Question | Answer | Qustion | Answer | | | | | |
What is Incidence rate | Number of new cases in specified period/No. of persons at risk at the same period X 100. | What is morbidity rate | Rate of disease in a population at risk and refers to both incident and prevalent cases. | What is a Live birth | Child born with ANY sign of life. | what Perinatal Mortality Rate | # Still births + # deaths to infants <7 days old / # Still births + # live births. | |
| | Early fetal death = Death during first 20 weeks of gestation (spontaneous abortion). | Maternal Mortality Rate = Number of pregnancy related deaths/number of live births. | | | | | proportionate mortality rate (PMR) = deaths from cause /all deaths |
What is prevalence | number of persons with disease in population at a specific time. | | | | | | | |
| prevalence rate = all cases of a disease at a given at a given time/Total population at risk at that period x 100. | Intermediate fetal death = Death between 20 –28 weeks gestation. | | | | | | |
what is point prevalence=number of persons who had the disease at any time during the specified time interval. | Mortality rate = Rate of death in a population at risk and refers to incident cases only. | Late fetal death = After 28 weeks gestation
stillbirth. | | | | | | |
Period prevalence=persons who had the disease at any time during the specified time interval. | Incident density = Frequency of new events per person-time (per person – months, person – years). | Infant death = Death before 1st birthday. | | | | | | |
formula for prevalence = incidence x average (duration). | Crude death Rates = number of death rates (defined place and time period)/Mid period population (same place and time period) x 100 . | Crude birth rate = Number of live births / midperiod population. | | | | | | |
What is Risk = Proportion of persons unaffected at the beginning of the study period but undergo the risk event during the study period. | Standardized mortality ratio = Observed total events in the study group, divided by the expected number of events.
“expected” is based on standard population rates. | Infant mortality ratio = Number of deaths of infants / number of live births. | | | | | | |
Cohort = defined group of people studied over a period of time to determine the incidence of death disease or injury. | causes specific death rate = No. deaths due to a particular cause/Mid period population (same place and time period). | Neonatal mortality rate = Number of deaths of infants under 28 days of age/number of live births. | | | | | | |
What is Rate = frequency (number) of events in a defined time period divided by the average. population at risk. | cause fatality rate = deaths from a particular disease/Number of persons with disease. | Post-neonatal mortality rate = Number of deaths to infants between 28 & 365 days of age/number of live births. | | | | | | |