Lecture 2.1: Comparing Populations- Standardisation Flashcards

1
Q

Point Prevalence Calculation

A

No. Cases at a Single Point in Time/No. Persons in Population at Same Time Point

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2
Q

Incidence Rate Calculation

A

No. New Cases During Time Period/(Total Population x Time)

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3
Q

How Are Prevalence and Incidence Measured? (2)

A
  • Routine Surveillance
  • Population Samples
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4
Q

What is Standardisation?

A

A set of techniques used to remove as much as possible the effects of differences in age or other confounding variables when comparing two or more populations

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5
Q

Target Population(s) Definition

A

The population(s) that we are interested in

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6
Q

Standard Population(s) Definition

A

The population that we use to construct comparisons with and between target populations

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7
Q

Crude Mortality Rate (per 1000)

A

(Total No. Deaths/Total Pop Size) x 1000

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8
Q

How to Choose a Standard Population?

A
  • Choose a population that is relevant to the target
    populations
  • If a relevant standard population doesn’t exist
    you can make one up by pooling data
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9
Q

What is Prevalence?

A

Refers to proportion of persons who have a condition at or during a particular time period

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10
Q

What is Incidence?

A

Refers to the proportion or rate of persons who develop a condition during a particular time period

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11
Q

Age-Specific Deaths (per 1000) Calculation

A

(Number of Deaths in Age Group/ Number of Persons in Age Group) x 1000

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12
Q

Directly Standardised Mortality Rate

A

[Ʃ(% of Pop in category x Age Specific Death Rate + % of Pop in category x Age Specific Death Rate +…)]/100

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13
Q

Absolute Expected Deaths (by age) Calculations

A

(Absolute Target Age’s Group Population Size x Standard Age-Specific Death Rate) /1000

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14
Q

Standardised Mortality Ratio Calculation

A

Observed Deaths/Expected Deaths

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