Non-smoking adults have a higher risk of dying from serious lung disease if they grew up with parents who smoked, according to U.S. research.
The researchers said childhood passive smoking was "likely to add seven deaths to every 100,000 non-smoking adults dying annually". The study of 70,900 non-smoking men and women was led by the American Cancer Society. Experts said the best way to protect children was to quit smoking.
If participants lived with a smoker during adulthood, there were other health implications, the study found.
Smoke exposure of 10 or more hours every week increased their risk of death from ischemic heart disease by 27%, stroke by 23% and chronic obstructive lung disease by 42% compared to those who lived with non-smokers.
The study was published in the American Journal of Preventive Medicine.
Participants were questioned about their exposure to smoking throughout their lives, and then their health was tracked over the next 22 years.
- Source: BBC News