|
Formula 1 - Disease point prevalence in the sample (%)
|
P
i
= D
i
/E
i
*100
|
| |
P = Prevalence (in %) of the disease in the sample
|
| |
D = Number of diseased cases in the sample
|
| |
E = Number of individuals in the sample
|
| |
i = Age and sex group category i
|
|
Formula 2 - Exposure point prevalence in the total population (%)
|
EP
i
= X
i
/T
i
*100
|
| |
EPi = Prevalence (in %) of the exposure in the total population
|
| |
Xi = Number of exposed individuals in the total population
|
| |
Ti = Total population
|
| |
i = Age and sex group category i
|
|
Formula 3 - Disease point prevalence in the total population (%)
|
P
2
= X
i
/100*P
i
|
| |
P2 = Prevalence (in %) of the disease in the total population
|
| |
X = Number of exposed individuals in the total population
|
| |
P = Prevalence (in %) of the disease in the sample
|
| |
i = Age and sex group category i
|
|
Formula 4 - Disability-adjusted life years (DALYs)
|
DALY
i
= YLL
i
(a
i
*b
i
*c
i
) + YLD
i
(d
i
*e
i
)
|
| |
DALY = Disability-adjusted life years
|
| |
YLD = Years lived with disability
|
| |
a = Number of incident cases
|
| |
b = Disability weight
|
| |
c = Average duration of disability
|
| |
YLL = Years of life lost due to premature mortality
|
| |
d = Number of deaths
|
| |
e = Standard life expectancy at the age of death
|
| |
i = Age and sex group category i
|
|
Formula 5 - Disability-adjusted life years (DALYs) per 1,000 population
|
DALYr
i
= DALY
i
/T
i
*1,000
|
| |
DALYr = DALYs per 1,000 population
|
| |
DALY = Number of total DALYs
|
| |
T = Total population
|
| |
i = Age and sex group category i
|
