Parents who smoke around their young children more than triple their kids’ risk of getting cancer later in life, a new study concludes.

Forbes reported Jan. 28 that the study found that children exposed to their parents secondhand smoke on a daily basis also have an elevated risk of developing other respiratory problems compared to kids growing up in a smoke-free home. The study looked at 123,000 people in 10 European nations, tracking them for an average of seven years.

Cancer risk was highest among former smokers, as opposed to those who never smoked. Researchers suggested that cumulative exposure to cigarette smoke – regardless of the source – raised the risk of getting cancer.