Basic measurements in epidemiology

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Information about Basic measurements in epidemiology

Published on October 13, 2016

Author: RizwanSa

Source: slideshare.net

1. Basic measurements in epidemiology Dr. S. A. Rizwan, M.D., Asst. Professor, Department of Community Medicine, VMCHRI, Madurai

2. Learning objectives • At the end of this lecture you sh be able • List the various tools used for measurement • List the various measures of death • List the various measures of disease 2

3. Recap • Define epidemiology • Uses of epidemiology 3

4. Measurements used in epidemiology • Measurement of mortality • Measurement of morbidity • Measurement of disability • Measurement of natality • Measurement of disease attributes • Measurement of health care services • Measurement of the risk factors • Measurement of demographic variables 4

5. TOOLS OF MEASUREMENT 5

6. Tools of measurement • Proportion • Rate • Ratio 6

7. Proportion • Usually expressed as a percentage % – Numerator (which is part of denominator) – Denominator – Multiplier – No time factor 7

8. Proportion – example What proportion of this class are Vijay fans? 8

9. Proportion – example What proportion of this class are Ajith fans? 9

10. Proportion – ‘real’ example • What proportion of the population is suffering from diabetes? 10

11. Rate Contains • Numerator (which is part of denominator) • Denominator • Multiplier • Time period • Usually expressed per 100 / per 1000 population • It has a time dimension, whereas a PROPORTION does not 11

12. Rate – example 12

13. Rate – example • Death rate =

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