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Jane F. Gentleman, PhD
Hanyu Ni, PhD
U.S. DEPARTMENT OF HEALTH AND HUMAN SERVICESCenters for Disease Control and PreventionNational Center for Health Statistics
Early Release of Early Release of Selected Estimates from theSelected Estimates from the
National Health Interview National Health Interview SurveySurvey
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BackgroundBackground
•National Health Interview Survey (NHIS): A large, complex national survey
•1997 NHIS redesign
•Timeliness of annual MICRODATA releases is good and getting even better
•Early Release program (ER) now releases updated ESTIMATES every 3 months
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BackgroundBackground
•Expert meeting: Identified key measures
•Determined how to expedite editing and weighting
•Chose to release on Internet only
•First release: April 2001
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NHIS Early Release (ER) NHIS Early Release (ER) ProgramProgram
Objectives
•Provide ready and timely access to the most recent NHIS key estimates
•Monitor health and health care
•Measure progress toward national public health objectives
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NHIS ERNHIS ER FeaturesFeatures
•Web-based only
•Uses partial-year data
•Released…
…in March, June, September, and December
…6 months after the end of each quarter of data
collection
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NHIS ERNHIS ER Currently Covers 15 Currently Covers 15
MeasuresMeasures
•Health insurance coverage
•Usual place to go for medical care
•Obtaining needed care
•Flu vaccination
•Pneumococcal vaccination
•Obesity
•Physical activities
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NHIS ERNHIS ERCurrently Covers 15 Measures, Cont.Currently Covers 15 Measures, Cont.
•Current smoking
•Alcohol consumption
•HIV testing
•General health status
•Personal care need
•Serious psychological distress
•Diagnosed diabetes
•Asthma episodes
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How Are The Results How Are The Results Presented in The NHIS Presented in The NHIS
ER?ER?
How Are The Results How Are The Results Presented in The NHIS Presented in The NHIS
ER?ER?
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NHIS ERNHIS ERPresentationPresentation
NHIS ERNHIS ERPresentationPresentation
Trends •1997-latest available quarter
Current estimates•By age, sex, and race/ethnicity
Percent and 95% CI
Graphs, tables, and highlights
Data tables for figures
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An Example:An Example:
Prevalence ofPrevalence of Current Current SmokingSmoking
An Example:An Example:
Prevalence ofPrevalence of Current Current SmokingSmoking
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Prevalence of Current SmokingPrevalence of Current SmokingAmong AdultsAmong Adults
SOURCE: CDC/NCHS, National Health Interview Survey, 1997-2003
Percent 95% confidence interval
0
15
20
25
30
1997 1998 1999 2000 2001 2002 2003(Jan.-June)
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Prevalence of Current SmokingPrevalence of Current Smoking Among Adults by Age and SexAmong Adults by Age and Sex
Percent
18-44 45-64 65 and over
Age group (years)
Male FemaleTotal95% confidence interval
0
5
10
15
20
25
30
35
SOURCE: CDC/NCHS, National Health Interview Survey, 1997-2003
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Prevalence of Current SmokingPrevalence of Current Smoking Among Adults by Race/EthnicityAmong Adults by Race/Ethnicity
Percent
Hispanic White BlackNot Hispanic
95% confidence interval
0
5
10
15
20
25
30
NOTE: The percents are age- and sex-adjusted.SOURCE: CDC/NCHS, National Health Interview Survey, Jan.-June, 2003
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Flu VaccinationFlu VaccinationFlu VaccinationFlu Vaccination
•Target groups
•Optimal vaccination time
•NHIS flu question: seasonality
•Delay in the vaccine availability • 2000-01 season• 2001-02 season
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65 years and over
50-64 years
18-49 years
Year (quarter)1997 1998 20001999 2001 200
22003
0
20
40
60
80
Flu Vaccination by Age Flu Vaccination by Age GroupGroup
and Quarterand Quarter
Flu Vaccination by Age Flu Vaccination by Age GroupGroup
and Quarterand Quarter
SOURCE: CDC/NCHS, National Health Interview Survey, 1997-2003
Percent
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ObesityObesityObesityObesity
•Based on self-reported weight and height
•Underestimated but consistent over time
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Percent 95% confidence interval
0
5
10
15
20
25
30
1997 1998 1999 2000 2001 2002 2003(Jan.-June)
Prevalence of Obesity Among Adults
Prevalence of Obesity Among Adults
SOURCE: CDC/NCHS, National Health Interview Survey, 1997-2003
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Percent
Hispanic White BlackNot Hispanic
Male Female95% confidence interval
0
10
20
30
40
50
NOTE: The percents are age-adjusted.SOURCE: CDC/NCHS, National Health Interview Survey, Jan.-June, 2003
Prevalence of Obesity Among Adults
by Race/Ethnicity
Prevalence of Obesity Among Adults
by Race/Ethnicity
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Health Insurance CoverageHealth Insurance CoverageHealth Insurance CoverageHealth Insurance Coverage
•One of the 15 measures in the main ER report
•A special report on health insurance coverage: more details
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Lack of Insurance Coverage* Lack of Insurance Coverage* Three MeasuresThree Measures
Lack of Insurance Coverage* Lack of Insurance Coverage* Three MeasuresThree Measures
• At the time of interview
• For at least part of the past year
• For more than one year
*Includes those having only IHS or single service plans
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Type of CoverageType of CoverageType of CoverageType of Coverage
Private
•Employer-based or directly purchased
Public
• Medicaid, Medicare
• SCHIP
• Other government programs
• Military health plans
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Subgroup Estimates Subgroup Estimates Subgroup Estimates Subgroup Estimates
Trend
• 1997-latest available quarter
• By age and poverty status*
Current estimates
• By age, sex, and race/ethnicity
• By region, education, employment status, and marital status*
*In the special report
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0
5
10
15
20
1997 1998 1999 2000 2001 2002 2003(Jan.-June)
95% confidence interval
Percent
Uninsured at the Time of Interview for Persons of All Ages
Uninsured at the Time of Interview for Persons of All Ages
SOURCE: CDC/NCHS, National Health Interview Survey, 1997-2003
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Uninsured Among ChildrenUnder age 18
Uninsured Among ChildrenUnder age 18
0
5
10
15
20Percent
1997
1999
2001
2003
At the time of interview
At least part of past year
For more than a year
SOURCE: CDC/NCHS, National Health Interview Survey, 1997-2003
1998
2000
2002
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0
10
20
30
40
50
60Percent
1997
1999
2001
2003
Uninsured
Private
Public
SOURCE: CDC/NCHS, National Health Interview Survey, 1997-2003
1998
2000
2002
Type of Coverage Among Near Poor Children Under Age 18
Type of Coverage Among Near Poor Children Under Age 18
Jan.-June
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SOURCE: CDC/NCHS, National Health Interview Survey, Jan.-June, 2003
Uninsured Among Adults Aged 18-64 Years
Uninsured Among Adults Aged 18-64 Years
0
10
20
30
40
50
60Percent
Employed Unemployed
Not in workforce
At interviewPast year
>1 year
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Estimates of Uninsured: Estimates of Uninsured: Three National SurveysThree National Surveys
Estimates of Uninsured: Estimates of Uninsured: Three National SurveysThree National Surveys
NHIS: Health status and health care utilization
CPS: Employment and State-specific
data
MEPS: Health care expenditure and utilization
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Estimates of Uninsured: Estimates of Uninsured: Three National Surveys -Cont. Three National Surveys -Cont.
Estimates of Uninsured: Estimates of Uninsured: Three National Surveys -Cont. Three National Surveys -Cont.
NHIS Jan.-June 2003Dec. 2003
CPS Jan.-Dec. 2002Sept. 2003
MEPS Jan.-June 2002 Nov. 2003
Data sourceMost recent estimates
Releasedate
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URL: www.cdc.gov/nchs/nhis.htm
NCHS Web page: Information Showcase
Where to Find the NHIS ER Where to Find the NHIS ER Where to Find the NHIS ER Where to Find the NHIS ER