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Background: Few studies have examined the prevalence of weight problems before the age of 5 years although this period is critical in the development of obesity. An inverse association between socio-economic status and weight problems is well documented in adult women but not for young children. Similarly several studies of adults and adolescents or older children show that the prevalence of weight problems is associated with the level of deprivation of the neighbourhood environment and the degree of urbanization, independent of social individual factors, even though this has not been examined for young children., Methods: We evaluated prevalence rates of weight problems in children aged 3.5-4.5 years in southeastern France and their association with both individual social factors and municipal environment characteristics. Random stratified cluster sampling allowed us to select 112 nursery schools. Physicians from the early childhood protective services conducted a mandatory medical examination and collected data with a new questionnaire (EVALMATER), developed to standardise these examinations. Overweight and obesity were defined by international references after calculation of each child's BMI (kg/m(2)). We constructed a social disadvantage index to assess characteristics of the municipalities where the nursery schools were located and used multilevel analysis to study the associations of municipal characteristics (the disadvantage index and a urban/rural classification of the municipalities) with weight problems independently of individual socio-economic variables., Results: The study included 2495/2959 (84.3%) children, with a mean age of 3.9+/-0.3 years. The prevalence of overweight was 8.2% (CI95%=7.1-9.3) and that of obesity 2.1% (CI95%=1.5-2.7). Prevalence of obesity was significantly higher in girls, only children, those who had not attended day-care before nursery school, whose mother was not employed, or whose father was not a white-collar-worker. Independently of these variables, it was also significantly higher among children who lived in urban areas or deprived municipalities. None of these factors were found associated with overweight alone., Conclusion: Actions of prevention in France should target parents of young children.

Background: This paper is aimed at investigating the extents to which illness modifies labour supply and employment conditions of people with chronic diseases (defined as severe diseases giving rise to 100% coverage of health expenditures by the Sickness Fund)., Methods: It is based on the data of 35073 individuals interviewed in the 2002-2003 French Decennial Health Survey, reporting their health, health care consumption and socioeconomic characteristics, and collected by the French National Institute of Statistics and Economic Studies. Models have been estimated with logistic strategies., Results: Participation in labour market appears, all other things being equal, to be less important for people with chronic diseases. Chronic diseases are more deleterious for blue collar than for white collars workers. The probability to have a part-time job is raised by 60% for people with chronic diseases (100% for men, 50% for women). Suffering from chronic diseases raises the probability to have a desired part-time job rather than a full-time job by 80% (170% for men, 60% for women) and the probability to have an undesired part-time job rather than a full-time job by 50% (30% for men, 50% for women). For the elderly (50-65 years), chronic diseases multiply by three the probability to be out-of-work (and not retired), by two the probability to be retired and by 1.5 the probability to be unemployed compared to being employed., Conclusion: The consequences of chronic diseases on the workplace are not negligible, creating new social inequalities that the French social protection system does not seem to be able to completely cover.