
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Department of Pediatrics, China-Japan Friendship Hospital, Beijing, China
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Department of Pediatrics, China-Japan Friendship Hospital, Beijing, China
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Department of Pediatrics, China-Japan Friendship Hospital, Beijing, China
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Introduction Short stature is increasingly recognized as a worldwide public health concern, and it affects about 3% to 11% of children worldwide ( 1 , 2 , 3 , 4 ). In China, the prevalence of short stature was estimated to be 3.7% among
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in China, with over 700 million people in the 1990s being iodine deficient ( 6 ). Chongqing is a municipality directly under the control of central government, which lies in the south-west of China. In 1994, epidemiological studies conducted in
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age of 8 in girls and 9 in boys. In Chinese girls, the incidence was about 1/5,000–1/10,000 ( 1 ); however, the most recent national survey on precocious puberty reported a six-fold increase in incidence for Danish girls (from 2.6/10,000 to 14
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Aim
Ensuring adequate calcium (Ca) intake during childhood and adolescence is critical to acquire good peak bone mass to prevent osteoporosis during older age. As one of the primary strategies to build and maintain healthy bones, we aimed to determine whether dietary Ca intake has an influence on bone mineral density (BMD) in children and adolescents.
Methods
We conducted a cross-sectional study composed of 10,092 individuals from the National Health and Nutrition Examination Survey (NHANES). Dietary Ca intake and total BMD were taken as independent and dependent variables, respectively. To evaluate the association between them, we conducted weighted multivariate linear regression models and smooth curve fittings.
Results
There was a significantly positive association between dietary Ca intake and total BMD. The strongest association was observed in 12–15 year old whites, 8–11 year old and 16–19 year old Mexican Americans, and 16–19 year old individuals from other race/ethnicity, in whom each quintile of Ca intake was increased. We also found that there were significant inflection points in females, blacks, and 12–15 year old adolescents group, which means that their total BMD would decrease when the dietary Ca intake was more than 2.6–2.8 g/d.
Conclusions
This cross-sectional study indicated that a considerable proportion of children and adolescents aged 8–19 years would attain greater total BMD if they increased their dietary Ca intake. However, higher dietary Ca intake (more than 2.6–2.8 g/d) is associated with lower total BMD in females, blacks, and 12–15 year old adolescents group.
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Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, UK
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Field AE Yanovski JA . Self-assessment of pubertal stage in overweight children. Pediatrics 2002 110 743 – 747. ( https://doi.org/10.1542/peds.110.4.743 ) 37 Sun Y Tao FB Su PY & China Puberty Research Collaboration . Self
