Table 2. Trends in age-adjusted least square mean (standard error) values for waist circumference.

	1998	2001	2005	2007–2009	2010–2012	P for trend (1998 to 2012)	P for trend (2001 to 2012)
Waist circumference (cm)
Boys and girls
Boys and girls, aged 2–19 years		63.13 (0.21)	62.08 (0.23)	61.81 (0.15)	61.21 (0.16)		<0.0001
Boys and girls, aged 2–9 years		55.90 (0.23)	53.94 (0.22)	54.10 (0.16)	53.74 (0.20)		<0.0001
Boys and girls, aged 10–19 years	68.60 (0.27)	70.77 (0.30)	69.82 (0.36)	69.49 (0.21)	68.88 (0.21)	0.350	<0.0001
Boys
Boys, aged 2–19 years		64.54 (0.28)	63.53 (0.30)	63.45 (0.19)	62.60 (0.22)		<0.0001
Boys, aged 2–9 years		56.36 (0.33)	54.59 (0.32)	54.99 (0.20)	54.72 (0.28)		0.001
Boys, aged 10–19 years	70.15 (0.32)	73.48 (0.45)	72.05 (0.49)	71.84 (0.28)	70.74 (0.31)	0.655	<0.0001
Girls
Girls, aged 2–19 years		61.56 (0.25)	60.46 (0.30)	59.98 (0.18)	59.67 (0.20)		<0.0001
Girls, aged 2–9 years		55.32 (0.29)	53.22 (0.31)	53.13 (0.19)	52.67 (0.22)		<0.0001
Girls aged 10–19 years	66.99 (0.33)	67.86 (0.34)	67.35 (0.46)	66.84 (0.26)	66.80 (0.30)	0.160	0.009