Prevalence and secular trend of childhood overweight and obesity in a Mediterranean area of Southeast Spain

Figures & data

Table 1. Description and analysis of the variables studied among 6–11 years old schoolchildren in Southeast Spain from 1992 to 2011

	Group 1992 (n = 737)	Group 2011 (n = 620)	p-value^a
Age (years) Median (IQR)	9.02 (2.97)	8.91 (2.94)	0.096
Weight (kg) Median (IQR)	31.65 (13.68)	32.15 (13.68)	0.948
Height (cm) Median (IQR)	132.90 (16.87)	136.65 (18.10)	<0.001
BMI (kg/m^2) Median (IQR)	17.78 (4.48)	17.16 (4.20)	<0.001
Z-score BMI^b Mean (SD)	0.90 (1.22)	0.57 (1.27)	<0.001
Sex % women(n)	44.8 (330)	49.2 (305)	0.061

BMI: Body Mass Index. IQR: Interquartile range. SD: standard deviation.

^aMann-Whitney U test for continuous non-parametric variables. T-student test for continuous parametric variables. Chi-squared for categorical variables.

^bCalculated by LMS method.

Table 2. Trends in the prevalence of BMI categories from 1992 to 2011 among 6–11 years old schoolchildren in Southeast Spain by sex using WHO and IOTF definitions

	Group 1992 (n = 737)		Group 2011 (n = 620)
	% (CI 95%)	n	% (CI 95%)	n	p-value
Overnutrition
WHO
Girls	39.7(34.6–45.1)	131	35.7 (29.6–40.0)	109	0.304
Boys	50.0 (45.3–54.9)	203	36.2 (32.0–42.6)	114	<0.001
Total	45.4 (41.8–48.9)	334	36.0 (32.3–39.8)	223	<0.001
IOTF
Girls	34.8 (30.0–40.1)	115	31.1 (25.4–35.4)	95	0.322
Boys	38.8 (34.2–43.6)	158	29.5 (24.8–34.8)	93	0.009
Total	37.0 (33.6–40.6)	273	30.3 (26.8–34.1)	188	0.009
Overweight
WHO
Girls	26.4 (21.9–31.4)	87	25.9 (20.6–30.1)	79	0.895
Boys	25.4 (21.3–29.8)	103	19.0 (15.1–23.8)	60	0.044
Total	25.8 (22.8–29.1)	190	22.4 (19.3–25.9)	139	0.146
IOTF
Girls	26.4 (21.9–31.4)	87	25.8 (20.6–30.1)	77	0.748
Boys	27.3 (23.2–31.8)	111	20.0 (16.0–24.8)	63	0.023
Total	26.9 (23.8–30.2)	198	22.6 (19.5–26.0)	140	0.069
Obesity
WHO
Girls	13.3 (10.1–17.4)	44	9.8 (6.8–13.3)	30	0.170
Boys	24.6 (20.6–29.0)	100	17.1 (13.4–21.7)	54	0.015
Total	19.6 (16.8–22.6)	144	13.5 (11.1–16.5)	84	0.003
IOTF
Girls	8.5 (5.9–12.0)	28	5.9 (3.6–8.9)	18	0.210
Boys	11.5 (8.8–15.0)	47	9.5 (6.8–13.6)	30	0.382
Total	10.2 (8.2–12.6)	75	7.7 (5.9–10.1)	48	0.120

CI 95%: Confidence Interval of 95%, Overnutrition: overweight plus obesity, WHO: World Health Organization, IOTF: International Obesity Task Force