Review Questions Unit 2

A newborn was delivered at 23 weeks of gestation. The birth weight was 450 grams, and no signs of life were observed after separation from the uterus. How should this case be classified?

Stillbirth

A newborn was delivered at 20 weeks of gestation. The birth weight was 520 grams, and no signs of life were observed after separation from the uterus. How should this case be classified?

Stillbirth

Which of the following statements correctly describes the criteria for stillbirth?

Absence of signs of life and at least one of the following: birth weight ≥ 500 grams or gestational age ≥ 22 weeks

Which of the following definitions best describes infant mortality?

The number of deaths of infants up to one year of age per 1,000 live births

Which period is defined as early neonatal mortality?

0–6 days after birth

During which stage do most infant mortality occur in developed countries?

Early neonatal period

In a certain year, a country recorded 120,000 live births and 480 infant deaths before age one. What is the Infant Mortality Rate (IMR)?

4 per 1,000 live births

In a particular country, 12,000 live births were recorded in one year. The mid-year population was 800,000. What is the Crude Birth Rate (CBR)?

15 births per 1,000 population

Which of the following indicators is considered more precise than the Crude Birth Rate because it refers only to women of reproductive age?

General Fertility Rate (GFR)

What does the Age-Specific Fertility Rate (ASFR) measure?

Number of births among women in a specific age group

What is the demographic meaning of a Total Fertility Rate (TFR) lower than 2.1 in a developed country?

The population is expected to decline in the long term

What is Life Expectancy at Birth?

The average number of years a newborn is expected to live assuming mortality rates remain constant

Why is life expectancy at birth strongly influenced by infant mortality?

Because infant mortality occurs at very young ages and therefore affects the average years of life

If life expectancy at age 65 is 20 years, what does it mean?

A person aged 65 is expected to live on average until age 85

Which of the following factors contributed significantly to the increase in life expectancy during the last century?

Decline in infant mortality

Which of the following statements describes inequality in life expectancy?

People with higher socioeconomic status live longer on average

What is the definition of live birth?

When there are immediate signs of life from the baby I.e spontaneous breathing, heartbeat, spontaneous muscle movement, umbilical cord pulsation. Birth weight or gestational age has no impact.

What is the definition of a miscarriage?

When it the baby doesn’t meet the minimum threshold of still birth category i.e. no signs of life detected, weight is less than 500g, gestational age is less than 22 weeks.

Infant Mortality Rate (IMR) Definition

The number of infant deaths under one year of age relative to the number of live births in the same population and time period.

Why IMR is a Broad Development Indicator

It reflects medical care quality (pregnancy, childbirth, 1st year) alongside social, economic, and environmental conditions.

Infant Mortality Rate (IMR) Formula

(Number of deaths under age 1 / Number of live births) x 1,000 (expressed per 1,000 live births).

Neonatal Mortality Rate (NMR) Timeframe

Deaths occurring during the first 28 days of life (days 0 to 27).

Neonatal Mortality Rate (NMR) Formula

(Number of deaths age 0–27 days / Number of live births) x 1,000.

Primary Influences on Neonatal Mortality

Factors closely surrounding birth: maternal health, course of pregnancy, and quality of delivery/newborn care.

Early Neonatal Mortality Rate Timeframe

Deaths occurring during days 0 to 6 of life.

Early Neonatal Mortality Rate Formula

(Number of deaths age 0–6 days / Number of live births) x 1,000.

Significance of the Early Neonatal Period

This is the stage where the vast majority of infant deaths occur.

Main Causes of Early Neonatal Mortality

Prematurity, low birth weight, severe congenital anomalies, respiratory distress, and delivery complications.

Late Neonatal Mortality Rate Timeframe

Deaths occurring from day 7 to day 27 of life.

Late Neonatal Mortality Rate Formula

(Number of deaths age 7–27 days / Number of live births) x 1,000.

Main Causes of Late Neonatal Mortality

Neonatal infections, complications of prematurity, congenital anomalies, and complications from medical treatments.

Post-Neonatal Mortality Rate Timeframe

Deaths occurring from 28 days of age until less than one year of age.

Post-Neonatal Mortality Rate Formula

(Number of deaths age 28 days to < 1 year / Number of live births) x 1,000.

Main Causes of Post-Neonatal Mortality

Sudden Infant Death Syndrome (SIDS), accidents, infections, environmental conditions, neglect, and chronic diseases.

Universal Denominator for Infant Mortality Measures

The number of live births in the same population and time period.

Mathematical Component of Neonatal Mortality

Neonatal mortality = Early neonatal mortality + Late neonatal mortality.

Mathematical Component of Infant Mortality

Infant mortality = Neonatal mortality + Post-neonatal mortality.

Biological and Medical Risk Factors

Prematurity, low birth weight, congenital anomalies, infections, and respiratory distress (most common in early neonatal period).

Maternal and Pregnancy Risk Factors

Very young or advanced maternal age, poor nutrition, chronic diseases, smoking during pregnancy, and inadequate prenatal care.

Environmental and Social Risk Factors

Low socioeconomic status, poor housing, low maternal education, poor healthcare access, and unsafe cultural practices (mostly impacts post-neonatal period).

Infant Mortality Pattern in Developed Countries

Most deaths happen in the neonatal period, primarily driven by prematurity and congenital anomalies.

Infant Mortality Pattern in Developing Countries

A larger proportion of deaths happen in the post-neonatal period, primarily driven by infections and malnutrition.

IMR Calculation Practice (120,000 live births, 480 deaths)

4 per 1,000 live births. Calculation: (480 / 120,000) x 1,000 = 4.

Fertility Definition

The number of live births that actually occur in a population (an actual outcome).

Fecundity Definition

The biological capability of a woman to conceive and give birth.

Live Birth Signs of Life

Spontaneous breathing, heartbeat, or voluntary muscle movement after separation from the mother.

Live Birth Death Nuance

An event is classified as a live birth if signs of life are present, even if the infant dies shortly after birth.

Crude Birth Rate (CBR) Definition

The number of live births in a year relative to the total population.

Crude Birth Rate (CBR) Formula

(Number of live births during the year / Mid-year population) x 1,000.

Why CBR is a "Crude" Measure

Its denominator includes people who cannot biologically give birth, such as men, children, and women outside reproductive age.

General Fertility Rate (GFR) Definition

The number of live births relative only to women of reproductive age.

Standard Reproductive Age Range

15 to 49 years of age.

General Fertility Rate (GFR) Formula

(Number of live births during the year / Number of women aged 15–49) x 1,000.

Age-Specific Fertility Rate (ASFR) Definition

The number of births among women within a specific, narrow age group.

Standard ASFR Age Cohorts

5-year intervals: 15–19, 20–24, 25–29, 30–34, 35–39, 40–44, and 45–49.

ASFR Public Health Utility

Allows researchers to identify peak childbearing ages and examine changing reproductive patterns over time.

Total Fertility Rate (TFR) Definition

The average number of children a woman is expected to have if current age-specific fertility rates remain constant throughout her reproductive years.

Total Fertility Rate (TFR) Formula

The sum of all Age-Specific Fertility Rates (ASFR) multiplied by the width of the age interval (usually 5).

Socioeconomic Factors Lowering Fertility

Higher levels of education among women and increased female participation in the labor force.

Socioeconomic Factors Raising Fertility

Younger age at marriage, traditional social norms, and supportive community structures.

Israel's Total Fertility Rate (TFR) Status

Unique among developed countries because its rate is exceptionally high, averaging approximately 3 children per woman.

Average TFR in Most Developed Countries

Often below 1.5 children per woman, which is below replacement level.

Israel Fertility Trends: Haredi Community

Characterized by particularly high fertility rates compared to the national average.

Israel Fertility Trends: General Jewish Population

Lower than the Haredi community, but still significantly higher than in most Western nations.

Israel Fertility Trends: Arab Population

Has declined significantly over recent decades and current fertility levels are now similar to the Jewish population.

Cultural/Policy Reasons for Israel's High Fertility

Strong social value of family, religious norms, supportive family policies, and high availability of maternal health services.

Public Health Utility of Fertility Indicators

Essential for structural planning of maternity wards, tipat chalav (mother-and-child) clinics, schools, and tracking health inequalities.

Demographic Meaning of TFR Lower Than 2.1

Indicates that a population is below replacement level and is expected to decline in the long term.

Life Expectancy Definition

The average number of years a person is expected to live at a given age, assuming current mortality rates remain constant.

Life Expectancy at Birth Definition

The average number of years a newborn is expected to live if mortality rates at the time of birth remain constant throughout life.

Most Sensitive Influence on Life Expectancy at Birth

Infant mortality rates heavily weight and influence this specific demographic metric.

Life Expectancy at a Specific Age Example

If life expectancy at age 65 is 20 years, the person is expected to live on average until age 85 (65 + 20).

How Life Expectancy is Calculated

Derived using age-specific mortality rates, which represent the mathematical probability of dying at each given age.

Global Life Expectancy Shift (20th Century to Today)

Rose significantly from approximately 40 years at the beginning of the 1900s to about 72 years today.

Historical Drivers of Increased Life Expectancy

Decline in infant mortality, sanitation improvements, medical advances, vaccinations, and better nutrition/living conditions.

Gender Gap in Life Expectancy

In Israel and most countries worldwide, women live longer than men on average.

Behavioral/Social Reasons for Gender Life Expectancy Gap

Higher smoking rates among men, greater occupational risks, and a higher tendency for risk-taking behaviors.

Biological Reasons for Gender Life Expectancy Gap

Inherent biological and hormonal differences between sexes that influence longevity.

Socioeconomic Status (SES) and Mortality

Central topic in social epidemiology showing individuals with higher SES and education levels live longer.

Israel's Global Life Expectancy Ranking

Exceptionally high compared to many Western countries, sitting well above the average for OECD countries.

Inequalities in Israeli Life Expectancy

Disparities exist between Jewish and Arab populations, high vs. low socioeconomic levels, and central vs. peripheral geographic regions.

The Haredi Life Expectancy Paradox in Israel

The ultra-Orthodox population has a relatively high life expectancy despite having a lower average socioeconomic status.

Healthy Life Expectancy (HALE)

A public health measure representing the average number of years a person is expected to live in good health, free from chronic disease.

Disability Adjusted Life Expectancy

A composite measure representing the number of years a person is expected to live while actively factoring in years lost to illness or disability.