Researchers at Hedmark college found that it was likely that children who were bullied suffered poor psychological health and poor grades at primary and secondary school, the Dagens Medisin journal wrote.
The study was carried out by Professor Lars Lien among 3,674 school pupils in Oslo. 337 15-year old pupils said they’d been bullied, whereas just 48 pupils three years further up suffered from bullying.
“The results show that it’s important to follow up pupils who have suffered bullying in Year 10. The idea that all bullying disappears when children change environments is clearly wrong. Some people are vulnerable to bullying, and when this is combined with poor psychological health or poor school performance people should be particularly on guard,” he said.