It is well known that children with chronic physical illness are more likely to develop psychological problems than children who are otherwise healthy. By exploring the Growing Up in Ireland (GUI) study, this project aims to investigate the relationship between early childhood chronic illnesses (such as asthma, diabetes, and cerebral palsy among many more) and how these may impact on psychological difficulties later in the teenage years. The GUI study follows the progress of two groups; 1) children who were aged 9 during the first interview in 2007 and 2) infants aged 9 months in 2008. It is an example of a longitudinal study which means that the same children are involved at each subsequent visit. Each visit aims to elicit the views of the children, carers, teachers, etc. through questions that are suited to quantitative analysis. One of the founding objectives of this study was to “establish the effects of early childhood experiences on later life”. It is my hope that by investigating the association between chronic illness in childhood and psychological difficulties in adolescence, I can identify any areas related to the management of these conditions that may be altered with the aim of improving outcomes