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ESTABLISHING HEALTH INTERVENTION PRIORITIES FOR LOCAL PUBLIC
HEALTH AGENCIES
Alexandre [email protected]
Tacoma-Pierce County Health Department, WA
GOAL 2
“To identify three broad-based, behavioral risks to health which, if reduced, will offer a tangible reduction in the burden of preventable illness and death in the Pierce County population*.”
j* Tacoma - Pierce County Health Department Strategic Plan, 1996-2000 (Tacoma, WA)
This presentation demonstrates the method designed for identification of the leading behavioral risks to health.
If these risks were reduced, the method would allow to estimate the resulting reduction in the burden of preventable illness and death.
GOAL 2 (contd)
RISK FACTOR
If a disease/cause of death (D) is more common among those with a certain characteristic (C) than among those without it, then there is an association between C and D.
If C occurs, or is present, prior to D, the characteristic C is a risk factor for the disease (cause of death) D.
C
is
present
C
is not
present
D
D
D
D
D
D
D
D
D
BURDEN OF HEALTH RISK
The burden of a health risk is composed of:
Disabled years lived with preventable
illnesses (morbidity component)
Deaths associated with specific risk
behaviors (mortality component)
FROM ROUTINELY COLLECTED HEALTH DATA TO MILLER’S INDEX
In 1970, J.E.Miller offered the Q-index which allows integrating of morbidity and mortality data, so that a fairly consistent ranking of the classes of disease could be made.
Q-INDEX: DEFINITION
Qk = (MTk/MRk)*Pk*Dk
+ 100,000*Ak /365 /N
+ 100,000*Bk /(3*365)/N
Q-INDEX: DEFINITION (contd)
MTk (MRk) : age-/sex- adjusted mortality ratein target (reference) population;
Pk : years of life lost due to premature death,average per one death;
Dk : crude mortality rate;Ak : number of inpatient days, per year;Bk : number of outpatient visits, per year; N : size of the target population.___________________________________________________________________________________________________________________________
k indicates disease/cause of death.
Q-INDEX: DISCUSSION
Q-index provides a rationale for combining mortality and morbidity components in a single index number which is used for ranking
This rank pertains to a given class of disease/cause of death
In reality, the risk factor is associated with more than one class of disease/cause of death
FROM Q-INDEX TO THE RISK PRIORITY INDEX
The Q-index cannot be used for prioritizing health programs when those programs pertain to the behavioral health risks associated with multiple classes of diseases
VISUALIZING HEALTH RISK
Mor
bid
ity
Eff
ect
Mortality Effect
A
B
D
C
F
JDIS
JDTH
RISK PRIORITY INDEX: DEFINITION
The Risk Priority Index (RPI) is defined as the sum of all partial impacts of the health risk of interest on the population health.
Partial impacts of diseases and deaths in RPI are measured with the use of the Q-index.
CALCULATING RPI
The method of calculating the RPI components depends on the availability of relevant data
The direct method is based upon data collected on relative risks and prevalence pertaining to the risk factor of interest, along with mortality, bed-days, and the outpatient visits
If some of the data for the direct method is unavailable, experts best estimate can be used for the lacking data
CANDIDATE RISK FACTORS
1. Violence/Firearms 8. Alcohol misuse 2. Physical inactivity 9. Air quality
3. Food quality 10. Tobacco use
4. Water quality 11. Dietary habits
5. Unsafe sexual behavior 12. Hazardous waste
6. Seat belt use 13. Workplace hazards
7. Cycle helmet use 14. Immunization levels
TOBACCO LIST
There are 25 entries in Tobacco List. Among them:
ICD CodeLip, oral cavity, pharynx (140-149)Esophagus (150)Pancreas (157)Larynx (161)Trachea, lung, bronchus (162)more ...
TOBACCO: RPI
Each year in Pierce County::
1,072 deaths are associated with tobacco smoking
The equivalent of 3,275 person-years are lost prematurely due to the causes associated with tobacco smoking
TOBACCO: RPI (contd)
One third of all hospital bed days can be attributed to the effects of tobacco use
Residents spend the equivalent of 53 years in Pierce County hospitals due to illnesses related to tobacco
About 53,000 outpatient visits are associated with cigarette smoking
effects
DIETARY FACTORS AND ACTIVITY PATTERNS (DFAP) LIST
Heart diseases
Cerebrovascular diseases
Cancers
Diabetes
DIETARY FACTORS AND ACTIVITY PATTERNS: RPI
Each year in Pierce County:
889 deaths are associated with dietary factors and activity patterns (DFAP)
2,615 years of potential life are lost due to diseases associated with DFAP
Approximately 11,680 bed-days and 3,300 outpatient visits are associated with illnesses related to DFAP
ALCOHOL LIST
There are 36 entries in Alcohol List. Among them:
ICD Code Lip/oral cav/pharynx (140-149)Esophagus (150)Stomach (151)Liver (155)Larynx (161)Alcoholic psychoses (291)more ...
ALCOHOL MISUSE: RPI
Each year in Pierce County:
275 deaths are associated with alcohol misuse
3,793 years of potential life are lost inassociation with alcohol misuse
Approximately 13,400 bed-days and 48,700 outpatient visits are associated with illnesses related to alcohol misuse
FIREARMS LIST
ICD CodeUnintentional firearms E922Suicide by firearms E955.0 - E955.4Assault by firearms E965.0 - E965.4Legal, other firearms E970, E985.0 - E985.4
VIOLENCE WITH FIREARMS: RPI
Each year in Pierce County:
95 people die from a firearm wound 2,679 years of potential life are lost Equivalent of 2 years are spent in
hospitals
UNPROTECTED SEX LIST
ICD CodeHIV, sexually acquired (042)
Hepatitis B infection, sexually acquired (070.2, 070.3)
Syphilis and other venereal diseases (090 - 099)
Trichomoniasis (131)
Cervical cancer (fem) (180)
UNPROTECTED SEX: RPI
Each year in Pierce County:
54 people die from diseases associated with unprotected sex
1,512 years of potential life are lost The equivalent of 8 years are spent
in hospitals
RISK PRIORITY INDEX:CALCULATION RESULTS
Tobacco DFAP Alcohol Firearms Sex
_________________________________________________________________________________________________________________________________________________________
__ Deaths 1,072 889 275 95 54
_________________________________________________________________________________________________________________________________________________________
_ YPLL/Mort. 3,275 2,615 3,800 2,680 1,500
_________________________________________________________________________________________________________________________________________________________
__ Bed-days 19,000 11,680 13,400 760 2,900 _________________________________________________________________________________________________________________________________________________________
_ Outp.vsts 53,000 3,300 48,700 N/A 200
Losses pertaining to risk behaviors(per one year, Pierce County population)
RISK PRIORITY INDEX
0
200
400
600
800
1,000
1,200
0 20 40 60 80 100 120
Deaths and YPLL/Morbidity
Tobacco
Alcohol
DFAP
Microbial
Firearms
Unprotected sex
Years of Potential Life Lost / Morbidity
Dea
ths
RISK PRIORITY INDEX
0
500
1,000
1,500
2,000
2,500
3,000
3,500
4,000
0 20 40 60 80 100 120
Firearms
YPLL/Mortality and YPLL/Morbidity
Years of Potential Life Lost/Morbidity
Yea
rs o
f P
oten
tial
Lif
e L
ost/
Mor
talit
y
Unprotected sex
Microbial
Dietary Factors/Activity Patterns
Alcohol
Tobacco
FROM THE RISK PRIORITY INDEX TO THE HEALTH INTERVENTION
PRIORITY INDEX
The RPI cannot be used for establishing priorities of health interventions
The Health Intervention Priority Index accounts for the partial reduction of the health risks
HEALTH INTERVENTION PRIORITY INDEX: DEFINITION
The Health Intervention Priority Index (HIPI) is the quantitative measure of improvement of the population health caused by implementation of the health intervention
The improvement is measured in person-years of life saved
TOBACCO: HIPI
It was assumed in this study that the relative reduction of smokers in Pierce County by 40% (from about 25% down to 15%) is an achievable goal.
As a result: 240 deaths would be prevented 858 person-years of life would be
saved
DIETARY FACTORS AND ACTIVITY PATTERNS: HIPI
It was assumed in this study that relative reduction of the aggregated risk factor associated with dietary factors and activity patterns by 15% is an achievable goal.
As a result: 134 deaths would be prevented 253 person-years of life would be saved
ALCOHOL: HIPI
It was assumed in this study that the relative reduction of the aggregated risk factor associated with alcohol misuse by 20% is an achievable goal.
As a result: 55 deaths would be prevented 775 person-years of life would be saved
FIREARMS: HIPI
A 15% relative reduction of the aggregated risk factor associated with firearms was assumed in this study as an achievable goal.
As a result: 14 deaths would be prevented 402 person-years of life would be saved
UNPROTECTED SEX: HIPI
A 10% relative reduction of the aggregated risk factor associated with unprotected sex was assumed in this study as an achievable goal.
As the result: 5 deaths would be prevented 160 person-years of life would be saved
ANTICIPATED REDUCTION OF DEATHS AND YPLL
Tobacco DFAP Alcohol Firearms Sex ___________________________________________________________________________________________________________________________________________________
Risk Reduction 40% 15% 20% 15% 10%
___________________________________________________________________________________________________________________________________________________ Deaths 240 134 55 14 5
__________________________________________________________________________________________________________________________________________________ YPLL/Mortality 832 248 759 402 151
___________________________________________________________________________________________________________________________________________________ YPLL/Morbidity(Inpatient) 14 5 7 0.3 0.8 ___________________________________________________________________________________________________________________________________________________ YPLL/Morbidity(Outpatient) 12 0.5 9 - -
HEALTH INTERVENTION PRIORITY INDEX: DEATHS VS. YPLS/TOTAL
S
Years of Potential Life Saved (Total)
Dea
ths
150 300 450 600 750 900
125
250Tobacco
Alcohol
DFAP
Firearms
Unprotected Sex
HEALTH INTERVENTION PRIORITY INDEX: YPLS/MORTALITY VS. YPLS/MORBIDITYY
ears
of
Pot
enti
al L
ife
Sav
ed (
Mor
bid
ity)
Years of Potential Life Saved (Mortality)
150 300 450 600 750 900
Tobacco
Alcohol
DFAPFirearms
Unprotected Sex
6
24
18
12
CONCLUSION
The 3 leading behavioral risks to health in Pierce County are: TobaccoAlcoholFirearms
Reduction in the burden of preventable illness and death is estimated.