Showing posts with label cigar smoking. Show all posts
Showing posts with label cigar smoking. Show all posts

Friday, February 26, 2021

New Research Confirms Minimal Mortality Risks with Exclusive Cigar Use

 

Last year my colleague Nantaporn Plurphanswat and I published a study in the Harm Reduction Journal on causes of death among U.S. male smokeless tobacco (ST) users.  We showed that exclusive ST users do not have significantly elevated mortality from any smoking-related diseases, although younger ST users had elevated deaths from all other causes. 

While conducting that research, I testified (see here and here) at a field hearing convened by U.S. Senator Marco Rubio, then-chairman of the Senate Committee on Small Business & Entrepreneurship.  The hearing focused on proposed FDA regulations’ likely effect on premium cigar production and marketing. 

Subsequently, Dr. Plurphanswat and I conducted a cigar use mortality study.  Our report has just been published in the Harm Reduction Journal.  Our main finding:

“exclusive male cigar smokers age 40 + years had no statistically significant increased mortality from all causes, heart diseases, malignant neoplasms, cerebrovascular disease, smoking-related diseases or other causes. In contrast, the mortality experience of dual users of cigars and cigarettes and cigar smokers who formerly used cigarettes is similar to exclusive cigarette smokers.”

As with our ST study, our analysis of cigar users included only men age 40+ years, because it was designed to maximize the chance of producing significant results.  Many previous studies included women, who rarely smoke cigars, and young men, among whom death is rare; those groups do not produce relevant information.  Consider: Researchers aiming to measure breast cancer rates will likely not count men because while breast cancer does affect males, it occurs at such a minuscule rate that it would cut the rate among women in half, painting a grossly inaccurate picture.

Cigars are a complicated tobacco category, as we noted in our article:

“The cigar category consists mainly of two types of products: traditional, regular or premium cigars and cigarillos and little filtered cigars. The first type is larger and contains tightly rolled tobacco wrapped in a tobacco leaf. The second category has been described by the National Health Interview Survey questionnaires since 2015: ‘Cigarillos are medium cigars that sometimes are sold with plastic or wooden tips’ and ‘sold individually or in packs of 5 or fewer. Little filtered cigars look like cigarettes and are usually brown in color. Like cigarettes, little filtered cigars have a spongy filter and are sold in packs of 20.’ [reference here]  These differences are important. It has been known for decades that exclusive users of traditional cigars and pipes tend to puff, not inhale, the smoke, thus limiting systemic exposure to toxic constituents compared with cigarette smoking…In contrast, users of cigarillos and small cigars generally inhale the smoke. These cigar types are more commonly consumed by adults under age 40 who are less educated and lower income than regular cigar smokers. They are also more likely to be consumed daily, in larger numbers, and also concurrently with cigarettes.”

However, National Health Interview Surveys (NHIS) data that we used to conduct our study does not distinguish between smokers of premium cigars and those who smoke products in the second category.  The following figure from our HRJ article, which illustrates the hazard ratios (HRs, similar to relative risks) for cigar users, shows how we tried to overcome the NHIS deficiency.  We coupled current, former and never cigar users with the same groupings of cigarette smokers.  Cigar smokers in the red circles are likely to be in the cigarillos/little cigar group, whereas those in the green circle – who never smoked cigarettes – are likely to be premium users.

To be clear, neither puffing nor inhaling the smoke of burning tobacco is a healthy activity, but federal officials and others misrepresent the complex category when they make sweeping statements about how cigar smoking carries many of the same health risks as cigarette smoking.

All tobacco consumers deserve truthful information and guidance.  The sweeping FDA indictment ignores scientific evidence and misleads cigar smokers.  The following facts are indisputable: (1) In the U.S., the prevalence of cigar use, especially premium cigars, is very low; (2) premium products are used infrequently and in small numbers; and (3) they are puffed, not inhaled.  Low prevalence, infrequent use and reduced exposure translates into minimal harm at the population level.

Conflation of cigarette smoking with dip and chew, vaping, cigar and pipe smoking falsely informs consumers that all tobacco products are equally dangerous.  When Congress gave the FDA regulation of tobacco products 10 years ago, it did not direct the agency to treat all tobacco products as equally hazardous.  Unfortunately, the FDA’s regulatory actions have done just that. The FDA’s current posture wastes government resources, undermines public health, and does nothing to address the 500,000 annual deaths caused by cigarette smoking.

 


Thursday, April 11, 2019

Premium Cigars Threatened by Pending FDA Regulations, with Negligible Public Health Benefit


Chairman Marco Rubio convened a field hearing of the Senate Committee on Small Business & Entrepreneurship on April 5 in Tampa, Florida.  The focus was on proposed FDA regulations’ likely effect on premium cigar production and marketing.  I was invited to testify on the health effects of cigar smoking.  In addition to submitting formal testimony, available here, I made the following remarks at the hearing.

As an oral pathologist at a major cancer center 25 years ago, I discovered that Americans, including doctors, are grossly misinformed about the high health risks of cigarettes versus the vastly lower risks of dip and chew.  This launched my tobacco research program that has produced 70 publications in the peer-reviewed medical literature.

My research established that smokeless tobacco use is 98% less hazardous than smoking, and that extends to the risk for mouth cancer.   This was confirmed by a large recent study from federal and federally-funded investigators; they found that men who dipped or chewed tobacco had no excess risk for mouth cancer. Zero.
 
Differences in health effects are also well documented for combustible products.  First, some basic principles.  When you burn tobacco, you release nicotine and about 7,000 other chemicals.  Twenty to 30 years of 10 deep puffs on 20 to 30 cigarettes per day builds high risks for cancers, circulatory diseases and emphysema… leading to a high death toll. 

Cigars also involve burning tobacco, but patterns of use are completely different.  The FDA knows that the cigar category encompasses a wide spectrum of products.  On one end are premium cigars; the rest of the category largely consists of machine-made, mass-produced cigarillos, little cigars and filtered cigars. I will reference the latter group as “little cigars”.  In 2014 FDA staff estimated that less than one percent of Americans smoked premium cigars; most light up infrequently.  Consumers of little cigars smoke a lot more often, and they also tend to smoke cigarettes.

Premium cigar smokers fit another FDA label, primary (they never smoked cigarettes), as opposed to former smokers and dual users of both products.  This is important because adding cigarettes adds risk. 

In my submitted testimony I present detailed information from a published FDA analysis of 22 epidemiologic studies of the causes of death among cigar smokers, most of whom are men.   

The FDA study listed many diseases associated with cigarette smoking; the biggest killers are cancers, heart diseases, strokes and emphysema.  Consumption of one or two cigars per day was not associated with significantly increased deaths from any of these. 

To be clear, puffing or inhaling the smoke of burning tobacco is not a healthy activity.  But the FDA researchers misstated the facts when they concluded that “…cigar smoking carries many of the same health risks as cigarette smoking.”

All tobacco consumers deserve truthful information and guidance.  The sweeping FDA indictment ignores scientific evidence and misleads cigar smokers.  The following facts are indisputable: (1) in the U.S. the prevalence of cigar use, especially premium cigars, is very low; (2) premium products are used infrequently and in small numbers; and (3) they are puffed, not inhaled.  Low prevalence, infrequent use and reduced exposure translates into minimal harm at the population level. 

Conflation of cigarette smoking with dip and chew, vaping, cigar and pipe smoking falsely informs consumers that all tobacco products are equally dangerous.  When Congress gave the FDA regulation of tobacco products 10 years ago, it did not direct the agency to treat all tobacco products as equally hazardous.  Unfortunately, the FDA’s regulatory actions have done just that. The FDA’s current posture wastes government resources, undermines public health and does nothing to address the 500,000 annual deaths caused by cigarette smoking.



Thursday, September 1, 2016

FDA Cigar Study Part II: Heart & Lung Disease Nearly Zero for 1-2 Cigars Per Day



As noted in my last blog post (here), data presented in a recent FDA review of cigar health risks (here) showed that smoking up to two cigars per day, while not completely safe, is neither associated with significantly increased risks for death from all causes, nor smoking-related cancers.       

Now we examine the FDA data regarding cigar-related circulatory and lung diseases. Here are the overall results:











Table 1. Relative Risks for Mortality From Circulatory Diseases and Emphysema Among Men Who Smoke Cigars
DiseaseStudy, YearRelative Risk (95% CI)


Coronary heart diseaseKahn, 19661.04 (0.96 – 1.13)

Carstensen, 19871.16 (0.84 – 1.57)

Ben-Schlomo, 19940.45 (0.17 – 1.22)

Shanks, 19981.05 (1.00 – 1.11)

Jacobs, 19991.30 (1.05 – 1.62) 1

Jacobs, 19990.93 (0.72 – 1.21) 2


StrokeKahn, 19661.08 (0.91 – 1.28)

Shanks, 19980.96 (0.87 – 1.06)


Aortic AneurysmKahn, 19662.06 (1.32 – 3.07)

Carstensen, 19875.10 (1.33 – 13.19)

Shanks, 19981.76 (1.29 – 2.35)


AtherosclerosisKahn, 19660.97 (0.69 – 1.33)


EmphysemaKahn, 19660.79 (0.25 – 1.86)

Carstensen, 19871.30 (0.00 – 7.45)

Lange, 19923.70 (1.10 – 12.00)

Shanks, 19981.42 (0.96 – 2.03)


1Age 30-74 years
2Age 75+ years
    

Compared with never smokers, cigar smokers in most studies had no elevated risks for coronary heart disease, which is one of the most common smoking-related causes of death in the U.S.; the single exception was a subgroup of men, age 30-74 years, in the Jacobs study.  Cigar smokers also did not have increased risks for two other frequent causes of death, stroke and atherosclerosis (hardening of the arteries).

Aortic aneurysm – a bulge in the heart’s main artery – is the only disease risk that is consistently elevated in cigar smokers.  It is a serious disorder but a distinctly uncommon cause of death; the mortality rate due to aortic aneurysm among those 45 and older dropped precipitously from 16 deaths per 100,000 in 2000 to 7.4 in 2014.

For men who smoke only one or two cigars a day, the health risks are even lower.


Table 2. Relative Risks for Mortality From Circulatory Diseases and Emphysema Among Men Who Smoke 1 or 2 Cigars Per Day
DiseaseShanks, 1998Other Studies


Coronary heart disease0.98 (0.91 – 1.07)1.00 (0.90 – 1.10)1


1.18 (0.76 – 1.82)2


Stroke1.01 (0.88 – 1.17)


Aortic Aneurysm1.82 (1.11 – 2.81)


Emphysema1.39 (0.74 – 2.38)


1Kahn 1966, fewer than 5 cigars per day.
2Jacobs 1999, 1 cigar per day.


No elevated risks for coronary heart disease, stroke or emphysema among men smoking 1-2 cigars per day.  The only disease that was significantly elevated was aortic aneurysm.

The Take-Home Message for Cigar Smokers

Puffing and/or inhaling the smoke of burning tobacco is not without risks.

The FDA, which now regulates tobacco products, seems inclined to treat cigars the same as cigarettes.  FDA staff wrote in their cigar study that “…cigar smoking carries many of the same health risks as cigarette smoking…We have observed that some risks associated with cigar smoking can be as high or higher than those associated with cigarette smoking, especially at the highest doses and levels of inhalation for cigar smoking.”

The problem with such a sweeping indictment is that it ignores scientific evidence and misleads cigar smokers who could substantially benefit from truthful harm reduction guidance.

Like any risky behavior, the degree of risk is proportional to dose and duration of exposure.  In other words, risk is based on frequency of cigar smoking and the degree to which smoke is puffed and/or inhaled.