![ggjhuvth](/avatars/4360.jpg)
ggjhuvth
16.03.2020 •
Mathematics
A sample of 100 healthy men was followed for the development of prostate cancer. After being followed for 5 years, 20 men of the study sample developed prostate cancer. Another 10 men of the sample were followed up for 1 year and then were lost to follow up and we do not have information about their prostate cancer status. The remaining men who never developed the disease were followed for 10 years. Calculate the number of person-years of observation accrued by this population.
Solved
Show answers
More tips
- G Goods and services Don t Let Your Fridge Smell Bother You: How to Get Rid of Unpleasant Odors in Your Refrigerator...
- A Animals and plants What Do Terriers Eat?...
- F Food and Cooking Discover the Benefits and Properties of Dates...
- C Computers and Internet Dynamically Assigned IP Address: What Is It and How Does It Work?...
- S Style and Beauty How to Get Rid of Acne: Scientifically Proven Methods...
- H Health and Medicine Simple Ways to Lower Cholesterol in the Blood: Tips and Tricks...
- O Other How to Choose the Best Answer to Your Question on The Grand Question ?...
- L Leisure and Entertainment History of International Women s Day: When Did the Celebration of March 8th Begin?...
- S Style and Beauty Intimate Haircut: The Reasons, Popularity, and Risks...
- A Art and Culture When Will Eurovision 2011 Take Place?...
Answers on questions: Mathematics
- M Mathematics If the similarity ratio of two solids is 3:14, what is the ratio of their corresponding areas? What is the ratio of corresponding volumes?...
- M Mathematics What is 8x-2y=6 is slop-intercept form...
- M Mathematics Click the audio button to hear a number aloud then write the number as a decimal 2865000...
- M Mathematics This diagram is a scale drawing of a store. To the nearest 50 square feet, what is the area of the actual store? A. 2,350 square feet B. 2,400 square feet C. 2,450 square...
- M Mathematics Fsdewq22q14q244q422121424...
- M Mathematics There are 24 students in the class 8 are boys give your fraction in its simplest form?...
- M Mathematics 1 B A 1 Which of the coordinates is equal to cos(50)...
- M Mathematics 7. The copier produces 160 copies of a document in 4 minutes. What is the constant of proportionality that relates the number of copies made, y, to the number of minutes,...
- M Mathematics Write an expression to represent the phrase: x increased by 91...
- M Mathematics What relation is a doorstep to a doormat, What are the answers...
Ответ:
The number of person - year accrued by the population being observed is 1,210person-year.
Step-by-step explanation: Person-year is the calculation of the actual time a participant is at risk in the study,assuming that all participants participated in the study. Because some people will never be infected in a study and some will be infected at a particular point in time. This is why the person per time is necessary in the study. It is the sum of time spent on following up people that has not been affected by the disease in the study.
CALCULATING THE PERSON-YEAR
1) 100 persons are followed for 5years
2) 10 persons are followed for a year and then lost
3) The remaining were followed for 10years. The remaining are sample, after subtracting the 20 infected persons and the 10persons that were lost from the 100 persons, which was the initial sample. That means 70 persons were followed up for 10years.
Therefore;
100persons × 5years = 500 person-year
10persons × 1year = 10 person-year
70persons × 10years = 700person - year.
Therefore the sum of the person-year.
500+10+700 = 1,210 person-year
The number of person - year accrued by the population being observed is 1,210 person-year.
Ответ:
Q.1 360° Q.2 360°
Step-by-step explanation:
Q.1 let the third angle of the triangle be a
70°+40°+a=180(by angle sum property)
110°+a=180
a=180°-110°
a=70°
angle x=70°+x=180°(linear angle)
x=180°-70°
x=110°
angle z= 40°+z=180
z= 180°-40°
z=140°
angle y=a+y=180°
70°+y=+80°
y=180°-70°
y=110°
y+z+x=110° +110° +140°=360
Q.2 let the fourth angle of the quadrilateral be x
120°+70°+60°+ x=360° (by angle sum property)
250°+x=360°
x=360°-250°
x=110°
angle a=120°+a=180°(by linear angle)
a=180°-120°
a=60°
angle b=70°+b=180°
b=180°-70°
b=110°
angle c=x+c=180°
110° + c=180°
c=180°-110°
c=70°
angle d=60°+d=180°
d= 180° -60°
d=120°
a+b+ c+d=120°+110°+60°+70°=360°