CPHM: FORMULAS

Question 1

Absolute increase per year

Answer 1

Pt-Po/t

Question 2

Relative increase

Answer 2

Pt-Po/Po

Question 3

Sex composition

Answer 3

Sex ratio= number of males/number of females x1000

Question 4

Crude birth rate

Answer 4

number of live births/ midyear population x 1000

Question 5

General fertility rate

Answer 5

number of live births/ midyear population of women x1000
(15-44 yrs old)

Question 6

Crude death rate

Answer 6

number of deaths/ midyear population x1000

Question 7

Specific mortality rate

Answer 7

number of death in a specified group / midyear population of the same specified group x1000

Question 8

Cause of death rate

Answer 8

number of deaths from a specified cause / midyear population x1000

Question 9

Infant mortality rate

Answer 9

deaths under one year of age / number of live births x1000

Question 10

Maternal mortality rate

Answer 10

number of deaths due to pregnancy, delivery and puerperium / number of live births x1000

Question 11

Proportionate mortality rate

Answer 11

number of deaths from a particular cause / total deaths x100

Question 12

Swaroop’s Index

Answer 12

number of deaths among those 50 years and over / total deaths x100

Question 13

Case fatality rate

Answer 13

number of deaths from a specified cause / number of cases of the same disease x100

Question 14

Incidence rate

Answer 14

number of new cases of disease developing from a period of time / population at risk of developing the disease x100

Question 15

Prevalence rate

Answer 15

number of old and new cases of a disease / population examined x100