Veterinary Epidemiology and Zoonosis

EXPRESSION OF PROPORTION AND RATES

• They are expressed in three forms
  • Crude measures: Expression of the amount of disease occurrence and death in a population as whole.
  • Specific measures: Expression of the disease occurrence in specific categories of the population.
  • Example, age specific disease occurrence, breed specific disease occurrence, cause specific disease occurrence etc.
  • Adjusted measures (standardised measures): Adjustment of confounding variables which are similarly distributed in two study population.