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evidence based dentistry > EBD Calculations > Flashcards

EBD Calculations Flashcards

1
Q

What is a risk?

A

This is the chance of outcome occurring/all outcomes

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2
Q

What term is this referring to?

Chance of outcome/all total outcomes

A

Risk

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3
Q

What is an odd?

A

This is the chance of outcome occurring/chance of outcome not occurring

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4
Q

What term is this:

Outcome occurring/outcome not occuring

A

Odd

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5
Q

What is a starting risk?

A

This is the risk of outcome without treatment (outcome pre tx/all outcomes)

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6
Q

What does this refer to?

Risk of outcome with no tx/all outcomes

A

Starting risk

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7
Q

What is modified risk?

A

This is the risk of outcome occuring with tx/all outcomes

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8
Q

What does this refer to?

Risk of outcome occuring with tx/all outcomes

A

risk of outcome occuring with tx/all outcomes

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9
Q

What is relative risk?

A

This is where we do diff/ov x 100

Probability of event occuring in exposed:non exposed group

Diff = ((outcome with tx - outcome with no tx)/outcome with tx)x100

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10
Q

What does this refer to?

probability of even occuring in exposed:non exposed group

A

Relative risk

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11
Q

What is absolute risk?

A

This is risk of outcome in exposed group - risk of outcome in non exposed group

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12
Q

What does this refer to?

Risk of outcome in exposed group - risk of outcome in non exposed group

A

Absolute risk

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13
Q

What can we do with ARD?

A

Work out number needed to treat (1/ARD)

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14
Q

What is number needed to treat?

A

1/ARD

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15
Q

What is risk ratio?

A

This is risk of outcome in tx group/risk of outcome in placebo group

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16
Q

What are the risk ratio values?

A

Risk ratio values =
RR= 1 = VND
RR>1 = BENEFIT

17
Q

What are Absolute risk values?

A

If O = value of no diff

benefit >1

18
Q

What is odds ratio?

A

Odds of outcome with tx/odds of outcome with no tx

first work out odds of tx/tx not working and then non tx

evidence based dentistry (3 decks)

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