Peer pressure and social deprivation are thought to be behind a jump in the number of Northland teenagers smoking, according to experts.
The survey from Action on Smoking and Health New Zealand (ASH) found 7.08 per cent of Northland Year 10 students, normally 14 or 15 years old, surveyed last year were daily smokers. That number was 4.85 per cent in 2013.
Northland District Health Board general manager of mental health and addiction services Kim Tito said the reasons behind why teens smoked were complex.
"The ASH Year 10 survey shows an increase in regular and daily smoking in Northland compared to the previous years and this is of concern," Mr Tito said.
"However some of this may be explained by sampling variability due to changes in the number of schools that participate from year to year."