Mortality Rates: Key Indicators and Influencing Factors

Every society leaves behind a number that quietly measures how well it cares for its people. That number is its mortality rate. Behind the statistic sits a much larger story about hospitals and clinics, about whether a newborn survives its first month, about whether a mother walks out of a delivery room alive. Mortality rates are not just demographic accounting. They are one of the clearest mirrors we have of public health, living conditions, and social progress. Understanding how mortality is measured, and what pushes it up or down, helps explain why some regions thrive while others struggle.

What mortality rates actually tell us 🔗

Mortality refers to death within a population over a given period, usually a year. On its own, a raw count of deaths means little, because a large country will naturally record more deaths than a small one. To compare fairly, demographers convert deaths into rates, typically expressed per 1,000 people or per 1,000 live births. These rates allow us to track progress over time and compare one region against another.

A falling mortality rate generally signals better healthcare, cleaner water, improved nutrition, and stronger disease control. A stubbornly high rate points to gaps in those same areas. This is why governments, the World Health Organization, and researchers treat mortality data as an early warning system for the health of a society. In India, this data is collected mainly through the Sample Registration System (SRS), a large demographic survey run by the Office of the Registrar General that fills the gaps left by incomplete civil registration of births and deaths.

The three key indicators of mortality 🔗

While dozens of mortality measures exist, three stand out because they capture different and important aspects of a population’s health.

Crude death rate (CDR) 🔗

Crude Death Rate is the simplest measure. It counts the total number of deaths in a year divided by the mid-year population, multiplied by 1,000. It is called “crude” because it makes no adjustment for age or sex; it simply weighs deaths against the total population. The CDR is estimated annually in India through the SRS.

The long-term decline in CDR is striking. From an estimated 27.4 per 1,000 around the time of independence, India’s crude death rate has fallen to roughly 6.4 per 1,000 in recent SRS reporting. The limitation of CDR is that it can be misleading on its own. A region with many elderly residents may show a higher death rate than a region with a younger population, even if its healthcare is superior. That is why CDR is best read alongside more specific indicators.

Infant mortality rate (IMR) 🔗

Infant Mortality Rate measures the number of deaths of children under one year of age per 1,000 live births. It is one of the most sensitive indicators of a society’s overall health, because an infant’s survival depends on the combined quality of maternal health, nutrition, sanitation, and access to care. When any of these falter, infants are usually the first to suffer.

India’s IMR has fallen sharply over the decades. According to SRS data, the IMR stood at 25 deaths per 1,000 live births in 2023, down from around 1.7 million infant deaths recorded in 2001. Government figures show the IMR declined from 39 in 2014 to 27 per 1,000 live births by 2021. Progress has been real, yet the first week of life remains the period of highest risk, and rural and poorer states continue to report higher rates than the national average.

Maternal mortality rate (MMR) 🔗

Maternal Mortality Ratio counts the number of women who die from pregnancy-related causes, during pregnancy or within 42 days of its end, per 100,000 live births. It reflects the quality of maternal healthcare, the availability of skilled birth attendants, and how quickly emergencies are handled.

India has made notable gains here too. The maternal mortality ratio fell from 130 per 100,000 live births in 2014-16 to 93 in 2019-21. One major driver has been the rise in supervised deliveries; the share of births attended by skilled health staff reached about 89% in 2021. Each of these three indicators tells part of the story, and together they give a fuller picture than any single number could.

What drives mortality up or down 🔗

Mortality is not random. It responds to a set of identifiable factors, most of which can be influenced through policy and investment. Four stand out.

Access to healthcare 🔗

The single most powerful factor is access to quality healthcare. A functioning health system prevents and treats the conditions that lead to most deaths, from infections to childbirth complications. Where infrastructure is weak, people die from causes that are easily preventable elsewhere. The challenge is often one of distribution rather than averages. Health outcomes vary sharply across regions and income groups, with rural and lower-income communities facing the greatest shortfalls in doctors, hospitals, and emergency services.

Nutrition 🔗

Good nutrition is a frontline defence against death, especially for children. Malnutrition weakens the immune system, leaving the body unable to fight off infections that a well-nourished person would survive. Undernutrition contributes to a large share of child deaths worldwide, often by making common illnesses far more dangerous. Poor maternal nutrition during pregnancy and inadequate feeding after birth raise the risk of low birth weight, which in turn makes infants vulnerable to infection and breathing difficulties.

Sanitation and clean water 🔗

Clean water and proper waste disposal break the chain of waterborne diseases such as diarrhoea, which remains a leading killer of young children. Inadequate sanitation spreads infections quickly, particularly in crowded settlements. Investments in toilets, drainage, and safe drinking water have a direct effect on survival. Recognising this link, the Swachh Bharat Mission, launched in 2014, aimed at universal sanitation coverage and the elimination of open defecation, an effort that supports lower mortality alongside its hygiene goals.

Disease control and immunisation 🔗

Controlling infectious disease, mainly through vaccination, has been one of the most effective ways to cut mortality in history. Immunisation protects against illnesses like measles, polio, tetanus, and whooping cough that once killed large numbers of children. Timely vaccination, combined with better hygiene, sharply reduces deaths from preventable conditions. Beyond vaccines, surveillance programmes that detect and contain outbreaks of tuberculosis, malaria, and emerging infections keep mortality from spiking during epidemics.

How mortality is being reduced 🔗

The decline in mortality across much of the world is not accidental. It is the result of sustained, coordinated effort by international agencies and national governments working together.

Global efforts by WHO and UNICEF 🔗

International organisations have driven some of the largest gains in survival, particularly in developing nations. UNICEF and the World Health Organization have long focused on child survival through immunisation, oral rehydration therapy for diarrhoea, breastfeeding promotion, and growth monitoring. The scale of vaccination’s impact is enormous: global immunisation programmes are credited with preventing well over 150 million deaths in their first five decades, most of them among children under five.

These efforts are now anchored in the United Nations Sustainable Development Goals. SDG Target 3.2 commits countries to ending preventable deaths of newborns and children under five, aiming to bring the under-five mortality rate down to at least 25 per 1,000 live births. Globally, the under-five mortality rate has fallen by roughly 60% since 1990, although several million young children still die each year, mostly from preventable causes.

National programmes 🔗

National initiatives translate these global goals into local action. India’s flagship public health effort, the National Health Mission, has expanded maternal and child health services, supported institutional deliveries, and strengthened rural healthcare. Insurance schemes that cover hospitalisation costs for poorer families have widened access to treatment that was once out of reach. Nutrition programmes targeting mothers and young children tackle the malnutrition that underlies so many child deaths.

The combined effect of these measures is visible in the numbers. India’s average life expectancy has climbed to around 70.8 years, a milestone unimaginable a few generations ago. Yet the work is unfinished. The same data that records progress also exposes persistent gaps between rich and poor regions, between urban and rural areas, and between social groups. Lower averages can hide pockets where mortality remains dangerously high, which is why targeted, equity-focused interventions matter as much as national averages.

What do you think? If a single number like the infant mortality rate reflects so many underlying conditions, which factor, healthcare access, nutrition, sanitation, or disease control, do you believe deserves the greatest investment in your own region? And how might reducing the gap between a country’s wealthiest and poorest communities change the national mortality figures we so often celebrate?

References

1. https://www.dataforindia.com/crs-srs-explainer/
2. https://www.data.gov.in/catalog/crude-death-rate-india-0
3. https://www.dataforindia.com/infant-mortality/
4. https://www.pib.gov.in/PressReleasePage.aspx?PRID=2128024
5. https://ourworldindata.org/profile/health/india
6. https://pmc.ncbi.nlm.nih.gov/articles/PMC3093249/
7. https://www.cry.org/blog/causes-of-infant-mortality-rate-in-india/
8. https://www.orfonline.org/expert-speak/enhancing-population-health-india-s-policies-and-programmes
9. https://data.unicef.org/country/ind/