Figure 3.

The 50th percentiles for waist circumference in seven studies for boys and girls. Data in the present study were collected among children aged 6-12 years in 2008; Data from Australian children aged 7-15 years were collected in 1985 [18]; Data of children aged 7-18 years from Xinjiang province, China were collected in 2005 [25]; Data from Turkish children aged 7-17 years were collected in 2005 [17]; Data from British children aged 5-16 years were collected in 1990 [21]; Data from Hong Kong Chinese children aged 6-18 years was collected in 2002-2004 [24]; Data from Mexican children aged 6-10 years (collection date unknown) [23].