Ive been trying to wrap my head around the claims being made in the media about e-cigarettes.
The ones that bother me the most are:
Ill ignore the specific problems I have with these claims (for the moment), but I want to get some feedback from people here on the relationship between risk and possible population level outcomes.
What Id really like is some feedback on my math and my logic here. So apologies at the outset, and thanks for taking to the time to read this rather long post. Heres what Ive been thinking
There are approximately 30,000,000 Canadians aged 15 and over. Roughly 20% of this population smokes cigarettes. That means there are currently 6,000,000 cigarette smokers in Canada.
Were told that half of all smokers will die of smoking related diseases. If thats true, then we can expect 3,000,000 of these smokers to die as a result of their tobacco use.
So lets play the e-cigarette simulation game and see what effect e-cigarette use could have on that number.
First, we need to know how much less risky e-cigarettes are than tobacco cigarettes. Lots of debate out there, and many say 99% safer, plus or minus 1%. But lets be conservative and say they are just 90% safer.
If you switch from tobacco to e-cigs, your risk of death goes from 50% to 5% (.5 * .1 = .05). [I know, if you smoked for 40 years then switched, you might still die of smoking related disease and we can play with the how much safer number, but please, stay with me here for a minute.]
Now, lets imagine what would happen to the death rate if a some percentage of smokers switched to e-cigarettes.
If nobody switches to e-cigs, we can expect 3,000,000 deaths (one half of users).
But if 25% of current tobacco users (1,500,000 smokers) switched to e-cigs, heres what happens.
Of the remaining 4,500,000 smokers, we can expect 2,250,000 to die.
Of the 1,500,000 people who switch, we can expect 5% or 75,000 to die. Thats 675,000 fewer deaths (a total of 2,325,000 deaths).
But wait! What if non-smokers take up e-cigarettes? How many people who dont smoke would it take to get the total number of deaths back up to 3,000,000?
In fact, to get back to 3,000,000 deaths, you would need 13,500,000 non-smokers to start using e-cigs (or 56% of the remaining population). That would leave just 4,500,000 not smoking cigarettes or using electronic cigarettes. Can we lure more than half of the currently non-smoking Canadian population into using e-cigarettes through sexy advertising and candy flavours? I dont think so.
But wait! What about the gateway argument the idea that non-smoking kids (or adults) will start using a supposedly safe e-cigarette, get addicted to nicotine, and then switch to tobacco cigarettes?
If we want to get back to 3,000,000 deaths, wed need 1,350,000 young people to somehow start using e-cigarettes, then switch to tobacco cigarettes. [And there is no evidence that this is happening, but dont get me started, and again, please stay with me here.]
But there are only 2,100,000 Canadians aged 15-19. And we know that 12% (or 252,000) of those young people already smoke tobacco cigarettes. So wed need 85% of the 1.8 million young people who currently dont smoke, to start using an e-cig and then switch to tobacco cigarettes to get us back to 3,000,000 deaths.
Is that even within the realm of possibility? I dont think so. Are you worried that 85% of all non-smoking youth in Canada will use e-cigs as a gateway drug? Im not.
Again, apologies for the length of this post, but I hope people will check the math for me. We can play with the numbers (use 50% safer and 10% uptake of e-cigs, etc.) but it's still a net health outcome win as far as I can tell
Am I wrong about that? What do number-crunchers out there have to say?
Thanks!
The ones that bother me the most are:
- we dont know whats in them, so dont use them/ban them!
- we dont know the long-term effects, so dont use them/ban them!
- it re-normlizes smoking, so ban them!
- think of the children, ban them!
Ill ignore the specific problems I have with these claims (for the moment), but I want to get some feedback from people here on the relationship between risk and possible population level outcomes.
What Id really like is some feedback on my math and my logic here. So apologies at the outset, and thanks for taking to the time to read this rather long post. Heres what Ive been thinking
There are approximately 30,000,000 Canadians aged 15 and over. Roughly 20% of this population smokes cigarettes. That means there are currently 6,000,000 cigarette smokers in Canada.
Were told that half of all smokers will die of smoking related diseases. If thats true, then we can expect 3,000,000 of these smokers to die as a result of their tobacco use.
So lets play the e-cigarette simulation game and see what effect e-cigarette use could have on that number.
First, we need to know how much less risky e-cigarettes are than tobacco cigarettes. Lots of debate out there, and many say 99% safer, plus or minus 1%. But lets be conservative and say they are just 90% safer.
If you switch from tobacco to e-cigs, your risk of death goes from 50% to 5% (.5 * .1 = .05). [I know, if you smoked for 40 years then switched, you might still die of smoking related disease and we can play with the how much safer number, but please, stay with me here for a minute.]
Now, lets imagine what would happen to the death rate if a some percentage of smokers switched to e-cigarettes.
If nobody switches to e-cigs, we can expect 3,000,000 deaths (one half of users).
But if 25% of current tobacco users (1,500,000 smokers) switched to e-cigs, heres what happens.
Of the remaining 4,500,000 smokers, we can expect 2,250,000 to die.
Of the 1,500,000 people who switch, we can expect 5% or 75,000 to die. Thats 675,000 fewer deaths (a total of 2,325,000 deaths).
But wait! What if non-smokers take up e-cigarettes? How many people who dont smoke would it take to get the total number of deaths back up to 3,000,000?
In fact, to get back to 3,000,000 deaths, you would need 13,500,000 non-smokers to start using e-cigs (or 56% of the remaining population). That would leave just 4,500,000 not smoking cigarettes or using electronic cigarettes. Can we lure more than half of the currently non-smoking Canadian population into using e-cigarettes through sexy advertising and candy flavours? I dont think so.
But wait! What about the gateway argument the idea that non-smoking kids (or adults) will start using a supposedly safe e-cigarette, get addicted to nicotine, and then switch to tobacco cigarettes?
If we want to get back to 3,000,000 deaths, wed need 1,350,000 young people to somehow start using e-cigarettes, then switch to tobacco cigarettes. [And there is no evidence that this is happening, but dont get me started, and again, please stay with me here.]
But there are only 2,100,000 Canadians aged 15-19. And we know that 12% (or 252,000) of those young people already smoke tobacco cigarettes. So wed need 85% of the 1.8 million young people who currently dont smoke, to start using an e-cig and then switch to tobacco cigarettes to get us back to 3,000,000 deaths.
Is that even within the realm of possibility? I dont think so. Are you worried that 85% of all non-smoking youth in Canada will use e-cigs as a gateway drug? Im not.
Again, apologies for the length of this post, but I hope people will check the math for me. We can play with the numbers (use 50% safer and 10% uptake of e-cigs, etc.) but it's still a net health outcome win as far as I can tell
Am I wrong about that? What do number-crunchers out there have to say?
Thanks!