Secondhand Smoke Exposure

People who are exposed to secondhand smoke may be more likely to have cognitive impairments than their peers, discount cigarettes smokers, a new study showed.
This study doesn’t prove that secondhand smoke exposure causes cognitive impairment, but it does show that cognitive impairment was more common among nonsmokers and former smokers with high levels of cotinine, a nicotine-related chemical, in their saliva samples.
The study included 4,809 adults of 50 year-old and older from England. They provided saliva samples and took various tests of mental skills, including memory and attention, between 1998 and 2002. Participants were considered cognitively impaired if their overall test score was in the bottom 10% of the group.
Never smokers with the highest salivary levels of cotinine were 70% more likely to be cognitively worsen than never smokers with the lowest salivary levels of cotinine. Former smokers with the highest salivary cotinine levels were 32% more likely to have cognitive impairment than former smokers with the lowest salivary cotinine levels.
Researchers found that not only secondhand smoke can cause cognitive impairment but also age, sex, education, diabetes, high blood pressure, and heart disease play a very important role in cognitive decline.
This study raises the strong possibility that secondhand smoke causes cognitive decline, but further research is needed to establish a causal effect.
Source: Ourcigarettesnews ®

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