Parents who are actively involved in the child's life and the child's thoughts about smoking play a major role in preventing smoking - even if the child also experiences smoking in their everyday life. Parents continue to be of great importance when the child hits the teenage years. If parents have a negative attitude towards the child's smoking, it weighs heavier than friends' possible positive attitude towards smoking, and this can be a support to say no to, for example, peer pressure. This applies regardless of whether the parents themselves smoke or not.