Waist circumference and waist-to-height ratio in Norwegian children 4–18 years of age: Reference values and cut-off levels
Article first published online: 16 JUN 2011
© 2011 The Author(s)/Acta Pædiatrica © 2011 Foundation Acta Pædiatrica
Volume 100, Issue 12, pages 1576–1582, December 2011
How to Cite
Brannsether, B., Roelants, M., Bjerknes, R. and Júlíusson, P. (2011), Waist circumference and waist-to-height ratio in Norwegian children 4–18 years of age: Reference values and cut-off levels. Acta Paediatrica, 100: 1576–1582. doi: 10.1111/j.1651-2227.2011.02370.x
- Issue published online: 8 NOV 2011
- Article first published online: 16 JUN 2011
- Accepted manuscript online: 31 MAY 2011 10:03AM EST
- Received 15 February 2011; revised 1 May 2011; accepted 27 May 2011.
- Central overweight;
- Growth references;
- Waist circumference;
- Waist-to-height ratio
Aim: To establish reference values for waist circumference and waist-to-height ratio of Norwegian children.
Material: Data were collected in 2003–2006 as part of a cross-sectional study, including 5725 children 4–18 years of age. Reference curves were fitted with the LMS method; appropriate cut-offs were selected using receiver operating characteristic analysis.
Results: Reference values for waist circumference and waist-to-height ratio are presented. Mean waist circumference increased with age for both genders. Boys had a higher waist circumference at almost all ages. Mean waist-to-height ratio decreased until early adolescence and thereafter increased slightly towards adult age. There was a strong positive correlation between waist circumference and BMI (r = 0.907, p < 0.01) and a moderate positive correlation between waist-to-height ratio and BMI (r = 0.397 p < 0.01). A waist circumference cut-off value of 1.0 SDS (85th percentile) gave a sensitivity of 79% and a specificity of 94% to detect overweight. A cut-off value of 1.6 SDS (95th percentile) gave a sensitivity of 94% and a specificity of 96% to detect obesity.
Conclusion: This study presents the first reference values of waist circumference and waist-to-height ratio for Norwegian children 4–18 years, which also represent the first reference in Scandinavian schoolchildren. The 85th and 95th percentiles of waist circumference are proposed as appropriate cut-offs for central overweight and obesity.