Lecture 2.1: Descriptive Epidemiology

Question 1

What is Epidemiology?

Answer 1

The study of the distribution and determinants of health related states or events in specified populations, and the application of this study to control of health problems

Question 2

Categorical (Discrete) Data

Answer 2

• Can be divided into group
• Nominal categorise data, no numerical relationship
• Ordered (ordinal) ranking categories
• Interval distance between measures on a scale has meaning

Question 3

Continuous Data

Answer 3

• Can take any value
• Interval distance between measures on a scale has meaning
• Ratio distance and ratio between measurements are defined

Question 4

What Frequency Distribution Graph is used for Continuous Data?

Answer 4

Histogram

Question 5

What Frequency Distribution Graph is used for Discrete Data?

Answer 5

Bar Chart

Question 6

Summarising Frequency Distribution: Shapes

Answer 6

• Unimodal or Bimodal
• Symmetrical or Skewed
• Large Gaps or Outliers

Question 7

Summarising Frequency Distribution: Location or Central Tendency

Answer 7

• Mode
• Median
• Mean
• Range

Question 8

Summarising Frequency Distribution: Spread

Answer 8

• Interquartile Range (IQR)
• Standard deviation (SD)

Question 9

Measures of Disease Frequency: Point Prevalence

Answer 9

Point Prevalence= No.cases in defined population at one point in time/No.persons in a defined population at the same point in time

Question 10

CAGE Questionnaire (4)

Answer 10

• Have you ever felt you should CUT down your drinking?
• Have people ANNOYED you by criticising your drinking?
• Have you ever felt bad or GUILTY about your drinking?
• Have you ever had a drink first think in the morning to steady your nerves
or get rid of a hangover (EYE- opener)?

Question 11

What are the 2 other questionnaires for alcohol dependence testing?

Answer 11

AUDIT-C
FAST