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Question: At an initial examination in Oxford, Mass., migraine headache was found in 5 of 1,000 men aged 30…

At an initial examination in Oxford, Mass., migraine headache
was found in 5 of 1,000 men aged 30 to 35 years and in 10 of 1,000
women aged 30 to 35 years. The inference that women have a two
times greater risk of developing migraine headache than do men in
this age group is:

a. correct

b. incorrect, because a ratio has been used to compare male and
female rates

c. incorrect, because of failure to recognize the effect of age
in the two groups

d. incorrect, because no data for a comparison or control group
are given

e. incorrect, because of failure to distinguish between
incidence and prevalence

2. Aprevalence survey conducted from January 1 through December
31, 2003, identified 1,000 cases of schizophrenia in a city of 2
million persons. The incidence rate of schizophrenia in this
population is 5/100,000 persons each year. What percent of the
1,000 cases were newly diagnosed in 2003?

3. Which of the following is an advantage of active

a. requires less project staff

b. is relatively inexpensive to employ

c. more accurate due to reduced reporting burden for health care

d. relies on different disease definitions to account for all
cases e. reporting systems can be developed quickly

4. What would be the effect on age-specific incidence rates if
women with hysterectomies were excluded from the denominator of
calculations, assuming that there are some women in each age group
who have had hysterectomies?

a. the rates would remain the same

b. the rates would tend to decrease

c. the rates would tend to increase

d. the rates would increase in older groups and decrease in
younger groups

e. it cannot be determined whether the rates would increase or

5. Asurvey was conducted among the nonhospitalized adult
population of the United States during 1988 through 1991. The
results from this survey are shown below. Age Group Personswith
Hypertension (%) 18–29 years 4 30–39 years 10 40–49 years 22 50–59
years 43 60–69 years 54 70 and older 64 The researchers stated that
there was an age-related increase in the risk of hypertension in
this population. You conclude that the researchers—

a. is correct

b. is incorrect because it was not based on rates

c. is incorrect because incidence rates do not describe risk

d. is incorrect because prevalence is used

e. is incorrect because the calculations are not

Questions 6 and 7 use the information below: Population of the
city of Atlantis on March 30, 2003 = 183,000 No. of new active
cases of TB occurring between January 1 and June 30, 2003 = 26 No.
of active TB cases according to the city register on June 30, 2003
= 264

6. The incidence rate of active cases of TB for the 6-month
period was:

a. 7 per 100,000 population

b. 14 per 100,000 population

c. 26 per 100,000 population 84 / 466

d. 28 per 100,000 population e. 130 per 100,000 population

7. The prevalence rate of active TB as of June 30, 2003,

a. 14 per 100,000 population

b. 130 per 100,000 population

c. 144 per 100,000 population

d. 264 per 100,000 population

e. none of the above

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