rosemarie hirsch m.d., m.p.h. measuring health care quality from the national health and nutrition...
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Rosemarie Hirsch M.D., M.P.H.
Measuring Health Care Measuring Health Care Quality Quality from thefrom the
National Health and Nutrition National Health and Nutrition Examination Survey (NHANES)Examination Survey (NHANES)
U.S. DEPARTMENT OF HEALTH AND HUMAN SERVICESCenters for Disease Control and PreventionNational Center for Health Statistics
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Presentation Topics
• NHANES overview
• Health condition components and health care quality measures collected
• Examples of healthcare quality analyses
• Public data files and access
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NHANESNHANES
• NHES I: 1960-62, ages 18-79
• NHES II: 1963-65, ages 6-11
• NHES III: 1966-70, ages 12-17
• NHANES I: 1971-75, ages 1-74
• NHANES II: 1976-80, ages 6 mos.-74
• HHANES: 1982-84, ages 6 mos.-74
• NHANES III: 1988-94, ages 2 mos. and older
• NHANES: 1999 and beyond, all ages
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Current NHANESCurrent NHANES
Sample Design•Continuous data collection beginning in
1999•Annual national sample of 5,000
persons
Eligible population•Civilian, non-institutionalized population•Residents of all states and D.C.•All ages
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NHANES – NHANES – OversamplingOversampling•African Americans
•Mexican Americans
•Adolescents aged 12-19
•Persons aged 60+
•Pregnant women
•Low-income families
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• Traditional CAPI Traditional CAPI interviewing with interviewing with portable keyboardportable keyboard.
• Traditional CAPI Traditional CAPI interviewing with interviewing with portable keyboardportable keyboard.
NHANES Household NHANES Household InterviewInterview
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NHANES Household InterviewNHANES Household Interview
• Broad range of health conditions
• Environmental and occupational exposures
• Health behaviors
• Nutrition and dietary supplements
• Prescribed medications
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NHANES Mobile Exam NHANES Mobile Exam CenterCenter
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• Standardized physical exam
• Conducted at mobile exam center• Medical & dental exams
• Physiological measurements
• Laboratory test
• Administered by trained medical personnel
NHANES ExaminationNHANES Examination
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NHANES Mobile Exam NHANES Mobile Exam CenterCenter
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NHANES TOPICSNHANES TOPICS
• Cardiovascular disease
• Diabetes, lower extremity disease
• Bone status, osteoporosis
• Fitness, strength and functional limitation
• Vision, hearing and balance
• Oral health
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NHANES TOPICS, NHANES TOPICS, ContinuedContinued
• Nutrition
• Anthropometry
• Mental health
• Risk behaviors
• Reproductive health
• Environmental exposures
• Infectious diseases and immunization status
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NHANES LaboratoryNHANES Laboratory
• CBC and WBC differential
• Pregnancy test
• Blood, urine and vaginal swab processing
76 different vials of samples
26 laboratories
300 laboratory assays
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Landmark findings and Landmark findings and public health resultspublic health results
• High blood lead levelsLead out of gasoline
• Low folate levelsMandatory food fortification
• Rising levels of obesityPublic health action plan
• Racial and ethnic disparities in Hepatitis BUniversal vaccination of all infants & children
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Health Care Quality Data Analysis Examples
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Ever Had Blood Cholesterol Checked:Percent of U.S. Adults Age 40+ years
72.5
84.7
69.1
8078.1
92.2
0
20
40
60
80
100
1988-1994 1999-2000
All (Age adjusted)
40-59 years
60+ years
Source: 2004 National Healthcare Quality Report
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Ever Told by Doctor Had High Blood Cholesterol:
Percent of U.S. Adults Age 40+ years
28.9 27.4 31.336.4
30.5
45.8
0
20
40
60
80
100
All (Ageadjusted)
40-59 years 60+ years
1988-1994
1999-2000
Source: 2004 National Healthcare Quality Report
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Taking Cholesterol-lowering Medications:Percent of U.S. Adults Age 40+ years Ever
Told by Doctor they had High Blood Cholesterol
17.9
37.7
13.3
31.625.2
47.6
0
20
40
60
80
100
1988-1994 1999-2000
All (Age adjusted)
40-59 years
60+ years
Source: 2004 National Healthcare Quality Report
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Cholesterol and HgA1c Control:Percent of U.S. Adults Age 18+ years with
Diagnosed Diabetes
39.9 43.2
28.3
49.2
38.328.6
0
20
40
60
80
100
Cholesterol< 200 mg/dl
HgA1c < 7.0
HgA1c > 9.0
1988-1994
1999-2000 Age-adjusted
Source: 2004 National Healthcare Quality Report
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Percent of U.S. Adults age 20-74 years with Hypertension
38.1 39.8 40.4
23.9 28.7
0
20
40
60
80
100
1960
-62
1971
-74
1976
-80
1988
-94
1999
-200
0
Age-adjusted
Source: Health United States, 2003
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Awareness, Treatment and Control:Percent of U.S. Adults Age 18-74 years with
Hypertension
10
2734
51
31
68
54
70
59
0
20
40
60
80
100
Awareness Treatment Control
1976-1980
1991-1994
1999-2000
Source: JNC 7 Report, 2003
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Health Care Quality Data for Cholesterol and Hypertension
• NHES• NHANES I• NHANES II• NHANES III• NHANES 1999-2000• NHANES 2000-2001
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Directly download from Directly download from our websiteour websitehttp://www.cdc.gov/nchs/nhanes.htm
NHANES DataNHANES Data
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