Natural Hisotry Of Disease

Question 0

When does the preclinical phase begin in that natural history of disease?

Answer 0

Biological onset of disease

Pathologic evidence

Question 1

Prognosis

Answer 1

Prediction of probable cure & outcome of a disease

Likelihood of recovery from a disease

Question 2

When does the clinical phase begin in the natural history of the disease?

Answer 2

Medical care
Diagnosis
Treatment
Outcome

Question 3

What are five ways of expressing prognosis?

Answer 3

Case fatality rate
5 year survival rate
Observed survival rate
Median survival rate
Relative survival rate

Question 4

In the 5 methods, what is the most accurate method?

Answer 4

Relative survival rate

Question 5

Which prognosis method can we observe survival using life tables?

Answer 5

Observes survival rate

Question 6

Which prognosis method is an age-adjustment for survival rates?

Answer 6

Relative survival rate

Question 7

Which prognosis method is a measure of virulence?

Answer 7

Case fatality rate

Question 8

Which prognosis method allows for calculation of only half the study population?

Answer 8

Median survival rate

Question 9

Case fatality rate (CFR) formula

Answer 9

# of ppl who die from disease
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# of ppl w/disease

Question 10

What does a CFR of 80% mean?

Answer 10

80% of ppl died from the disease out of the amount of ppl that had it

Question 11

How do you calculate 5 year survival rate?

Answer 11

% of patients alive after 5yrs of treatment began

Question 12

Is it possible to calculate 2 year survival rate?

Answer 12

Yes

Question 13

What problem is associated with calculating 5 year survival and give example?

Answer 13

Screening, arbitrary, can miss ppl

Question 14

What does the 5 year survival rate of 90% mean?

Answer 14

Treatment is very effective

Question 15

What prognosis method improved upon the limitation of 5 year survival?

Answer 15

Observed survival

Question 16

What is the median survival time?

Answer 16

Length of time that half the study population survives

Question 17

Give two reasons why median survival time is preferred over mean survival time?

Answer 17

So data wouldn’t be screwed

Median is less effected

Question 18

How does it improve upon observed survival rates?

Answer 18

Calculates probability of surviving each year

When to expect it to go down

Question 19

Are survival data usually representative of the general pop? Why or why not?

Answer 19

No bc the data is often obtained from hospitals or other healthcare facilities
And patients may not be representative of the general pop