Metabolic syndrome refers to a condition in which a person carries several risk factors associated with type 2 diabetes and cardiovascular diseases. Traditionally, these risk factors have included overweight and abdominal obesity, reduced muscle, adipose tissue and liver insulin sensitivity and related glucose metabolism disorders, increased levels of plasma triglyceride, decreased levels of plasma HDL cholesterol, and increased blood pressure. As overweight has become increasingly widespread, the clustering of metabolic risk factors has become increasingly common also in children. If no improvement in exercise and nutrition habits takes place in childhood, metabolic syndrome is likely to persist into adulthood, increasing the risk of type 2 diabetes, cardiovascular diseases and premature death. Up until recently, the definition of metabolic syndrome has been a controversial topic especially in children, although the components of metabolic syndrome have been known for a long time. It has also been unclear whether the components of metabolic syndrome are the same in children and adults.

The study showed that the components of metabolic syndrome cluster similarly in children and adults of different ages irrespective of sex. However, abdominal obesity was relatively less emphasised in children than in adults, and increased blood pressure was relatively more emphasised in middle-aged men than in children and older men and women. As expected, the risk factor score was higher in adults than in children. The observed cumulation of metabolic risk factors in all age groups increased the risk of premature death due to type 2 diabetes, myocardial infarction and cardiovascular diseases in adults.