SUBJECT: EPIDEMIOLOGY Calculate category statistics: Autism is a disability that
ID: 3004247 • Letter: S
Question
SUBJECT: EPIDEMIOLOGY
Calculate category statistics: Autism is a disability that is characterized by a severely decreased ability to engage in communication and social interaction. A study was undertaken to establish the prevalence of Autism in a community. Data from this study are reported below:
Children Diagnosed With Autism per Age Group
Age Group
Children With Autism
3–5
193,479
6–10
175,417
a) Calculate the prevalence rate of autism for the two age categories.
b) Calculate the prevalence to a rate per 1,000.
Children Diagnosed With Autism per Age Group
Age Group
Children With Autism
3–5
193,479
6–10
175,417
Explanation / Answer
Total children = 193479 + 175417 = 368896
Prevalence rate = number of people affected at a specified time / total population at that time.
a) For age group 3-5: Prevalence rate = 193479/368896 = 0.525
For age group 6-10: Prevalence rate = 175417/368896 = 0.475
b) prevalence to a rate per 1,000 = Prevalence rate x 1000
prevalence to a rate per 1,000 for age group 3-5 = 0.525 x 1000 = 525
prevalence to a rate per 1,000 for age group 6-10 = 0.475 x 1000 = 475
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