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|Title: ||A comparison of the National Center for Health Statistics and new World Health Organization growth references for school-age children and adolescents with the use of data from 11 low-income countries|
|Authors: ||Rousham, Emily K.|
Baylon, Melba A.B.
Bobrow, Emily A.
Campion, M. Gerda
Mahumane, Bonifacio J.
Parawan, Amado R.
Patterson, David W.
Khandaker, Ikhtiar U.
|Issue Date: ||2011|
|Publisher: ||© American Society of Clinical Nutrition|
|Citation: ||ROUSHAM, E.K. ... et al., 2011. A comparison of the National Center for Health Statistics and new World Health Organization growth references for school-age children and adolescents with the use of data from 11 low-income countries. American Journal of Clinical Nutrition, 94 (2), pp. 571-577.|
|Abstract: ||BACKGROUND: In 2007 new WHO growth references for children aged 5-19 years were introduced to replace the NCHS references. OBJECTIVE: The study aimed to compare the prevalence of stunting, wasting and thinness estimated by the NCHS and WHO growth references. DESIGN: NCHS and WHO height-for-age z-scores were calculated using cross-sectional data from 20,605 schoolchildren aged 5-17 years in 11 low income countries. The differences in the percentage of stunted children were estimated for each year of age and sex. Z-scores of BMI-for-age and weight-for-height were calculated using the WHO and NCHS references respectively to compare differences in the prevalence of thinness and wasting. RESULTS: No systematic differences in mean z-scores of height-for-age were observed between the WHO and NCHS growth references. However, z-scores of height-for-age varied by sex and age, particularly during early adolescence. Among children for whom weight-for-height could be calculated, the estimated prevalence of thinness (WHO reference) was consistently higher than the prevalence of wasting (NCHS reference) by as much as 9% in girls and 18% in boys. CONCLUSION: In undernourished populations, the application of the WHO (2007) references may result in differences in the prevalence of stunting for each sex compared with using the NCHS references, as well as a higher estimated prevalence of thinness compared with wasting. An awareness of these differences is important for comparative studies or when evaluating programs. For school-age children and adolescents across all ranges of anthropometric status, the same growth references should be applied when undertaking such studies.|
|Description: ||The published version of this article is available at: http://dx.doi.org/10.3945/ajcn.110.008300.|
|Version: ||Accepted for publication|
|Publisher Link: ||http://dx.doi.org/10.3945/ajcn.110.008300|
|Appears in Collections:||Closed Access (Sport, Exercise and Health Sciences)|
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