Epidemiology and Statistics: I
Dr Nicola Love
, This session
• Measures in epidemiology
– Rates, proportions, prevalence, incidence, attack rates, risks
• Cohort studies
• Cross-sectional studies
• Causation
,Descriptive studies - context in epidemiology
Epidemiology studies the occurrence of illness:
the frequency and distribution of diseases in the population
and their determinants
frequency and distribution:
who, when, where
determinants: why
, Counts
Number of cases
“we have 2 cases of tetanus”
On its own not very informative
Who is in the denominator ?
In what time period did they occur?
Dr Nicola Love
, This session
• Measures in epidemiology
– Rates, proportions, prevalence, incidence, attack rates, risks
• Cohort studies
• Cross-sectional studies
• Causation
,Descriptive studies - context in epidemiology
Epidemiology studies the occurrence of illness:
the frequency and distribution of diseases in the population
and their determinants
frequency and distribution:
who, when, where
determinants: why
, Counts
Number of cases
“we have 2 cases of tetanus”
On its own not very informative
Who is in the denominator ?
In what time period did they occur?
