TREATMENT OF TOBACCO USE: EVIDENCE AND POLICY Nancy Rigotti, MD Director, Tobacco Research &...
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![Page 1: TREATMENT OF TOBACCO USE: EVIDENCE AND POLICY Nancy Rigotti, MD Director, Tobacco Research & Treatment Center Massachusetts General Hospital Professor.](https://reader035.fdocuments.in/reader035/viewer/2022062516/56649e4f5503460f94b468b3/html5/thumbnails/1.jpg)
TREATMENT OF TOBACCO USE:
EVIDENCE AND POLICY
Nancy Rigotti, MD
Director, Tobacco Research & Treatment Center
Massachusetts General Hospital
Professor of Medicine, Harvard Medical School
Boston, MA, USA
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OVERVIEW
Tobacco use in perspective
What treatments are effective?
Role of tobacco treatment in global tobacco control (Why treatment matters)
What is the current status of treatment delivery worldwide?
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TOBACCO USE IN PERSPECTIVE
#1 preventable cause of death in the world
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TOBACCO USE IN PERSPECTIVE
#1 preventable cause of death in the world
5.4 million deaths per year worldwide (1 in 10 deaths)
If present trends continue…
> 8 million deaths per year by 2030
> 80% of deaths will be in developing countries
1 billion deaths in the 21st century (vs 100 million in the 20th century)
WHO, MPOWER Report, 2008
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CAUSES OF DEATH ATTRIBUTABLE TO SMOKING – U.S.A.
Other cancer8%
Other diagnoses19%
Chronic lung disease
21%Stroke
4%
Coronary heart disease
20%
Lung cancer28%
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HEALTH CONSEQUENCES OF TOBACCO Special issues for developing countries
Tuberculosis
Exposure → Infection → Disease → Death
risk of infection, if exposed (RR=1.7)1
risk of developing disease, if infected (RR=1.5)1
risk of dying of tuberculosis (RR 3.0 female, 2.3 male)2
India: TB is the leading cause of tobacco-related death 2
Cost of tobacco contributes to poverty, hunger, illness
1 Bates MN et al. Arch Intern Med 2007:167:335. 2 Jha P et al. NEJM 2008;358:1137
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TOBACCO USE IN PERSPECTIVE
#1 preventable cause of death in the world
Cessation reduces health risks
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Doll, R. et al. BMJ 2004;328:1519
Effects of stopping smoking on survival
of British doctors50 year follow-up
at age 25-34 (effect from age 35),
at age 35-44 (effect from age 40),
at age 45-54 (effect from age 50),
at age 55-64 (effect from age 60)
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IS IT EVER TOO LATE TO BENEFIT FROM QUITTING?
Over age 65?
After chronic disease develops?
After MI, quitters lower CV mortality by 36%
With COPD, quitters slow decline in FEV1
Smokers have a poorer response to chemotherapy
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TOBACCO USE IN PERSPECTIVE
Many people use tobacco
#1 preventable cause of death in the world
Cessation reduces health risks – even after chronic disease develops
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PREVALENCE OF TOBACCO USE
1.3 billion people use tobacco
Tobacco use is growing worldwide
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PREVALENCE OF TOBACCO USE
1.3 billion people use tobacco
Tobacco use is growing worldwide
Decreasing in much of the Decreasing in much of the developeddeveloped world world
35% of males, 22% of females use tobacco35% of males, 22% of females use tobacco
Increasing in much of the Increasing in much of the developingdeveloping world world
50% of males, 9% of females use tobacco50% of males, 9% of females use tobacco
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TOBACCO USE IS MORE THAN CIGARETTE SMOKING
• Waterpipe
• Hookah• Narghile• Shisha pipe
Perceived to be safer thansmoking cigarettes
More acceptable for women
• Clove cigarettes• Bidi• Kretek
• Smokeless tobacco
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TOBACCO USE IN PERSPECTIVE
Many people use tobacco
#1 preventable cause of death in the world
Cessation reduces health risks
A global epidemic that requires action
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The shift of the tobacco epidemic to the The shift of the tobacco epidemic to the developing world will lead to unprecedented developing world will lead to unprecedented disease and early death in countries wheredisease and early death in countries where
• Population growth is highestPopulation growth is highest
• Potential for increased tobacco use is highestPotential for increased tobacco use is highest
• Health-care services are least availableHealth-care services are least available
Secretariat’s Report on FCTC Article 14, Secretariat’s Report on FCTC Article 14, 20082008
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OVERVIEW
Tobacco use in perspective
What treatments are effective?
Role of tobacco treatment in global tobacco control (Why treatment matters)
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QUITTING IN PERSPECTIVEU.S. data
40% of smokers try to quit each year
70% of current smokers want to quit
Few succeed long-term (quit for 1 year)
5% quit without help
30% quit with best treatment
Only 25% of those trying to quit seek help
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WHY DO SMOKERS KEEP SMOKING?
Pharmacologic nicotine dependence
DOPAMINE
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WHY DO SMOKERS KEEP SMOKING?
Irritability, anger, impatience Restlessness Difficulty concentrating Insomnia Anxiety Depressed mood Increased appetite
Pharmacologic nicotine dependence → Craving (nicotine “hunger”)
→ Nicotine withdrawal symptoms
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WHY DO SMOKERS KEEP SMOKING?
Pharmacologic nicotine dependence
Psychological factors
• Cues (meals, alcohol, other smokers)
• Coping with stress, emotions (anger)
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WHY DO SMOKERS KEEP SMOKING?
Pharmacologic nicotine dependence
Psychological factors
Psychiatric co-morbidity
• Depression
• Schizophrenia
• Substance abuse
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THE CHALLENGE FOR TREATMENT
We have effective treatments, but…
We need better treatments
We need to deliver the treatments we have to more of the smokers who need them
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THE CHALLENGE FOR TREATMENT
We have effective treatments, but…
We need better treatments
We need to deliver the treatments we have to more of the smokers who need them
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CAVEAT
The evidence about treatment comes largely from studies in high-income countries
Few trials have been done in middle- or low-income countries
Less awareness of health risks Fewer have tried to quit and failed
Biology is relatively constant
Cultural context varies across countries
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SMOKING CESSATION METHODS2008 US Public Health Service Guidelines
Effective treatments
More is better but brief intervention works
Treating tobacco is highly cost-effective
Counseling (individual / group / telephone)
Pharmacotherapy
Combination - better than either one alone
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PHARMACOTHERAPY1st Line - 2008 US Public Health Service Guidelines
Nicotine replacement OR Skin patch 1.9
Gum 1.5
Oral inhaler 2.1
Nasal spray 2.3
Lozenge 2.0
Bupropion SR (Zyban,Wellbutrin SR) 2.0
Varenicline (Chantix/Champix) 3.1
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0
2
4
6
8
10
12
14
16
18
0 10 20 30 40 50 60 70 80 90 100 110 120
Time post administration (min)
Pla
sma
nico
tine
leve
l (ng
/mL) Cigarette (1-2 mg)
Nasal spray (1 mg)
Gum (4 mg)
Patch (21 mg)
PLASMA NICOTINE LEVELSCigarettes vs. Nicotine Replacement Products
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NICOTINE REPLACEMENT
Long-acting, slow onset → skin patch
Short-acting Intermediate onset → oral (gum, lozenge, inhaler)
More rapid onset → nasal (spray)
Constant nicotine level to avoid withdrawal Simplest to use, best compliance User has no control of dose
User controls dose Nicotine blood levels fluctuate more Requires more training to use properly
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New Ways to Use Older Drugs
NICOTINE REPLACEMENT(Supported by evidence and USPHS*)
*Combine short- and long-acting forms“Patch plus” regimen
*Use higher patch doses
*Extend treatment to prevent relapse
Start patch 2 weeks before quit day
“Reduce to quit” (gradual reduction)
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BUPROPION SR (Zyban, Wellbutrin SR)
Doubles cessation rate independent of its antidepressant effect
Reduces post-cessation weight gain
Quit rates higher if add counseling
Reduces seizure threshold (risk: 1/1000)
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VARENICLINE
Binds selectively to the α4β2 nicotinic receptor, which mediates nicotine dependence
Dual mechanism of action
Partial agonist Stimulates receptor to treat craving, withdrawal
AntagonistPrevents nicotine from binding to the receptor →Blocks reward, reinforcement of smoking
NH
N
N
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4-Week Continuous Quit Rates Wks 9–12 (End of drug treatment)
CO-Confirmed
OR=3.85OR=3.85**
(95% CI 2.70, 5.50)
OR=1.93OR=1.93**
(95% CI 1.40, 2.68)
OR=3.85OR=3.85**
(95% CI 2.69, 5.50)
OR=1.90OR=1.90**
(95% CI 1.38, 2.62)
100
44 44
3030
1818
0
20
40
60
Study I Study II
Res
po
nse
Rat
e (%
)
Varenicline Bupropion Placebo
N=352 N=329 N=344 N=344 N=342 N=341
*p<0.0001
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Continuous Abstinence Rates through 1 Year (Weeks 9-52)
CO-Confirmed
OR=3.09OR=3.09 (95% CI 1.95, 4.91) p<0.001
OR=1.46OR=1.46(95% CI 0.99, 2.17) p=0.057
OR=2.66OR=2.66 (95% CI 1.72, 4.11) p<0.001
OR=1.77OR=1.77 (95% CI 1.19,2.63) p=0.004
22 23
1516
108
0
20
40
Study I Study II
Res
po
nse
Rat
e (%
)
100
Varenicline Bupropion Placebo
N=352 N=329 N=344 N=344 N=342 N=341
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VARENICLINE vs. NICOTINE PATCHOpen label randomized controlled trial
(5 countries, n= 746)
0
10
20
30
40
50
60
Weeks 9-12 Weeks 9-52
Varenicline NRT
Aubin HJ. Thorax 2008
End of treatmentOR 1.70 (1.26-2.28)
Continuous abstinenceOR 1.40 (0.99-1.99)
2620
56
43
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VARENICLINE (Chantix, Champix)Entered U.S. market in 2006
What we don’t know Efficacy without regular behavioral support
Efficacy, tolerability in a broader spectrum of smokers than in the clinical trials - Being tested now in CVD, COPD patients
Very rare side effects?
- Depression, suidicality, abnormal behavior
Efficacy combined with NRT, bupropion
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THE CHALLENGE FOR TREATMENT
We have effective treatments, but…
We need better treatments
We need to deliver the treatments we have to more of the smokers who need them
![Page 37: TREATMENT OF TOBACCO USE: EVIDENCE AND POLICY Nancy Rigotti, MD Director, Tobacco Research & Treatment Center Massachusetts General Hospital Professor.](https://reader035.fdocuments.in/reader035/viewer/2022062516/56649e4f5503460f94b468b3/html5/thumbnails/37.jpg)
POTENTIAL FUTURE TREATMENTS
Nicotine vaccine
Cytisine Used in Eastern Europe; no good efficacy data yet
RCT in progress in Poland
A cheaper alternative to varenicline?
Rationale: keep nicotine out of the brain Indication: cessation or relapse prevention? Status: several vaccines in clinical trials
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THE CHALLENGE FOR TREATMENT
We have effective treatments, but…
We need better treatments
We need to deliver the treatments we have to more of the smokers who need them
![Page 39: TREATMENT OF TOBACCO USE: EVIDENCE AND POLICY Nancy Rigotti, MD Director, Tobacco Research & Treatment Center Massachusetts General Hospital Professor.](https://reader035.fdocuments.in/reader035/viewer/2022062516/56649e4f5503460f94b468b3/html5/thumbnails/39.jpg)
POPULATION IMPACT OF ANY TREATMENT
IMPACT = EFFICACY x REACH
Efficacy = % of those treated who benefit
Reach = % of population who get treatment
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SITES FOR DELIVERING CESSATION EDUCATION AND TREATMENT
Health care system
Work site
Schools
Sports programs
Religious settings
Military
Other community-based settings
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SITES FOR DELIVERING TOBACCO TREATMENT
Health care system
Primary care (adults, children)
Prenatal/obstetric care
Hospital, emergency room
Pre-operative care
TB, HIV treatment delivery programs
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PHYSICIAN INTERVENTION
Routine advice to quit is effective Odds of quitting by 66% (vs no advice) *
Brief counseling is more effective Odds of quitting by 37% (vs brief advice) *
Brief intervention by other clinicians is effective
*
Cochrane reviews
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TOBACCO USE TOBACCO USE BY HEALTH PROFESSIONALSBY HEALTH PROFESSIONALS
• A problem in many countriesA problem in many countries
• Health professionals act as role modelsHealth professionals act as role models
• Clinicians who smoke are less likely to Clinicians who smoke are less likely to counsel patientscounsel patients
• Treatment strategies must include Treatment strategies must include cessation programs for health care cessation programs for health care professionals and studentsprofessionals and students
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5A BRIEF COUNSELING MODEL2000 U.S. Public Health Service Guidelines
ASK all patients about smoking
ADVISE all smokers to quit
ASSESS smoker’s readiness to
quit
ASSIST smokers to quit
ARRANGE follow-up care
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PROBLEM
Few physicians follow the full guideline
Physicians say…
“I don’t have the time”
“I don’t know how”
“Treatment does not work or is not covered”
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5A BRIEF COUNSELING MODEL2000 U.S. Public Health Service Guidelines
ASK
ADVISE Core physician role
ASSESS
ASSIST
ARRANGE
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5A BRIEF COUNSELING MODEL2000 U.S. Public Health Service Guidelines
ASK Done by office staff (‘vital sign’)
ADVISE Core physician role
ASSESS
ASSIST
ARRANGE
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5A BRIEF COUNSELING MODEL2000 U.S. Public Health Service Guidelines
ASK Done by office staff
ADVISE Core physician role
ASSESS
ASSIST Refer to community
resources
ARRANGE (clinics, quit lines, etc.)
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TELEPHONE QUITLINESDelivering counseling proactively by phone
Convenient
Private Free (paid for by government or health plans)
Effective (pooled OR 1.4, 95% CI 1.3-1.6)*
Offered by states, now a national access number (1-800-QUIT-NOW)
*Stead LF et al. Tobacco Control 2007;16(suppl 1):i3
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QUITWORKS
Referral formfaxed to Quitline
Quitline calls smoker to offer free counseling
QuitWorks gives MD feedback on patient progress
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ABC’sNew Zealand Clinical Guidelines, 2007
ASK all patients about smoking
BRIEF ADVICE to quit
CESSATION SUPPORT
• Prescribe medication
• Connect to counseling support
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OVERVIEW
Tobacco use in perspective
What treatments are effective?
Role of tobacco treatment in global tobacco control (Why treatment matters)
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World Health Organization World Health Organization Framework Convention on Framework Convention on Tobacco Control (FCTC)Tobacco Control (FCTC)
Article 14 obliges countries toArticle 14 obliges countries to
• develop evidence-based treatment develop evidence-based treatment guidelines guidelines
• take effective measures to promote take effective measures to promote adequate treatment for tobacco adequate treatment for tobacco dependencedependence
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World Health Organization World Health Organization Framework Convention on Framework Convention on Tobacco Control (FCTC)Tobacco Control (FCTC)
Article 14 Article 14 asks countries to try toasks countries to try to• Implement programs to promote cessation in Implement programs to promote cessation in
multiple settings multiple settings (schools, workplaces, health care, sports)(schools, workplaces, health care, sports)
• Implement diagnosis and treatment of tobacco Implement diagnosis and treatment of tobacco dependence in national health, education programsdependence in national health, education programs
• Establish treatment and prevention programs in Establish treatment and prevention programs in health care and rehabilitation facilitieshealth care and rehabilitation facilities
• Facilitate access and availability to treatmentFacilitate access and availability to treatment
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World Health Organization World Health Organization Framework Convention on Framework Convention on Tobacco Control (FCTC)Tobacco Control (FCTC)
There is an interaction between Article 14 There is an interaction between Article 14 and other FCTC Articlesand other FCTC Articles
• Implementation of other articles will encourage Implementation of other articles will encourage quittingquitting
• Implementation of Article 14 will increase support Implementation of Article 14 will increase support for other Articlesfor other Articles
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Implementation of other articles in the FCTC will encourage quitting
Article 6 Price and tax measures to reduce demand for tobacco
Article 8 Protection from exposure to tobacco smoke
Article 11 More prominent and pictorial warnings
Article 13 Reduce availability of tobacco advertising and marketing
Article 20 Research, surveillance and exchange of information
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Implementation of FCTC Article 14 could increase support for the adoption of other articles
Article 6 Price and tax measures to reduce demand for tobacco
Article 8 Protection from exposure to tobacco smoke
Article 11 More prominent and pictorial warnings
Article 13 Reduce availability of tobacco advertising and marketing
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World Health Organization World Health Organization Framework Convention on Framework Convention on Tobacco Control (FCTC)Tobacco Control (FCTC)
• ImplementationImplementation of FCTC policies will be facilitated of FCTC policies will be facilitated by the availability of treatment servicesby the availability of treatment services
Tobacco taxesTobacco taxes
Smoke-free policiesSmoke-free policies
• Is it Is it ethical ethical to increase tobacco price and restrict to increase tobacco price and restrict use without providing access to treatment, especially use without providing access to treatment, especially price increases for the poor? price increases for the poor?
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MPOWER ReportWorld Health Organization – 2008
M onitor tobacco use and tobacco control policy
P rotect people from tobacco smoke
O ffer help to quit tobacco use
W arn about the dangers of tobacco
E nforce bans on tobacco advertising, promotion
R aise taxes on tobacco
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WHY TREATMENT MATTERS
Tobacco use is growing epidemic
Stopping tobacco use reduces health risks
Tobacco prevention by itself works slowly
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CESSATON vs. PREVENTION
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WHY TREATMENT MATTERS
Tobacco use is growing epidemic
Stopping tobacco use reduces health risks
Tobacco prevention by itself works slowly
Tobacco use is an addictive disorder
Tobacco treatment aids tobacco control policies overall (and vice versa)
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CONCLUSIONS
Cessation is necessary to stop the global tobacco epidemic
Tobacco treatment is needed because of the addictive nature of tobacco use
Effective tobacco treatment exists
Reach and access to cost-effective treatment is the major challenges
Tobacco treatment is an necessary component of comprehensive tobacco control programs