187 of all n di would be unpoible, the Cti ha e sericus dportable, maining that

Question

187 of all n di would be unpoible, the Cti ha e sericus dportable, maining that eases they Tablez) Thie infermaition appeans ant of the CD publication Morbldlity and suscepisble population during tut period, an wom in the wch wwk par, cif dhe CDC publication Morbidity Martality Wiraly Reort INR The CDe u this Just as with morbidity and motality the sine of the popula- innation tracoutvaks, deathe and even the a tion is determined at the midpoint of the period. aod the arsce of never before seen ailments severe acute nupiratory constant K is used to make ihe incidence a more, easily of period ynhome tSAKS) was added to the list in 2003 and pokenitial pandemic influensa HSN1 (hind nu) and HINT eporable number Morbidity, mortality, and incidence are often combined with other dats, such as the geographic lecation of cases the wine Bu) in 2000Ad 2008 ropectively While the full range of sMatistical analyses employed bysex, race, and behavior of those inieched, and even the time the CDC is beyond the scope of this book, three commfyear. Togethet the information alows the CDC to traek epidemiological measurements can be easily calculated The diseases, predict future outbeaks, and devise prevention fint of t Morbidity is casculated b dividing the number ol cases ota mine the incidence for a reportable disease. calculated. The dieane in a givwn perkd by the nomber of people Mscwpti- ble to that disemer PRE-LAB QUESTIONS alept ton size Define the following terms: at midi Sporadic where K is a factor that varies and serves to assist in more clearly nporting the results. Two aspects of the equation above deserve a lhttle more explanation. First, because pop ulation size is constantly changing. it is defined as the num ber of people preent at the midpoin of the time period being studied. Second, because morbldity is generally a very small number it is commonly multiplied by a power of 10 such as 10,000 or 100,000 (the constant K) so that it can be reported as whole number. For instance, a morbidity rate of 0000012 can be multiplied by 1,000,000, allowing it to be reported as 12 cases per 1000000 persons as opposed to Endemic 0.000012 cases per person Epidemic Mortality is the second epidemiological measurement and refers to the number of deaths within a specified period among people having a particular disease. The equation for deterimining mortality can be written as Mortalityno.people wi no, disease-related deaths per period no. people with the disease Pandemic The constant K is used just as it was for morbidity, so mor- tality can be reported as a whole number of cases per, for example, 10000 or 100,000 people. a disease during a specified period to the size of the 2. Use the informotion in the occomparnying table to o Finally, incidence compares the number of new cases of morbidity, mortality, and incidence for each disease

Explanation / Answer

Incidence rate can be defined as the new number of cases of a disease that occur during a specific period of time in a population.

It can be calculated by using the formula:              

In the above equation the value 1000 can vary to million or billion.

Here, the value of k can be taken as 1 million.

From the given data the total number of new cases are 5925 + 14066 = 20018

Total susceptible population = 316971485

therefore, incidence rate can be calculated as,

20018 / 316971485 = 6.315394 * 10-5

Now the incidence can be calculated per million population.

Then, incidence rate = 6.315394 * 10-5 * 106

                                               = 6.315 cases per 1 million population

If the population is calculated for each week then, incidence rate can be calculated as:

Week 1 incidence rate = 5952 / 316971485 * 1000000 = 18.77 cases for 1 million population

Week 2 incidence rate = 14066 / 316971485 * 1000000 = 44.37 cases for 1 million population

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