, 1999 and McCarthy et al , 2003) Recent UK trends suggest that

, 1999 and McCarthy et al., 2003). Recent UK trends suggest that the rate of increase in obesity prevalence may have slowed (Stamatakis et al., 2010), selleck chemicals as in some other countries (Han et al., 2010). However, social patterning of overweight and obesity in UK children and adolescents is increasing (Stamatakis et al., 2010). Many studies of obesity prevalence have taken place, but there is a dearth of evidence on the ‘natural history’ of obesity ( Whitaker, 2002 and Reilly et al., 2007). Only a few studies have reported on the

incidence of child and adolescent obesity ( Andersen et al., 2010, Gortmaker et al., 1996, Hesketh et al., 2003, Nader et al., 2006 and Plachta-Danielzik et al., 2010), and none have reported on incidence across childhood and adolescence. Evidence on incidence of overweight and obesity by age group would be helpful to prevention strategies: periods of highest incidence might merit highest priority in preventive interventions. find more A recent review ( Nichols and Swinburn, 2010) found that decision-making in choice of target population for obesity prevention is rarely explicit. Specific periods of childhood and adolescence

might be particularly important to the establishment of health behaviours related to obesity, and identifying whether incidence of obesity is highest in early childhood (e.g. 3–7 years), mid–late childhood (7–11 years), or adolescence (beyond 11 years) could inform preventive interventions. The primary aim of the present study was therefore to estimate the incidence of overweight Mephenoxalone and obesity across childhood and adolescence in a large, contemporary, cohort of English children. A secondary aim was to examine the persistence of overweight and obesity. ALSPAC (The Avon Longitudinal Study of Parents and Children) is a large prospective cohort study of children born in the South-West of England

in 1991/1992; study design and methods are described elsewhere (Ness, 2004 and Golding and the ALSPAC Study Team, 1996). Briefly, 14,541 pregnant women with an expected date of delivery between April 1991 and December 1992 were enrolled, resulting in 13,988 participating children alive at one year. Detailed information has been collected using self-administered questionnaires, data extraction from medical notes, linkage to routine information systems and at research clinics for children. A 10% sample of the ALSPAC cohort, the Children in Focus (CiF) group, attended research clinics at 4, 8, 12, 18, 25, 31, 37, 43, 49, and 61 months where detailed physical examinations were undertaken. The CiF group was broadly socio-economically representative of the entire ALSPAC cohort and the UK (Reilly et al., 2005). From age 7, the entire ALSPAC cohort was invited to attend regular research clinics.

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