ABSTRACT
Reliable measures of body composition are essential to develop effective policies to tackle obesity. The lack of an acceptable gold-standard for measuring fatness has made it difficult to evaluate alternative measures of obesity. We use latent class analysis to characterise existing diagnostics. Using data on US adults we show that measures based on body mass index and bioelectrical impedance analysis misclassify large numbers of individuals. For example, 45% of obese White women are misclassified as non-obese using body mass index, while over 50% of non-obese White women are misclassified as being obese using bioelectrical impedance analysis. In contrast the misclassification rates are low when waist circumference is used to measure obesity. These results have important implications for our understanding of differences in obesity rates across time and groups, as well as posing challenges for the econometric analysis of obesity.
Subject(s)
Body Mass Index , Electric Impedance , Obesity/diagnosis , Waist Circumference , Adolescent , Adult , Aged , Aged, 80 and over , Body Weights and Measures , Child , Child, Preschool , Female , Humans , Infant , Male , Middle Aged , Nutrition Surveys , Obesity/ethnology , Sex Factors , Young AdultABSTRACT
The effectiveness of the Incredible Years Basic parent programme (IYBP) in reducing child conduct problems and improving parent competencies and mental health was examined in a 12-month follow-up. Pre- to post-intervention service use and related costs were also analysed. A total of 103 families and their children (aged 32-88 months), who previously participated in a randomised controlled trial of the IYBP, took part in a 12-month follow-up assessment. Child and parent behaviour and well-being were measured using psychometric and observational measures. An intention-to-treat analysis was carried out using a one-way repeated measures ANOVA. Pairwise comparisons were subsequently conducted to determine whether treatment outcomes were sustained 1 year post-baseline assessment. Results indicate that post-intervention improvements in child conduct problems, parenting behaviour and parental mental health were maintained. Service use and associated costs continued to decline. The results indicate that parent-focused interventions, implemented in the early years, can result in improvements in child and parent behaviour and well-being 12 months later. A reduced reliance on formal services is also indicated.
Subject(s)
Child Behavior Disorders/therapy , Cognitive Behavioral Therapy/methods , Mental Health/economics , Parenting/psychology , Parents/education , Parents/psychology , Child , Child Behavior Disorders/economics , Child Behavior Disorders/psychology , Child, Preschool , Cognitive Behavioral Therapy/economics , Costs and Cost Analysis , Female , Follow-Up Studies , Humans , Ireland , Male , Psychometrics , Treatment Outcome , Vulnerable PopulationsABSTRACT
Early onset of behavioural problems has lasting negative effects on a broad range of lifetime outcomes, placing large costs on individuals, families and society. A number of researchers and policy makers have argued that early interventions aimed at supporting the family is the most effective way of tackling child behaviour problems. This study forms the economic component of a randomised evaluation of the Incredible Years programme, a programme aimed at improving the skills and parenting strategies of parents of children with conduct problems. Our results show that the programme provides a cost-effective way of reducing behavioural problems. Furthermore, our cost analysis, when combined with a consideration of the potential long-run benefits, suggests that investment in such programmes may generate favourable long-run economic returns.
