preparing for guidelines in 2013preparing for guidelines in 2013 neil j. stone md, macp, faha, facc,...
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PREPARING FOR GUIDELINES IN 2013
Neil J. Stone MD, MACP, FAHA, FACC, FNLABonow Professor of Medicine Division of CardiologyFeinberg School of MedicineNorthwestern University Chicago Campus
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DisclosuresNo relationships with industry to disclose.
I am chair of the ATP IV panel appointed by NHLBI. The official report is under review.
Views expressed in this talk are my own and not necessarily those of ATP IV.
This is not an official report of ATP IV and should not be reported as such
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Why Guidelines for CVD from atherosclerosis? They are important!
• Atherosclerosis is global
• Costs of managing atherosclerosis are substantial
• Population is growing older – more in the ages where CVD from atherosclerosis is common
• Women get atherosclerosis and those with atherosclerosis benefit as much from statins as men
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Estimated direct and indirect costs (in billions of dollars) of major cardiovascular diseases and stroke – in US. 2010. Source: NHLBI
177.1
73.7 76.6
39.2
0
40
80
120
160
200
Coronary HeartDisease
Stroke HypertensiveDisease
Heart Failure
Bil
lio
ns
of
Do
llar
s
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Prevalence of CVD in adults age 20 and older by age and sex (NHANES 2003-2006). Source: NCHS and NHLBI. These data include coronary heart disease, heart failure, stroke and hypertension.
14.9
39.6
73.6
8.7
78.884.7
39.6
73.1
0102030405060708090
20-39 40-59 60-79 80+
Perc
ent o
f Pop
ulat
ion
Men Women
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Annual rate of first heart attack by age, sex and race.ARIC Surveillance: 1987-2004Source: NHLBI.
02468
10121416
35-44 45-54 55-64 65-74
Per 1
,000
Per
sons
White Men Black Men White Women Black Women
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Guidelines – What We Should ExpectFoundation for Clinical Management
• Authoritative and trustworthy
• Reflect established science
• Inclusive/Transparent
• IOM (Institute of Medicine). Clinical Practice Guidelines We Can Trust. Washington, DC: National Academies Press; 2011
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Guidelines – Challenges A Foundation for Clinical Management
1) Which patients benefit 2) What therapy,3) What age 4) What Rx intensity
B) Keep it Simple
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Guidelines – Challenges Authoritative/Trustworthy:
Deal with bias/conflicts of interest transparently-Diverse panel; appropriate recusal -Focus on RCTs whose value judged by independent
panel -Less emphasis on expert opinion
Reflect established science-Address critical questions; not a lipid primer
Inclusive/Transparent Important for patients, physicians, other stakeholders
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How Have Guidelines Been Doing?
“Fewer than half the guidelines surveyed met more than 50% of the IOM standards”Arch Intern Med. 2012;172(21):1628-1633.
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•
Arch Intern Med. 2012;T. Shaneyfelt
Guideline panel membership is a main determinant of trustworthiness of guidelines
Even more problematic for guideline consumers is determining the role of conflicts of interest (COI)
Majority have no COIChairs have no COI
Those with significant COI do not participate in voting on recommendations but may offer written input so their clinical and research expertise is maintainedA closely related topic if the single subspecialty panel....
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Three Critical Questions• What is the evidence that treatment to LDL-Cholesterol and non HDL-C goals reduces outcomes in atherosclerotic cardiovascular disease in
• Primary Prevention• Secondary Prevention
• What is the evidence for efficacy and safety of each of the 5 lipid drug classes
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Cautions/Benefits of RCTs, systematic reviews and meta-analyses to guide practiceLook for:
-Prospective definition of Inclusion/Exclusion criteria-Individual level meta-analysis
Cautions:-Avoid low quality RCT’s, systematic reviews and meta-analyses
Limitations: • For risk assessment: cohort trials more inclusive• For adverse effects of large effect
–observational often adequate:• By definition, RCTs by their selection, limit generalizability
Look for: -Prospective definition of Inclusion/Exclusion criteria-Individual level meta-analysis
Cautions:-Avoid low quality RCT’s, systematic reviews and meta-analyses
Limitations: • For risk assessment: cohort trials more inclusive• For adverse effects of large effect
–observational often adequate:• By definition, RCTs by their selection, limit generalizability
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Cautions/Benefits of RCTs, systematic reviews and meta-analyses to guide practiceBenefits:
The advantage of inclusion/exclusion criteria for RCTs is that they define clearly
-the population that derives treatment benefit -the proportion that do not tolerate treatment, drop out or experience harms-allow number needed to treat to be compared tonumber needed to harm -assessment if the benefits are worth the risks
Importantly, in the field of ASCVD prevention, a robust database of RCTs has developed that looks at participants over a wide range of LDL-cholesterol, co-morbidities, and cardiovascular severity
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Why use data from RCTs and meta-analyses of RCTS in clinical practice?
What about those who didn’t qualify for these trials?1. Should be a focus of ongoing research investigations
2. Patients need to know what decisions are based on data that is less “solid” so they can participate in shared
decision making
3. Guidelines can help address concerns of “maximizers” and minimizers”** among us**.
4. Can’t assume all “high CVD risk” patients benefit from statins:e.g. Heart failure, hemodialysis, and/or aortic stenosis
_________________________**From Groopman J, Hartzband P. “Your Medical Mind: How to
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Lancet 2005; 366: 1267–78
This
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We undertook meta-analyses of individual participant data from randomized trials involving at least 1000 participants and at least 2 years of treatment duration for more versus less intensive statin regimens
CTT Collaboration: Lancet 2010; 376: 1670-1681
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CTT Collaboration: Lancet 2010; 376: 1670-1681
Further reduction in LDL cholesterol safely produce definite further reductions in the incidence of heart attack, of revascularization and of ischemic stroke with each 38.7 mg/dl (1 mmol/L) reducing reducing the annual rate of these MVE by just over 1/5th
No threshold effect seen within the range studied
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Statins reduce relative risk of major CVD* in Secondary and Primary Prevention
• Major CVD = first occurrence of any major coronary event (nonfatal MI, coronary death) , coronary revascularization, or stroke
• 1 mmol/L = 39 mg/dL
Primary prevention
CTT Collaboration: Lancet 2010; 376: 1670-1681
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CTT Collaboration 2010; 376: 1670-1681
Traits Events (%/yr) RR (CI) per 38.7 mg/dl Heterogeneity/
Statins/more control/less reduction in LDL-c trend test
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High vs. lower dose statin comparative studies in secondary preventionStudy Acute/chronic CAD Intervention/
comparatorPROVE IT Acute atorva 80 vs prava 40TNT Chronic atorva 80 vs atorva 10IDEAL Chronic atorva 80 vs simva 20-40SEARCH Chronic simva 80 vs simva 20A-Z Acute simva 40-80 vs Placebo
then simva 20CTT Collaboration: Lancet 2010; 376: 1670-1681
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Value of RCTs seen in this groupTwo of the trials showed reasons not to use simvastatin 80 mg daily
-Lack of increased efficacy in A-Z-Unacceptable myopathy (rhabdo) incidence in
SEARCHA. SLC01B1 genetic variant in more than 60%B. Drug-drug interactions – e.g. amiodarone
FDA Other cardiac drug-drug: diltiazem, amlodipine, verapamil
deLemos et al JAMA 2004;292:1307-1316 Study of the Eðectiveness of Additional Reductions in Cholesterol and Homocysteine (SEARCH) Collaborative
Group:Lancet 2010; 376: 1658 1669
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More Statin versus less
CTT Collaboration: Lancet 2010; 376: 1670-1681
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Effects on major vascular events per 38.7 mg/dl (1 mmol/L) reduction in LDL-c by baseline LDL-C in less intensive or control rgimen
Baseline LDLc
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Effects on Cause Specific Mortality per 38.7 mg/dl (1 mmol/L) reduction in LDL-C
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Statin Rx Does Not Increase Risk for Cancer
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Address Side-EffectsDiabetes
Muscle Aches and Pains
Cognitive Function
Liver function
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Preiss D, Sattar N. Current Opinion in Lipidology2011:22:460-466
Incident diabetes
Incident CVD
Secondary prevention studies
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Lessons from a primary prevention trial on statins and diabetes• Jupiter clinical trial: 17,603 men/women randomized to rosuvastatin 20 mg vs placebo• Primary prevention (Ridker et al N Engl J Med. 2008;359(21):2195-
2207.)
• Men 50 and older; hs CRP >2• Women 60 and older; hs CRP>2
• Four major risk factors for DM• Metabolic syndrome; BMI 30 or more• impaired fasting glucose, glycated Hb >6%Ridker PM et al. Lancet 2012: 380; 565 – 571
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RCT evidence regarding preventing diabetes with lifestyle changes
• Finnish Diabetes Prevention & DPP Trials• NEJM 2001, 2002
• Populations• Both with adults with impaired glucose tolerance
• Intervention: Lifestyle Change to• Reduce saturated fat• Lose modest amounts of weight• Regular exercise
• Outcomes: Reduced new diabetes by ~60%
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• Muscle problems, not liver problems are the major concern in the clinic
• Muscle issues not seen in most randomized trials because• Placebo or active drug wash-in phase • Eliminated those who didn’t tolerate the drug in the 1st 2 weeks
• Co-morbidity carefully controlled• Need randomized trials of those who are statin intolerant
Statin Safety
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Statins and cognitive functionInformation about the potential for generally non-serious and reversible cognitive side effects (memory loss, confusion, etc) ...has been added to the statin labels.....
Data from the observational studies and clinical trials did not suggest that cognitive changes associated with statin use are common or lead to clinically significant cognitive decline.
RCTS examined cognitive function in two trialsHPS: (Simvastatin 40 v placebo): No differencePROSPER: (Pravastatin 40 v placebo): No difference
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Administered a well validated modified Telephone Interview for Cognitive Status (TICS-m) questionnaire in HPS participants during their final follow-up(89% in clinic and 11% by telephone) after a mean of 5·3 years of scheduled treatment.
A TICS-m score below 22 out of 39 was prespecified as indicative of some cognitive impairment It was more common
1. older individuals2. those who had a previous stroke.
By allocation Simvastatin Placebo
Cognitively impaired 23.7% 24.2%Dementia noted 0.3% 0.3%Mean TICS-m score 24.08 24.06No significant changes seen in the scores of the 4 separate domains including memory
HPS Study Collaborative Group. Lancet 2004: 363; 757– 67.
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Enhancing Medical AdherenceFrishman WH . Am J Med 2012: 125:841-42.
Adherence is responsibility shared by patient and healthcare provider
• Patient’s socio-demographics
• Characteristics of health care provider
• Medication characteristics
• Disease characteristics
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In Conclusion: • Prevention of ASCVD is important• Guidelines must be trustworthy• Important features include:
-Transparency- Diversity of the panel interests- Focus on critical questions - RCTs must be rated for quality-Multiple levels of review including public
review
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In Conclusion: • The clinician should be able to understand guidelines that focus on:
“Whom to treat, when, with what therapeutic regimens, and with what intensity”