This study was performed to analyse the prevalence of obesity in child
ren living in six different areas of the north-east of Italy. The stud
y included 1523 children (749 male, 774 female), divided into four age
categories (4, 8, 10, 12 +/- 0.5 years of age, respectively). The phy
sical characteristics of the children were measured by trained and sta
ndardized examiners. In accordance with the guidelines on the Italian
Consensus Conference on Obesity (Rome, 4-6 June 1991), a child was def
ined as obese when his weight was higher than 120% of the weight predi
cted for height, as calculated from the Tanner's tables. On average, t
he prevalence of obesity was higher in males than in females (15.7% vs
. 11%). The highest prevalence was seen in 10-year-old males (23.4%).
The prevalence increased with age both in males (4 years = 3.6%, 8 yea
rs = 11.2%, 10 years = 23.4%, 12 years = 17.3%) and in females (4 year
s = 2%, 8 years = 13.3%, 10 years = 12.7%, 12 years = 11.9%). This ten
dency was maintained when calculating the obesity prevalence by other
methods, such as BMI, triceps skinfold and fat mass, although the magn
itude of the prevalence was different depending on the criteria used t
o define it. A consensus on more precise criteria to define obesity is
needed for a better diagnosis of obesity in childhood and to allow a
more reliable measurement and comparison of the prevalence of obesity
among populations.