Question

The following two tables were provided to you as part of this week’s lecture, part 2....

The following two tables were provided to you as part of this week’s lecture, part 2. In each table:

  • Disease + means that a patient had a disease, as measured by a “gold standard” assessment

  • Disease – means that the patient did not have a disease, as measured by the gold standard

  • Test + means that the patient was classified as being positive for the disease according to a new test

  • Test – means that the patient was classified as being negative for the disease according to a new test

Table 1

Disease +

Disease -

Total

Test +

160

360

520

Test -

40

1440

1480

Total

200

1800

2000

Table 2

Disease +

Disease -

Total

Test +

144

36

180

Test -

16

324

340

Total

160

360

520


Task 1: Using the measures described in Part 2 of the lecture (sensitivity, specificity, validity, and yield), describe the accuracy of the test to detect the presence of disease for the data described in Tables 1 and 2.  


Homework Answers

Answer #1

The sensitivity of a test is also called the true positive rate (TPR) and is the proportion of samples that are genuinely positive that give a positive result using the test in question. For example, a test that correctly identifies all positive samples in a panel is very sensitive.Hence the test given is not sensitive and all the positive results will not be reliable.

Specificity relates to the test's ability to correctly reject healthy patients without a condition.Specificity of a test is the proportion of healthy patients known not to have the disease, who will test negative for it.So the test has specificity.

Validity is the extent to which a concept, conclusion or measurement is well-founded and likely corresponds accurately to the real world.

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A patient is classified as having gestational diabetes if their average glucose level is above 140...
A patient is classified as having gestational diabetes if their average glucose level is above 140 milligrams per deciliter (mg/dl) one hour after a sugary drink is ingested. Rebecca's doctor is concerned that she may suffer from gestational diabetes. There is variation both in the actual glucose level and in the blood test that measures the level. Rebecca's measured glucose level one hour after ingesting the sugary drink varies according to the Normal distribution with μ=140 mg/dl and σ=1 mg/dl,...
To complete this Individual Preparation assignment, answer the following questions related to this week’s two cases....
To complete this Individual Preparation assignment, answer the following questions related to this week’s two cases. Each answer should be no more than 1-2 sentences. 1. According to their MELD scores, which patient is the worst-off (in the most need), and which patient can wait the longest for a transplant? Explain. 2. Given the criteria for assessing post-transplant success, such as the patient’s lifestyle choices and support system, which patient has the highest likelihood of success, and which patient has...
1) Describe an example of each of the following that may be found of your kitchen:...
1) Describe an example of each of the following that may be found of your kitchen: Explain how your choice falls into this category, and if there is a chemical name or symbol for it, provide that as well. Provide a photo of your example with your ID card in it. a) a compound b) a heterogeneous mixture c) an element (symbol) Moving to the Caves… Lechuguilla Caves specifically. Check out this picture of crystals of gypsum left behind in...