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Delivery of a boost of 10 Gy to the tumor bed after 50 Gy to the whole breast following limited surgery significantly reduces the risk of early local recurrence, with no serious deterioration in the cosmetic result. Additional follow-up evaluation will be required to assess the long-term results.

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MA£ECKA-TENDERA, EWA, KATARZYNA KLIMEK, PAWE£ MATUSIK, MAGDALENA OLSZANECKA-GLINIANOWICZ, AND YVES LEHINGUE ON BEHALF OF THE POLISH CHILDHOOD OBESITY STUDY GROUP. Obesity and overweight prevalence in Polish 7-to 9-year-old children. Obes Res. 2005;13:964 -968. Objective: Secular trend in childhood obesity is a wellknown phenomenon, and it is important to monitor it in cross-sectional studies. The study aim was to estimate prevalence of obesity and overweight in Polish 7-to 9-year-old children and to compare the results with a French study based on the same protocol. Research Methods and Procedures:The study was conducted in 2001 according to the protocol of the European Childhood Obesity Group. Height and weight were measured, and BMI was calculated to define nutritional status in a randomly selected group of 2916 (1445 girls and 1471 boys) primary school children. Obesity and overweight were estimated according to International Obesity Task Force references with curve for obesity and overweight passing through 30 and 25 kg/m 2 at age 18, respectively. Results: Overweight (including obesity) was found in 15.4% of Polish children (in 15.8% of girls and 15.0% of boys) and obesity in 3.6% (3.7% of girls and 3.6% of boys) compared with 18.1% of overweight and 3.8% of obese children in French study. There was no significant difference in nutrition status between Polish and French children except for higher frequency of overweight in French 9-yearold boys. The same trend of decreasing overweight through age classes was observed in both populations. Discussion: The prevalence of obesity and overweight (including obesity) in prepubertal children estimated in two European countries according to the same protocol and using the same references showed little differences between the two populations despite higher prevalence of obesity in Polish than French adults.

During the European Congress on Obesity held in Barcelona in 1996, the European Childhood Obesity Group (ECOG) proposed a study designed to estimate the prevalence of obesity by country. An overview of existing systems revealed that most countries have no suitable structure in place for the determination of obesity in children and that the most practical sources of samples would be the school systems. A protocol was drawn up for these countries, whereas for those countries already collecting data, guidelines were defined to clarify the criteria allowing inclusion in the common analysis. The target population is 7-9-y-old children. The study design consists of separate cross-sectional population studies by country with a cluster probability sample of 2000 children attending primary school. The minimum common data will be age, weight, height, and hip, thigh, and waist circumferences. The participating countries will be encouraged to collect harmonized data on social indicators, lifestyle, diet, physical activity, and anthropometric measures of the parents. Children will be measured either by centrally based traveling examiners or, in countries with limited resources, by local staff. Each country will computerize its own data and send a copy to a center responsible for the common analysis. The main analysis will be of body mass index distribution in children from the different populations and determination of the proportion of children with a BMI above the 90th percentile of a common reference population. Members of the ECOG in 14 European countries have confirmed their interest in the project.

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