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WorksheetsBiostatistics Online Quiz 3
Total questions: 20
Worksheet time: 15mins
The Crude Death Rate (CDR) is defined as:
Number of deaths in a year ÷ mid-year population × 1,000
Number of deaths in a year ÷ total live births × 1,000
Number of deaths from a specific cause ÷ mid-year population × 1,000
Number of maternal deaths ÷ total births × 100,000
The main limitation of Crude Death Rate is that it:
Cannot be expressed per 1,000 population
Ignores the size of the mid-year population
Does not account for population composition such as age and sex
Only applies to specific causes of death
Which indicator specifically measures deaths among a defined subgroup (e.g., females aged 15–49)?
Crude Death Rate
Specific Mortality Rate
Proportional Mortality Rate
Case Fatality Rate
The Cause of Death Rate is best used for:
Assessing total mortality burden of a population
Monitoring distribution of deaths due to specific diseases
Measuring exposure to risk factors
Comparing infant vs maternal deaths
The Infant Mortality Rate (IMR) is calculated as:
Deaths of children under 5 ÷ mid-year population × 1,000
Deaths of infants under 1 year ÷ live births × 1,000
Deaths of neonates under 28 days ÷ live births × 1,000
Deaths of infants 28–364 days ÷ mid-year population × 1,000
Which indicator is most sensitive to the quality of prenatal and delivery care?
Post-neonatal mortality rate
Crude death rate
Neonatal mortality rate
Maternal mortality rate
The Post-neonatal mortality rate includes deaths of infants:
From birth to 1 year
Less than 28 days old
Between 28 and 364 days old
Above 1 year
The Maternal Mortality Rate (MMR) uses which denominator?
Mid-year population
Number of live births
Total female population of reproductive age
Pregnant women at risk
Which of the following has the largest multiplier in its standard formula?
Crude death rate
Infant mortality rate
Neonatal mortality rate
Maternal mortality rate
The Proportional Mortality Rate (PMR) is calculated as:
Deaths due to a cause ÷ total deaths × 100
Deaths due to a cause ÷ mid-year population × 1,000
Infant deaths ÷ total live births × 1,000
Total deaths ÷ mid-year population × 1,000
If 20 out of 200 patients with Disease A died within 30 days, the Case Fatality Rate (CFR) is:
5%
10%
15%
20%
Which mortality measure best reflects disease severity?
Crude death rate
Infant mortality rate
Case fatality rate
Maternal mortality rate
Prevalence is defined as:
Number of existing cases ÷ population at risk
Number of new cases ÷ population at risk
Deaths ÷ mid-year population
Deaths ÷ live births
Incidence rate differs from prevalence because it:
Includes all cases (old + new)
Considers only new cases over time
Uses deaths instead of cases
Always produces higher values
Which indicator is often referred to as a measure of risk of developing disease?
Prevalence
Incidence
Crude death rate
Proportional mortality rate
An epidemiologist wants to compare mortality between two populations with different age structures. Which rate is most appropriate?
Crude death rate
Cause-specific death rate
Age-specific death rate
Standardized mortality rate
Which mortality measure is most sensitive to postnatal environmental conditions (nutrition, infections)?
Neonatal mortality rate
Post-neonatal mortality rate
Infant mortality rate
Maternal mortality rate
Which of the following is a morbidity indicator?
Case fatality rate
Prevalence rate
Crude death rate
Maternal mortality rate
The study of population size, distribution, and structure is known as:
Epidemiology
Demography
Vital Statistics
Biostatistics
Population estimation methods are essential because:
Mortality indicators do not require denominators
Census data are always sufficient
Accurate denominators are needed to calculate health rates
They replace the need for vital statistics
