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Slide 1-

The Epidemiology of Arthritis EPID 624- Epidemiology of Chronic Disease
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Overview General Information History Definition Epidemiology Age Race Sex Income Education Cost Pathophysiologies of Specific Arthritides Osteoarthritis Post-Traumatic Arthritis Rheumatoid Arthritis Gout Osteoporosis Juvenile Idiopathic Arthritis Intervention and Research Primary, Secondary, and Tertiary Current Research Future Areas of Research
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Part I: General Information
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History Referenced in texts as far back as 4500 BC Native American skeletal remains from 5000 to 500 BC were examined and found to have evidence of RA William Musgrave complied De Arthritide Symptomatica, which first described the symptoms of RA Dr. Alfred Baring Garrod coined the phase “Rheumatoid Arthritis” in 1859 http://www.dailyrepublic.com/news/locallifestylecolumns/rheumatoid-arthritis-more-than-a-joint-disease/ http://www.news-medical.net/health/Arthritis-History.aspx
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Definition: Arthritis “While the word arthritis is used by clinicians to specifically mean inflammation of the joints, it is used in public health to refer more generally to more than 100 rheumatic diseases and conditions that affect joints, the tissues that surround the joint, and other connective tissue. The pattern, severity, and location of symptoms can vary depending on the type of disease. Typically, rheumatic conditions are characterized by pain and stiffness in or around one or more joints. The symptoms can develop gradually or suddenly. Certain rheumatic conditions can also involve the immune system and other internal organs of the body.” -CDC, 2015
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Activity Limitation “There is no single definition for "disability," and many programs and surveys use different definitions based on program needs and available data. Also, the same underlying cause of a disability can affect different people in different ways. It is important to remember that all people can be healthy and live well with or without a disability.” -CDC, 2016 Arthritis-Attributed Limitations Work Activity Social Participation
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Prevalence 21.6% of U.S population (46.4 million people) in 2003 22.7% of U.S. population (52.5 million people) in 2010 Projected to be 25% of U.S. (67 million) by 2030 8.8% of U.S. population reported to have both arthritis and “arthritis-attributed activity limitation” in 2003 9.8% (22.7 million people) of U.S. population now report to be activity limited due to arthritis 37% of those with arthritis in 2030 will report of having their activity limited due to the disease Chronic Epidemiology Disease and Control (2010) http://www.cdc.gov/arthritis/data_statistics/index.htm
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Mortality Rose from 5,537 in 1979 to 9,367 in 1998 Death rate increased from 2.75 per 100,000 in 1979 to 3.51 per 100,000 in 1998 80% of deaths from Arthritis were due to: Diffuse connective tissue diseases (34%) Other specified rheumatic conditions (23%) Rheumatoid Arthritis (22%) http://www.cdc.gov/arthritis/data_statistics/arthritis-related-stats.htm
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http://www.cdc.gov/arthritis/data_statistics/disabilities-limitations.htm Prevalence in Arthritis, (NHIS 2005-2030)
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http://nccd.cdc.gov/CDI/rdPage.aspx?rdReport=DPH_CDI.IndicatorMap&islCategory=ART&islIndicator=ART1_1&rdShowModes=ShowBody%2CScreen&go=GO Prevalence by State, BRFSS 2013 Prevalence by County in West Virginia, WVBRFSS 1999-2003 http://www.wvdhhr.org/bph/hsc/pubs/briefs/014/default.htm
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http://www.cdc.gov/arthritis/data_statistics/disabilities-limitations.htm Work Limitations due to Arthritis, Adults 18-64, BRFSS 2013 Social Participation Restriction, BRFSS 2013
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High Risk Groups Elderly Racial and Ethnic Minorities Females High Risk Occupations Construction Workers Professional Athletes Textile Workers Teachers Dancers Chronic Disease Epidemiology and Control (2010) http://www.everydayhealth.com/arthritis-pictures/9-worst-jobs-for-your-joints.aspx#08
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Age Risk of developing arthritis increases with age 50% of those 65 and older said that had doctor-diagnosed arthritis (NHIS 2003-2005) Chronic Disease Epidemiology and Control (2010)
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http://www.cdc.gov/nchs/data/factsheets/factsheet_arthritis.html Prevalence by Age, NHIS 2012-2013
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Race Whites are the least likely to have limitations due to Arthritis Non-Hispanic Blacks and Hispanics are the most likely to be affected Hispanic Subgroups People from the Cuban subgroup were the most likely to say that their activity was limited by arthritis, but the least likely to say their work was limited Mexicans and Puerto Ricans were the most affected by both http://www.cdc.gov/arthritis/data_statistics/disabilities-limitations.htm
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http://www.cdc.gov/arthritis/data_statistics/disabilities-limitations.htm Activity Limitations due to Arthritis by Race (NHIS, 2002-2006) Activity Limitations due to Arthritis by Hispanic Subgroup (NHIS, 2002-2006)
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Prevalence by Education and Income in Utah, BRFSS, 2014 https://ibis.health.utah.gov/indicator/complete_profile/ArthPrev.html
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Causes Obesity Injury and Trauma Repetitive joint use Physical inactivity Genetics Chronic Disease Epidemiology and Control (2010)
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Percentage of Men with Activity Limitation, NHIS 2007-2010 http://www.commed.vcu.edu/Chronic_Disease/syllabus/Osteo.html
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Prevalence of Arthritis ,by Veteran Status and Gender (BRFSS 2011) http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6344a4.htm?s_cid=mm6344a4_e
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Comorbidities Heart Disease Asthma/ COPD Diabetes Stroke http://www.cdc.gov/arthritis/data_statistics/comorbidities.htm
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http://www.cdc.gov/arthritis/data_statistics/comorbidities.htm Four Most Common Comorbidities for people with Arthritis, NHIS 2007
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Risk Factors for U.S. adults with arthritis (NHIS 2007) http://www.cdc.gov/arthritis/data_statistics/comorbidities.htm
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Costs and Hospitalization Hospitalizations 80.6 million physical visits 760,000 hospitalizations Costs Approximately $128 billion (1.2% of all GDP) in 2003 $80.8 billion in direct costs (hospitalizations) $47 billion in indirect costs (lost earnings) Increased by 24% between 1997 and 2003 WV- highest percent of GDP (2.6%) Chronic Disease Epidemiology and Control (2010) http://www.cdc.gov/arthritis/data_statistics/cost.htm
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http://www.cdc.gov/arthritis/data_statistics/cost.htm State Specific Gross Domestic Product, MMWR 2007
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http://www.cdc.gov/arthritis/data_statistics/cost.htm National Medical Expenditures among adults with arthritis, MEPS 1997-2005
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Part II: The Arthritides
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The Arthrithides Osteoarthritis Rheumatoid Arthritis Post-Traumatic Arthritis Gout Osteoporosis Juvenile Idiopathic Arthritis
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Osteoarthritis
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Pathophysiology Protective Cartilage at the end of bone is worn down over time Main areas of OA are the knees, hips, hands, and spine Symptoms include: Pain Tenderness Stiffness Loss of feeling Grating Sensation Bone Spurs
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http://www.niams.nih.gov/Health_Info/Osteoarthritis/default.asp
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Prevalence Most common form of arthritis Complied from NHANES I, NHANES III, and NHES 33.3% of those had OA of at least one site Site Specific OA 22% of adults 24-75 years of age had Radiographic Foot OA 33% of adults 24-75 years of age had Radiographic Hand OA 8% of adults 60+ years of age had Symptomatic Hand OA 37% of adults 60+ years of age had Radiographic Knee OA 12% of adults 24-75 years of age had Symptomatic Foot OA Chronic Disease Epidemiology and Control (2010)
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Mortality, Hospitalizations, and Cost Mortality Accounts for 6% of all arthritis related deaths Average is 0.2 to 0.3 deaths per 100,000 500 deaths per year Very likely to be underestimated Hospitalization Accounts for 47.4% of all arthritis hospitalizations 35% of those hospitalizations were for knee and hip joint replacements Knee replacements grew by 217% (203.6 to 645.1 per 100,000) Non-Hispanic blacks and lower income patients have lower rates of knee and hip replacements, but higher rates of mortality Cost Knee replacement- $28.5 billion Hip replacement - $13.7 billion http://www.cdc.gov/arthritis/basics/osteoarthritis.htm
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Demographics Age Increases in both prevalence and severity as one gets older Sex More prevalent among men then women 45 and under, but more prevalent among women then men 54 and older Race Knee OA more common in blacks than whites, Hip OA quite rare in Asian populations Location More prominent in the Southeastern U.S. Chronic Disease Epidemiology and Control (2010)
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Risk Factors Joint Trauma Obesity Repetitive Joint Usage Muscle Weakness Nutritional Deficiency Chronic Disease Epidemiology and Control (2010)
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High Risk Groups Genetic Predisposition Herberden’s and Bouchard’s syndrome Congenital or developmental disease Congenital Hip subluxation Previous Inflammatory Joint Disease Metabolic Disorder Hyperthyroidism Chronic Disease Epidemiology and Control (2010)
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Post-Traumatic Arthritis
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Definition and Pathophysiology Wearing down of a joint that has been involved in a injury May not appear until 10-15 years after the injury Symptoms include: Joint Pain Swelling Fluid Accumulation Bone Spurs Most likely to involve the knees and hips https://my.clevelandclinic.org/health/diseases_conditions/hic_Arthritis/hic-post-traumatic-arthritis
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Epidemiology, Causes, and Cost Affect 5.6 million adults in the U.S. (12%) 10-15% of those with OA actually have PTA Causes: Playing contact sports Physical Labor Vehicular Accidents Past joint surgery Estimated to cost about $3.06 billion dollars http://www.everydayhealth.com/news/when-old-injuries-come-back-to-haunt-you/ http://www.hedleyortho.com/post-traumatic-arthritis/ http://www.ncbi.nlm.nih.gov/pubmed/17106388
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Rheumatoid Arthritis
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Pathophysiology Chronic Inflammatory Disease that affects the joints Autoimmune disease (Macrophages is the main effector) Inflamed Synovial Tissue invades and damages cartilage Symptoms: Stiffness Swelling Pain Mainly affects small joints (hands), wrists, elbows, and ankles Can be monocyclic, polycyclic, or progressive Chronic Disease Epidemiology and Control (2010) http://www.hopkinsarthritis.org/arthritis-info/rheumatoid-arthritis/ra-pathophysiology-2/
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https://www.docresponse.com/diagnoses/orthopedics/rheumatoid-arthritis/ http://healthletter.mayoclinic.com/content/preview.cfm/n/288/t/Rheumatoid
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Prevalence, Incidence, and Mortality Estimated by the Rochester Epidemiology Project Prevalence 0.4-1.3% population worldwide 0.6% (1.5 million people) in US 2% for adults 60 and over Incidence 41 per 100,000 people are diagnosed with RA annually in U.S. Mortality 22% of all arthritis deaths are due to RA Associated with respiratory and gastrointestinal disorders http://www.cdc.gov/arthritis/basics/rheumatoid.htm Chronic Disease Epidemiology and Control (2010)
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Risk Factors Smoking Strongest modifiable risk factor for RA Genetics 60% of risk HLA-DR chain the MHC II DRB1*0401 and DRB1*0404 Age Onset is usually in adults 60+ Race No difference between blacks and whites Difference between Asians and whites Sex 2 to 3 times higher in women than men Chronic Disease Epidemiology and Control (2010)
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Prevalence by Age and Sex in Southern Sweden, 2008 http://rheumatology.oxfordjournals.org/content/49/8/1563/F1.expansion.html
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Age-Standardized DALY rates for RA by Country ,WHO 2004 https://commons.wikimedia.org/wiki/File:Rheumatoid_arthritis_world_map_-_DALY_-_WHO2004.svg Yellow- Red (40-140) per 100,000
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Gout
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Pathophysiology Metabolic disorder Inflammation due to Monosodium Uric crystals being deposited in the synovial fluid Associated with Hyperuricemia Serum urate levels about 6.8 mg/dL Initially produces acute, episodic flairs that progress to chronic arthritis Chronic Disease Epidemiology and Control (201) http://www.commed.vcu.edu/Chronic_Disease/arthritis/CMEGoout.pdf
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http://www.eatingformylife.com/gout/ http://www.webmd.com/arthritis/ss/slideshow-gout
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Prevalence, Incidence, and Mortality Prevalence 3.9% of U.S. population (8.3 million people) have gout (NHANES 2007-2008) Grew by 1.2 percentage points over 2 decades Incidence Increased from 45.0 per 100,000 in 1977-1978 to 63.3 per 100,000 in 1995-1996 Mortality Rare, but associated with increased risk for CVD http://www.cdc.gov/arthritis/basics/gout.html
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Prevalence of Gout by Country http://www.nature.com/nrrheum/journal/v11/n11/images_article/nrrheum.2015.91-f1.jpg
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Attributes Age Risk increases with age Sex Affects 3 males for every 1 female Race More common among blacks than whites
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Risk Factors and Costs Family History Genetic Polymorphisms and rare X-linked inborn errors Obesity Alcohol Consumption Meat and Seafood Consumption Occupation and environmental lead exposure Cost of Gout is approximately $31.6 billion dollars (MEPS 2011) Chronic Disease Epidemiology and Control (2010) http://www.commed.vcu.edu/Chronic_Disease/arthritis/CMEGoout.pdf http://www.cdc.gov/arthritis/basics/gout.html
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Osteoporosis
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Definition and Pathophysiology Definition Having a Bone Mass Density (BMD) of more than 2.5 standard deviations below the mean of a normal young white woman (g/A) Clinical Manifestations Fractures of the spine, hip, wrists or other areas Chronic Disease Epidemiology and Control (2010)
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Prevalence, Incidence and Costs Prevalence Affects 54 million people in the U.S. and 200 million people around the world Incidence 9 million new cases annually Costs $17.9 billion dollars per year (DHHS 2002) Chronic Disease Epidemiology and Control (2010) http://www.iofbonehealth.org/facts-statistics#category-14 http://nof.org/
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Number of Fractures due to Osteoporosis Worldwide http://www.iofbonehealth.org/epidemiology
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Risk Factors Genetic Factors 85% of risk Allelic variations of the Vitamin D, estrogen, and Type I collagen receptors are associated with higher risk Physical inactivity Low Body Weight Smoking Alcohol Consumption Aging Chronic Disease Epidemiology and Control (2010)
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Attributes Age BMD decreases at a rate of 0.5-1% per year beginning at age 40 Sex More prevalent in women than men, with an even higher risk after menopause Race BMD lowest in Asians and Whites, but hip fractures more common in whites than Asians Chronic Disease Epidemiology and Control (2010)
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Juvenile Idiopathic Arthritis
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Definition and Pathophysiology Most common of the Juvenile Arthritis diseases Autoimmune disease (Neutrophils are main effector cell) Symptoms include Fatigue Decrease physical activity Sleep problems Swelling at joints http://www.arthritis.org/about-arthritis/types/juvenile-idiopathic-arthritis-jia/symptoms.php
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Prevalence, Incidence, Attributes Prevalence 100,000 children in the U.S have JIA Incidence 13.9 per 100,000 children annually Attributes Sex One study found that it was more prevalent in girls than boys by a 2 to 1 margin Race Less common in African-American and Asian populations compared to Caucasian populations http://www.uptodate.com/contents/juvenile-idiopathic-arthritis-epidemiology-and-immunopathogenesis http://ped-rheum.biomedcentral.com/articles/10.1186/s12969-015-0030-z
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Part III: Intervention and Research
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Primary Prevention- Individual Osteoarthritis Avoid joint trauma (Also applicable to PTA) Preventing Obesity Modifying occupational joint stress Gout Weight Reduction Dietary Changes Moderation/Elimination of alcohol Osteoporosis Adequate intake of Vitamin D and Calcium during childhood Smoking cessation (Also applicable to RA) Hormone Therapy (Post-Menopause) “Fall-proofing” living areas Chronic Disease Epidemiology and Control (2010)
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Secondary Intervention- Individual Osteoarthritis X-rays and radiographs in older patients Gout Treating those with asymptomatic hyperuricemia Osteoporosis BMD testing recommended for women 65+ and men 75+ Earlier if there is a prior history of fractures Chronic Disease Epidemiology and Control (2010)
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Tertiary Intervention- Individual Pharmalogical NSAIDS Corticosteroids TNF/ IFN-1 blockers Anti-catabolic/anabolic drugs Non-pharmalogical Physical Therapy Support Groups Public Health Nursing Services Surgery Chronic Disease Epidemiology and Control (2010)
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Community Intervention
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Surveillance CDC uses 2 surveys to collect data of Arthritis and other rheumatic conditions (AORC) National Health Interview Survey (NHIS) Monitors the health of the non-institutionalized U.S Has a Core questionnaire and supplement questions Scheduled to be redesigned in 2018 Behavioral Risk Factor Surveillance System (BRFSS) Collects data on health- related risk behaviors Used for building health-promotion activities http://www.cdc.gov/brfss/about/index.htm http://www.cdc.gov/nchs/nhis/about_nhis.htm
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National Arthritis Action Plan (NAAP) Developed by CDC in 1999 Three objectives: “To establish a solid scientific base of knowledge on the prevention of arthritis and related disability.” Increase awareness of arthritis and its impact Implement programs to prevent arthritis http://www.cdc.gov/arthritis/temp/pilots-201208/pilot1/online/arthritis-challenge/05-PublicHealth/keydocuments.htm
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OA Agenda Developed in 2010 by the CDC Three goals it set to accomplish within 3 to 5 years Ensure the availability of evidence-based intervention strategies for OA Establish supportive policies Start research to better understand OA http://www.cdc.gov/arthritis/temp/pilots-201208/pilot1/online/arthritis-challenge/05-PublicHealth/keydocuments.htm
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Examples of Community Outreach Fit and Strong! EnhanceFitness Active Living Every Day Walk With Ease Buenos días, artritis National Arthritis Month (May) Arthritis Foundation Aquatic Program Arthritis Foundation Exercise Program Fitness &Exercise for people with Arthritis http://www.cdc.gov/arthritis/interventions/index.htm
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Research Funding NIH reports that $214 million dollars for FY 2015 on Arthritis Research, down from $258 million for FY 2012 Diabetes- $1.01 billion Asthma-COPD- $ 378 million CVD- $1.99 billion https://report.nih.gov/categorical_spending.aspx
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Cost: $43,120 https://projectreporter.nih.gov/project_info_description.cfm?aid=8762225&icde=0 Macrophage Inhibitory Factor and OA
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Cost: $341,550 https://projectreporter.nih.gov/project_info_description.cfm?projectnumber=2R01AR051749-10A1 Complement and RA
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Cost: $667,898 https://projectreporter.nih.gov/project_info_description.cfm?projectnumber=5R01AR046849-14 Heart Disease and RA
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Areas of Future Research Arthritis National Research Foundation Osteoarthritis Study: “Missing Link” to Repairing Joint Cartilage by Dr. Denis Evseensko Stem Cells may be used to replace worn-down articular cartilage Enzyme Study May Lead to New OA Treatment by Dr. Nidhi Bhutani Targeting gene expression may be new way to treat OA National Osteoporosis Foundation Identifying a High Bone Mass gene Excessive bone remodeling http://www.curearthritis.org/osteoarthritis-research/ http://nof.org/files/nof/public/content/file/7790/upload/1350.pdf
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Questions? Comments? Concerns?