# Academy of Chinese Culture and Health Sciences Odds Ratio Biostatistics Questions

‫المملكـــــة العربية السعودية‬‫وزارة التعليم العــــــــــــــالي‬
‫جامعة طيبة‬
‫كلية العلوم الطبية التطبيقية‬
‫ينبـــــــع‬
sMinistry of Higher
Education
Taibah University
College of Medical Applied
Science
Yanbu
Open book exercise substitute for epidemiology and biostatistic
Second year level (6)
Student Name:
Student Number:
Time:
5days
Date :
3/9/1440—8/9/1441
Number of question
9
No. of Questions
9Q
Final Score
Total
Student Score
20
20
be sure that there were 9 question ) .
HOME WORK (substitute for final exam ) (20MARKS )
QUESTION TOTAL MARK 20
1-In this table Association between meat consumption and enteritis
in specific area. calculate the odds ratio ( 1MARKS)
Exposure (recent
meat ingestion)
Disease (enteritis
necroticans)
Total
Yes
No
Yes
50
11
61
No
16
41
57
Total
66
52
118
2- A sample including 1, 500 women age 70-74 years was selected
from the population of Helsinki City area. After examination, 120
were classified as having the diagnosis of depression. Calculate the
prevalence of depression ( 1MARKS)
3- In 1973 there were 29 cases of myocardial infarction in Stockholm
among men age 40 – 44 years (Ahlbom 1978). The number of personyears was 41.532 for men in that age group. Calculate The incidence
rate per year ( 1MARKS)
patients who had not, 75 and 16, respectively, developed hepatitis
during a 2.5 year follow-up in a study designed. calculate the relative
risk. ( 1MARKS)
5- Study was conducted based on middle-aged men who developed
myocardial infarction in the years 1974-76 and on controls from the
general male population. Information was compiled on the country of
origin and length of stay in Sweden.
Calculate the Odds ratio of myocardial infarction for those living in
Sweden for 20 years or more (1MARKS)
Distribution of cases and controls for those living in Sweden for more
than 20 years
Exposed
no
324
832
832
yes
10
31
24
Cases
Controls
6- A survey about the daily number of medicines consumed by people over 70
shows the following results:
3
2
2
1
3
3
2
5
2
0
0
1
1
2
4
0
2
2
3
3
5
0
1
1
3
1
2
5
3
3
1
4
4
2
2
3
4
0
3
1
1. Construct the frequency distribution table of the sample. ( 4MARKS)
2. Draw the bar chart of the sample and the polygon.
3. Draw the cumulative relative frequency bar chart and polygon .
7-In a survey about the dependency of older people, 23 persons over 75 years
B D A B
B
C C
B C D E A B C
E A
B
C D
B
B A A
where the meanings of letters are:
A No help. B Help climbing stairs. C Help climbing stairs and getting up from a
chair or bed. D Help climbing stairs, getting up and dressing. E Help for almost
everything.
Construct the frequency distribution table and a suitable chart. ( 4MARKS)
8-The number of people treated in the emergency service of a
hospital every day of November was
15 23 12 10 28 7 12 17 20 21 18 13 11 12 26 30 6
16 19 22 14 17 21 28 9 16 13 11 16 20
1. Construct the frequency distribution table of the sample. Draw
a suitable chart for the frequency distribution.
2. Draw a suitable chart for the cumulative frequency
distribution.
( 5MARKS)
9- Twenty-five army inductees were given a blood test to determine their blood type.
The data set is
A
B
B
AB
O
O
O
B
AB
B
B
B
O
A
O
A
O
O
O
AB
AB
A
O
B
A
Construct a frequency distribution for the data ( 2MARKS)
Good luck

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