New Zealand has one of the highest rates of childhood obesity in the OECD1 and even our infants and pre-schoolers are affected by this public health crisis; the most recent NZ Health Survey found one in eleven (9.2%) 2–4 year olds are obese and a further 20.6% are overweight2. Obesity at such a young age often sets children on a life-course risk trajectory of mental and physical health problem3, including cardiovascular disease, type 2 diabetes and some cancers4,5. With this high prevalence of obesity among pre-schoolers–and growing evidence that dietary habits, preferences and eating behaviours are set early in childhood6 –obesity prevention in the first few years of life is critical7.
A key environment for obesity prevention may be early childhood education (ECE). Statistics NZ reports that half of all under 5s attend ECE, rising to over 80% of 4 year olds8 . Childcare may influence a child’s weight by changing dietary patterns, and eating or physical activity behaviour. However, the few overseas studies in this area have produced conflicting results; some showed a link between childcare attendance and an increased risk of obesity9,10,15 some found an association only when care was provided by a relative/friend11,12,13,14and some found childcare was protective against obesity.16,17
This PhD research uses data collected in the Growing Up in New Zealand longitudinal study18 of approximately 6800 children from before birth until 4.5 years old, to explore the role of childcare in shaping dietary patterns and body weight in pre-schoolers. Additional data will also be collected from the cohort children’s childcare providers to examine the ‘obesogenic’ nature of policies and practices in ECE settings. Informed by a public health perspective, analyses will focus on modifiable factors which can be influenced by policy in order to reduce the burden of obesity-related health issues on future generations.