Crude Birth Rate, Crude Death Rate And Growth Rate

• Is the natality or childbirth per 1,000 mid-year population
• It excludes the still births
• It is unaffected by age-distribution
• Crude birth rate = (Number of liver births in a year/ Estimated mid year population) x 100
•  Is a measure of fertility
• CBR  world=19.9 per 1000 population (Max 51 Niger; Min 7 Monaco) 2012
• CBR India= 27.4 per 1000 population 2O14)

CRUDE DEATH RATE: 

• It is the simplest measure of mortality.
• It is defined as “the number of death (from all causes) per 1000 estimated mid-year population in one year, in a given place” 

• A rate comprises the following elements 

1.  Numerator
2.  Denominator
3.  Time specification
4.  Multiplier

1. Numerator

• Refers to the number of times an event (e.g. sickness, birth, death) has occured in a population, during a specified time period
•  Numerator is a component of the denominator in calculating a rate, but not in a ratio.

2.Denominator

• Denominator may be :

1. Related to population

• Mid year population → population estimated on first of July of an year
• Population at risk
• Person – time
• Person distance

2.Related to total events

• As in case fatality rate, denominator is total number of cases rather than total population. 
• CDR (World):8.37 per 1000 population (Max 22 Lesotho; Min 1 UAE) 2011
• CDR (lndia):7.0 per 1000 population 2014

Growth rate

• The growth rate is the rate at which a population is increasing (or decreasing) in a given year due to natural increase and net migration, expressed as a percentage of the base population.
• The growth rate takes into account all components of population growth: births, deaths, and migration.
• It equals ( births – deaths )+_ net migration/ total population X K ( 100).
• It should never be confused with the birth rate,  but it sometimes is.