Author: Ms Christa Maria Joel Moderator- Dr. Sowmya Bhat Department of Community Medicine Father Muller Medical College 3rd Year MBBS

1. Problem solving
exercise
Christa Maria Joel
Registration no: 12M5536
Moderator: Dr. Sowmya Bhat

2. A primary health center with 30000 population
gives the following data of 1 year.
Age group Number of women Number of live births in 1
year
15-24 2000 500
25-34 1800 250
35-44 1400 90
Total 5200 840
Calculate -
Crude birth rate
General fertility rate
Age specific fertility rate
Total fertility rate

3. Crude birth rate
 Simplest indicator of fertility.
 Number of live births per 1000 estimated mid year population in
a given area during a given year.
 Unsatisfactory measure of fertility because total population is not
exposed to child bearing.
 Does not give a true idea of fertility of a population.

4. CBR = 840 * 1000 / 30000 = 28 per thousand
population

5. General fertility rate
 Number of live births per 1000 women in the reproductive age
group, irrespective of their marital status in a given year.
 Better measure of fertility than crude birth rate because the
denominator is restricted to the number of women in child
bearing age, rather than the whole population.
 Major weakness- not all women in the denominator are
exposed to risk of child birth.

6. GFR = 840 * 1000 / 5200 = 161.538 per thousand females

7. Age specific fertility rate
 More precise measure of fertility.
 Number of live births in a year to 1000 women in any
specified age group.
 Throws light on fertility pattern.
 Sensitive indicators of family planning achievement.

8.  ASFR for ages 15-24 = 500 * 1000 / 2000 = 250 per thousand females
 ASFR for ages 25-34 = 250 * 1000 / 1800 = 138.89 per thousand females
 ASFR for ages 35-44 = 90 * 1000 / 1400 = 64.29 per thousand females

9. Total fertility rate
 Represents average number of children , a woman would
have if she were to pass through her reproductive years
bearing children at the same rates as the women now in
each age group.
 Measure gives approximate magnitude of completed family
size.

10. TFR = (250 + 138.89 + 64.29 ) * 10 / 1000 = 4.53 per
thousand females

11. THANK YOU