Homework Answers
A. The percentage of older men developed CHD ,regardless of their balding status is :
Total number of CHD present in older subjects is 850
Total number of older subjects is 8500
Percentage of older men developed CHD is 850/8500 × 100
= 10%
B. The percentage of younger men developed CHD ,regardless of their balding status is :
Total number of CHD present in younger subjects is 115
Total number of younger subjects is 11500
Percentage of younger men developed CHD is 115/11500 × 100
= 1%
C.Yes , from the calculation it appears that with age the risk for CHD increases .
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The investigator was concerned that the results might be confounded by age. She stratified the results,...
a. Calculate the relative risk of CHD associated with baldness in the stratum of older men....
a. Calculate the relative risk of CHD associated with baldness
in the stratum of older men.
b. Calculate the relative risk of CHD associated with baldness
in the stratum of younger men.
The investigator was concerned that the results might be confounded by age. She stratified the results, displaying them separately for the older subjects (aged 65 and over) and the younger subjects (aged 40-64). Examine the two tables below Results among older subjects: CHD Yes No Total Bald Hairy...
a. What proportion of the older men are bald? b. What proportion of the younger men...
a. What proportion of the older men are bald?
b. What proportion of the younger men are bald?
c. Does there appear to be an association between age and
baldness?
The investigator was concerned that the results might be confounded by age. She stratified the results, displaying them separately for the older subjects (aged 65 and over) and the younger subjects (aged 40-64). Examine the two tables below Results among older subjects: CHD Yes No Total Bald Hairy 100 900...
a. What proportion of the older men are bald? b. What proportion of the younger men...
a. What proportion of the older men are bald?
b. What proportion of the younger men are bald?
c. Does there appear to be an association between age and
baldness?
The investigator was concerned that the results might be confounded by age. She stratified the results, displaying them separately for the older subjects (aged 65 and over) and the younger subjects (aged 40-64). Examine the two tables below Results among older subjects: CHD Yes No Total Bald Hairy 100 900...
a. What is the relative risk of CHD associated with baldness? In one sentence, interpret this...
a. What is the relative risk of CHD associated with baldness? In
one sentence, interpret this relative risk.
b. Does this result suggest that baldness may be a cause of CHD?
Why or why not?
To determine whether baldness causes coronary heart disease (CHD) in men, a hypothetical cohor study was carried out. The epidemiologist in charge of the study recruited 10,000 bald men and 10,000 men with hair into the study and followed all of them for 10 years...
(a) What is the relative risk of CHD associated with baldness? In one sentence, interpret this...
(a) What is the relative risk of CHD associated with baldness?
In one sentence, interpret this relative risk. --> 4.08
What is b in this situation?
(b) Does this result suggest that baldness may be a
cause of CHD? Why or why not?
To determine whether baldness causes coronary heart disease (CHD) in men, a hypothetical cohor study was carried out. The epidemiologist in charge of the study recruited 10,000 bald men and 10,000 men with hair into the study and...
EXHIBIT C.1 Colorectal Cancer Incidence by Age Strata Age Cases Population Rate/100,000 < 1 2,141...
EXHIBIT C.1 Colorectal Cancer Incidence by Age Strata Age Cases Population Rate/100,000 < 1 2,141,127 o 8,559,824 0 10.353.968 o 10,039.911 26 10,844,290 97 10,881,353 223 10,922,914 510 9.936,086 900 10,173.758 40-44 1,8510,307,818 45-49 3.67811,072,321 50-54 6,67310,462,503 7.534 9,017.505 60-64 8,7407,430,412 65-69 9.4875.406,398 70-74 8,986 4,002,885 75-79 8,362 3.087.390 80-847,023 2,252,255 6,129 1,747.706 7,285 105,233.370 62,934 43.407,054 0 1-4 5-9 10-14 15-19 20-24 25-29 30-34 35-39 55-59 85+ 50 50+ Source: CDC (2013) 3. Calculate the incidence of colon cancer...
Indicate the one major type of limitation that is possible in each of the situations described...
Indicate the one major type of limitation that is possible in each of the situations described below. Choose from the following: selection bias, information bias, confounding, random error, limited generalizability or no error. Choose only one per example. A case-control study was conducted to determine whether lower socioeconomic status was associated with a higher risk of cervical cancer. The cases consisted of 250 women with cervical cancer who had been referred to Massachusetts General Hospital for treatment for cervical cancer. They were referred from...
question #24 313 7-1 Estimating a Population Proportion <p 174% sult from part (a)tothis 95% onfidence iterval for 5 subjects who she 45 sutycts given a placebo instead of OyContin: 1.93% <...
question #24
313 7-1 Estimating a Population Proportion <p 174% sult from part (a)tothis 95% onfidence iterval for 5 subjects who she 45 sutycts given a placebo instead of OyContin: 1.93% < ρ a. developed y When she was 9 years of age, Emily Rosa did a science fair experimem sed professional souch therapists to see if they could sense her energy fieldhe be tn select either her right hand or her left hand, and then she asked the therapist...
Please read and answer the following questions. 1. How was the sample selected ? We’re demographics...
Please read and answer the following questions. 1. How was the
sample selected ? We’re demographics collected ?
2. Is the sample representative of the target population? If
not how was the sample “improved “ to make the results more
reliable and valid?
3. What is the design of the study?
4. How were the human subjects protected ?
5. Were instruments used reliable and valid ? Did they measure
the phenomenon under the study( how do you know that...
Article Summary I Read the article below and provide feedback by writing a 2 page summary....
Article Summary I Read the article below and provide feedback by writing a 2 page summary. Please write in essay format (you may include the questions but the response should be in essay format) Must include the following information Title of the article Author(s) of the article Reference list (include the article itself and any other reference material such as another article that is cited in your summary). Use the reference list in the article to get information about another...
a. Calculate the relative risk of CHD associated with baldness
in the stratum of older men.
b. Calculate the relative risk of CHD associated with baldness
in the stratum of younger men.
The investigator was concerned that the results might be confounded by age. She stratified the results, displaying them separately for the older subjects (aged 65 and over) and the younger subjects (aged 40-64). Examine the two tables below Results among older subjects: CHD Yes No Total Bald Hairy...
a. What proportion of the older men are bald?
b. What proportion of the younger men are bald?
c. Does there appear to be an association between age and
baldness?
The investigator was concerned that the results might be confounded by age. She stratified the results, displaying them separately for the older subjects (aged 65 and over) and the younger subjects (aged 40-64). Examine the two tables below Results among older subjects: CHD Yes No Total Bald Hairy 100 900...
a. What proportion of the older men are bald?
b. What proportion of the younger men are bald?
c. Does there appear to be an association between age and
baldness?
The investigator was concerned that the results might be confounded by age. She stratified the results, displaying them separately for the older subjects (aged 65 and over) and the younger subjects (aged 40-64). Examine the two tables below Results among older subjects: CHD Yes No Total Bald Hairy 100 900...
a. What is the relative risk of CHD associated with baldness? In
one sentence, interpret this relative risk.
b. Does this result suggest that baldness may be a cause of CHD?
Why or why not?
To determine whether baldness causes coronary heart disease (CHD) in men, a hypothetical cohor study was carried out. The epidemiologist in charge of the study recruited 10,000 bald men and 10,000 men with hair into the study and followed all of them for 10 years...
(a) What is the relative risk of CHD associated with baldness?
In one sentence, interpret this relative risk. --> 4.08
What is b in this situation?
(b) Does this result suggest that baldness may be a
cause of CHD? Why or why not?
To determine whether baldness causes coronary heart disease (CHD) in men, a hypothetical cohor study was carried out. The epidemiologist in charge of the study recruited 10,000 bald men and 10,000 men with hair into the study and...
EXHIBIT C.1 Colorectal Cancer Incidence by Age Strata Age Cases Population Rate/100,000 < 1 2,141,127 o 8,559,824 0 10.353.968 o 10,039.911 26 10,844,290 97 10,881,353 223 10,922,914 510 9.936,086 900 10,173.758 40-44 1,8510,307,818 45-49 3.67811,072,321 50-54 6,67310,462,503 7.534 9,017.505 60-64 8,7407,430,412 65-69 9.4875.406,398 70-74 8,986 4,002,885 75-79 8,362 3.087.390 80-847,023 2,252,255 6,129 1,747.706 7,285 105,233.370 62,934 43.407,054 0 1-4 5-9 10-14 15-19 20-24 25-29 30-34 35-39 55-59 85+ 50 50+ Source: CDC (2013) 3. Calculate the incidence of colon cancer...
question #24
313 7-1 Estimating a Population Proportion <p 174% sult from part (a)tothis 95% onfidence iterval for 5 subjects who she 45 sutycts given a placebo instead of OyContin: 1.93% < ρ a. developed y When she was 9 years of age, Emily Rosa did a science fair experimem sed professional souch therapists to see if they could sense her energy fieldhe be tn select either her right hand or her left hand, and then she asked the therapist...
Please read and answer the following questions. 1. How was the
sample selected ? We’re demographics collected ?
2. Is the sample representative of the target population? If
not how was the sample “improved “ to make the results more
reliable and valid?
3. What is the design of the study?
4. How were the human subjects protected ?
5. Were instruments used reliable and valid ? Did they measure
the phenomenon under the study( how do you know that...
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