Smoking a cigarette immediately after waking up in the morning may increase the risk of developing lung or oral cancer, a new study has warned. This finding is critical in Kerala, where 58.6% of daily tobacco users in Kerala consume tobacco within half an hour of waking up, according to the Global Adult Tobacco Survey (2009-10).
The study found that smokers who consume cigarettes immediately after waking have higher levels of NNAL — a metabolite of the tobacco specific carcinogen NNK — in their blood than smokers who refrain from smoking a half hour or more after waking , regardless of the number of cigarettes smoked per day.
The study was conducted by said Steven Branstetter, assistant professor of biobehavioural health in Pennsylvania State University, and his colleague Joshua Muscat, professor of public health sciences. The researchers examined data on 1,945 smoking adult participants from the National Health and Nutrition Examination Survey who had provided urine samples for analysis of NNAL. These participants also had provided information about their smoking behaviour, including how soon they typically smoked after waking. researchers.
The researchers found that around 32% of the participants they examined smoked their first cigarette of the day within 5 minutes of waking; 31% smoked within 6 to 30 minutes of waking; 18% smoked within 31 to 60 minutes of waking; and 19% smoked more than one hour after waking.
According to Branstetter, other research has shown that NNK induces lung tumours in several rodent species. Levels of NNAL in the blood can therefore predict lung cancer risk in rodents as well as in humans. In addition, NNAL levels are stable in smokers over time, and a single measurement can accurately reflect an individual's exposure.
In addition, the researchers found that the NNAL level in the participants' blood was correlated with the participants' age, the age they started smoking and their gender.
Branstetter said, "Most importantly, we found that NNAL level was highest among people who smoked the soonest upon waking, regardless of the frequency of smoking and other factors that predict NNAL concentrations. People who smoke sooner after waking inhale more deeply and more thoroughly, which could explain the higher levels of NNAL in their blood."
Source: Times of India
The study found that smokers who consume cigarettes immediately after waking have higher levels of NNAL — a metabolite of the tobacco specific carcinogen NNK — in their blood than smokers who refrain from smoking a half hour or more after waking , regardless of the number of cigarettes smoked per day.
The study was conducted by said Steven Branstetter, assistant professor of biobehavioural health in Pennsylvania State University, and his colleague Joshua Muscat, professor of public health sciences. The researchers examined data on 1,945 smoking adult participants from the National Health and Nutrition Examination Survey who had provided urine samples for analysis of NNAL. These participants also had provided information about their smoking behaviour, including how soon they typically smoked after waking. researchers.
The researchers found that around 32% of the participants they examined smoked their first cigarette of the day within 5 minutes of waking; 31% smoked within 6 to 30 minutes of waking; 18% smoked within 31 to 60 minutes of waking; and 19% smoked more than one hour after waking.
According to Branstetter, other research has shown that NNK induces lung tumours in several rodent species. Levels of NNAL in the blood can therefore predict lung cancer risk in rodents as well as in humans. In addition, NNAL levels are stable in smokers over time, and a single measurement can accurately reflect an individual's exposure.
In addition, the researchers found that the NNAL level in the participants' blood was correlated with the participants' age, the age they started smoking and their gender.
Branstetter said, "Most importantly, we found that NNAL level was highest among people who smoked the soonest upon waking, regardless of the frequency of smoking and other factors that predict NNAL concentrations. People who smoke sooner after waking inhale more deeply and more thoroughly, which could explain the higher levels of NNAL in their blood."
Source: Times of India
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