The first Australian study into links between weight and quality of life has found that excess weight is associated with poor mental health. Study co-author, Professor Brenda Happell, said that the study is the first to demonstrate a link between excess weight and poor mental health in the Australian population. The research was undertaken among the general adult population in Queensland and in this population sample, excess weight was associated with poorer physical health. In addition, significant associations were observed between excess weight and poor mental health for particular age groups. Obesity had a significant association with poor mental wellbeing for individuals who are aged 45 to 54 years.