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10.2: Most Common Causes of Death

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    The World:

    The most recent statistics analyzed by the World Health Organization were in 2019 (WHO, 2020). The top 10 causes of death accounted for 55% of the 55.4 million deaths worldwide, and non-communicable deaths; that is, those not passed from person-to-person, were responsible for the majority of deaths (see Figure \(\PageIndex{1}\). The three most common noncommunicable diseases were heart disease, stroke, and COPD. Tobacco use is attributed as one of the top killers and is often the hidden cause behind many of the diseases that result in death, such as heart disease and chronic lung diseases. Neonatal conditions, which include birth asphyxia and birth trauma, neonatal sepsis and infections, and preterm birth complications are the fifth highest cause.

    Graph of the 10 most common worldwide causes of death in 2000 and 2019. From most to least common, these are ischaemic heart disease, stroke, chronic pulmonary obstructive disease, lower respiratory infections, neonatal conditions, trachea, bronchus, or lung cancers, Alzheimer's disease and other dementias, diarrhoeal diseases, diabetes mellitus, and kidney diseases.
    Figure \(\PageIndex{1}\). Worldwide causes of death in 2000 and 2019. Image source.

    These statistics hide the differences in the causes of death among high versus low income nations. In high-income countries, defined as havi)ng a per capita annual income of $12,696 or more, 70% of deaths are among people aged 70 and older. Only 1% of deaths occur in children under 15 years of age. People predominantly die of chronic diseases, such as cardiovascular disease, cancers, dementia, or diabetes. Lower respiratory infections remain the only leading infectious cause of death in such nations. In contrast, in low-income countries, defined as having a per capita annual income of $1045 or less, almost 40% of deaths are among children under age 15, and only 20% of deaths are among people aged 70 years and older. People predominantly die of infectious diseases such as lower respiratory infections, HIV/AIDS, diarrheal diseases, malaria and tuberculosis. These account for almost one third of all deaths in these countries. Complications of childbirth due to prematurity, birth asphyxia, and birth trauma are among the leading causes of death for newborns and infants in the poorest of nations (WHO, 2018; WHO, 2020).

    The United States:

    In 1900, the most common causes of death were infectious diseases, which brought death quickly. Today, the most common causes of death are chronic diseases in which a slow and steady decline in health ultimately results in death. However, COVID-19, an infectious disease, was the third most common reason for death in 2021 in addition to heart disease and cancer (see Figure \(\PageIndex{2}\), Ahmad et al., 2021).

    Graph of the 10 most common causes of death in America in 2020. From most to least common, they are heart disease, cancer, COVID-19, unintentional injury, strokes, chronic lower respiratory disease, Alzheimer's disease, diabetes, influenza and pneumonia, and kidney disease.
    Figure \(\PageIndex{2}\). Top ten causes of death in America in 2020. Image source.

    COVID-19: Impact on Death and Dying

    The World:

    As of July 4, 2022, 6.34 million people in the world died from the COVID-19 virus (John Hopkins University, 2022). Figure \(\PageIndex{3}\) presents the number of deaths for the world, United States, and select regions from January 22, 2020 through July 4, 2022.

    Graph of the cumulative confirmed COVID-19 deaths in the world, Europe, Asia, South America, the United States, Mexico, and Africa, from January 22, 2020 to July 4, 2022.
    Figure \(\PageIndex{3}\). Worldwide COVID-19 deaths as of July 4, 2022.

    Areas with high numbers of deaths include Europe (1.86 million), Asia (1.45 million), South America (1.31 million) and the United States (1.02 million), while fewer deaths were registered in Mexico (325,790 deaths) and Africa (255,120 deaths).

    Worldwide Excess Mortality:

    Estimates from the World Health Organization (2022) indicate that the full death toll associated directly or indirectly with the COVID-19 pandemic, described as excess mortality, between 1 January 2020 and 31 December 2021 was approximately 14.91 million (range 13.3 million to 16.6 million). Excess mortality is calculated as the difference between the number of deaths that have occurred and the number that would be expected in the absence of the pandemic based on data from earlier years. Excess mortality includes deaths associated with COVID-19 directly (due to the disease) or indirectly, due to the pandemic's impact on health systems and society. For example, these include deaths attributable to other health conditions for which people were unable to access prevention and/or treatment because health systems were dealing primarily with the pandemic. The excess mortality represented 9.49 million more deaths than those globally reported as directly attributable to COVID-19. Twenty countries (including the United States), which represent approximately 50% of the global population, accounted for over 80% of the estimated global excess mortality during the 24-month period.

    The United States:

    As indicated above, as of July 4, 2022, the official COVID-19 deaths in the United States stood at 1.02 million. The U.S. officially reached one million deaths from COVID-19 on May 17, 2022. However, due to flaws in the data tracking and reporting systems, the number of fatalities on that date was likely much higher, according to the Johns Hopkins Center for Health Security (Donovan, 2022). Approximately 350,000 COVID-19 deaths occurred in 2020, 475,000 deaths in 2021, and 175,000 during the beginning of 2022. Of those who died, 75% were 65 and older, and more men than women died. Citizens who were Black, Hispanic, Pacific Islander and Native American suffered disproportionately compared to other groups. The nation's three largest states, that is, California, Texas, and Florida, recorded the most number of deaths. However, based on a per-capita basis, Mississippi, Arizona, and Oklahoma experienced the most deaths per 100,000 residents, while Hawaii and Vermont reported the lowest number per capita.

    In 2020, the first deaths from COVID-19 occurred, and these additional 350,000 deaths resulted in approximately 3.4 million total American deaths, which was a record number (Stobbe, 2021). The high numbers of deaths in 2020 was also due to COVID-19 being a contributing cause of death for an estimated 377,883 deaths (Ahmad et al., 2021). In 2020, COVID-19 became the third leading cause of death behind heart disease and cancer (see Figure \(\PageIndex{4}\)).

    Graphic describing provisional numbers of deaths for the 3 leading causes of death in the U.S. in 2020. Heart disease was the most common, with 690,000 deaths, followed by cancer with 598,000 deaths and COVID-19 with 345,000 deaths.
    Figure \(\PageIndex{4}\). The 3 leading causes of death in the U.S. in 2020. Image source.

    As previously indicated, other causes of death also increased during 2020 (Stobbe, 2021). These included diabetes, Alzheimer's disease, Parkinson's disease, chronic liver disease, stroke, high blood pressure, kidney disease, influenza/pneumonia and unintentional injuries. Cancer rates declined in 2020, but researchers believe that those with cancer actually died due to COVID-19. Table \(\PageIndex{1}\) lists the main causes of death in 2020 and compares them to those of previous years.

    Table \(\PageIndex{1}\). Number of Deaths for Leading Causes of Death, U.S., 2015–2020a.
    No. of deaths by year
    Causes of death 2015 2016 2017 2018 2019 2020
    Total deaths 2,712,630 2,744,248 2,813,503 2,839,205 2,854,838 3,358,814
    Heart disease 633,842 635,260 647,457 655,381 659,041 690,882
    Cancer 595,930 598,038 599,108 599,274 599,601 598,932
    COVID-19b           345,323
    Unintentional injuries 146,571 161,374 169,936 167,127 173,040 192,176
    Stroke 140,323 142,142 146,383 147,810 150,005 159,050
    Chronic lower respiratory diseases 155,041 154,596 160,201 159,486 156,979 151,637
    Alzheimer's disease 110,561 116,103 121,404 122,019 121,499 133,382
    Diabetes 79,535 80,058 83,564 84,946 87,647 101,106
    Influenza and pneumonia 57,062 51,537 55,672 59,120 49,783 53,495
    Kidney disease 49,959 50,046 50,633 51,386 51,565 52,260
    Suicide 44,193 44,965 47,173 48,344 47,511 44,834
    aLeading causes are classified according to underlying cause and presented according to the number of deaths among US residents. For more information, see the article by Heron. Source: National Center for Health Statistics. National Vital Statistics System: mortality statistics (http://www.cdc.gov/nchs/deaths.htm). Data for 2015–2019 are final; data for 2020 are provisional.
    Deaths with confirmed or presumed COVID-19, coded to International Statistical Classification of Diseases and Related Health Problems, Tenth Revision code U07.1 as the underlying cause of death.

    Although the increased rate of deaths in 2020 was not all directly attributed to COVID-19, researchers believe that the excess mortality can be explained by ill patients not seeking treatment for their conditions because they feared becoming infected with the virus (Stobbe, 2021). As the hospitalization rates for COVID-19 increased, patients going to emergency rooms with symptoms of heart attacks and strokes decreased. Other factors associated with the virus and stay-at-home measures contributed to the higher death rates. These included patients not caring for themselves by not exercising, not taking prescribed medication, not managing stress, gaining weight, losing jobs, and losing health insurance. Overall, 25 states experienced more deaths than births in 2021, while historically the majority of states have more births than deaths.

    Mortality Risk Based on Age:

    According to a meta-analysis of representative samples from the U.S. and other nations, the COVID-19 virus poses a mortality risk for middle-age and elderly adults (Levin et al., 2020). The mortality risk for those infected with COVID-19 by age include:

    • 0.002% at age
    • 0.01% at age 25
    • 0.4% at age 55
    • 1.4% at age 65
    • 4.6% at age 75
    • 15% at age 85
    • exceeds 25% at ages 90+

    Nursing Home Residents:

    As can be seen in the above percentages, those in late adulthood suffer the greatest deaths from COVID-19, especially those older than 85 (CDC, 2021). Older adults are more likely to have underlying health conditions that make them more susceptible to illness, and they are more likely to reside in nursing homes that were especially vulnerable to the pandemic. As of April 2021, more than 131,000 nursing home residents in the United States died from COVID-19, making up nearly a quarter of all U.S. deaths from the pandemic (Chen et al., 2021). As of January 30, 2022, more than 201,000 long-term care facility residents and staff died since the beginning of the pandemic (Chidambaram, 2022). These elevated rates can be attributed to the highly transmissible nature of the Omicron variant, the large number of people intermingling in long-term care settings, and the high-risk status of those who reside in nursing homes.

    Enforcement of pandemic protocols in the long-term care industry was deemed too lax by many watchdog groups, even though federal regulators issued fines to 3,400 nursing home for COVID-19 violations. Fines were given for the incorrect use of mask, gowns and other personal protective equipment, lack of following quarantine or isolation protocols, not enforcing social distancing, and not separating those residents testing positive for the virus. The increased susceptibility for older adults and the above violations contributed to the higher death rates for those in nursing homes (Chen et al., 2021).

    Pre-COVID Deaths:

    Before COVID-19, the causes of death varied by age (see Figure \(\PageIndex{5}\) and \(\PageIndex{6}\), Heron, 2018). Prior to age 1, SIDS, congenital problems, and other birth complications are the largest contributors to infant mortality. Accidents, known as unintentional injury, become the leading cause of death throughout childhood and into middle adulthood. In later middle adulthood and late adulthood heart disease, cancer and other medical conditions become the leading killers.

    One pie chart shows the most common causes of death in ages 1 through 9, with 31.3% unintentional injuries, 12.6% cancer, 9.7% congenital malformations, 7.3% homicide, 3.0% heart disease, 2.3% influenza and pneumonia, 1.8% CLRD, 1.7% septicemia, 1.4% stroke, 1.2% benign neoplasms, and 27.5% other. A second pie chart shows the most common causes of death in ages 10 through 24 as 41.4% unintentional injuries, 17.3% suicide, 14.9% homicide, 5.2% cancer, 3.0% heart disease, 1.5% congenital malformations, 0.8% CLRD, 0.6% influenza and pneumonia, 0.6% diabetes, 0.6% stroke, and 14.0% other..
    Figure \(\PageIndex{5}\). Major causes of death in the U.S. in 2016, ages 1 to 24. Image source (p. 11).
    A pie chart for causes of deaths in ages 25 to 44 shows 33.2% unintentional injuries, 10.9% cancer, 10.8% suicide, 6.5% homicide, 2.8% chronic liver disease and cirrhosis, 2.1% diabetes, 1.8% stroke, 1.1% HIV disease, 1.0% influenza and pneumonia, and 19.8% other causes. A pie chart for causes of deaths for ages 45 to 64 shows 29.2% cancer, 20.9% heart disease, 8.4% unintentional injuries, 4.1% CLRD, 4.0% chronic liver disease and cirrhosis, 3.8% diabetes, 3.3% stroke, 3.0% suicide, 1.6% septicemia, 1.4% kidney disease, and 20.4% other causes. A pie chart of causes of deaths for ages 65 and over shows 25.3% heart disease, 21.1% cancer, 6.5% CLRD, 6.1% stroke, 5.7% Alzheimer's disease, 2.8% diabetes, 2.7% unintentional injuries, 2.1% influenza and pneumonia, 2.1% kidney disease, 1.5% septicemia, and 24.1% other causes. A pie chart for causes of deaths for ages 85 and over shows 28.9% heart disease, 12.1% cancer, 9.1% Alzheimer's disease, 7.3% stroke, 5.1% CLRD, 2.7% unintentional injuries, 2.5% influenza and pneumonia, 2.0% kidney disease, 2.0% diabetes, 1.7% hypertension, and 26.7% other causes. CLRD is identified as chronic lower respiratory disease.
    Figure \(\PageIndex{6}\). Major causes of death in the U.S. in 2016, ages 25 to 85+. Image source (p. 11).

    Chapters 8 and 9 discussed the chronic conditions that are associated with dying at later stages in life. However, suicides and drug overdoses are currently claiming lives throughout the lifespan, and consequently will be discussed next.

    Suicide

    According to the latest research from the CDC (Garnett et al., 2022), the suicide rate increased 30% between 2000 and 2020. However, there was a 5% decline from the peak of 14.2 per 100,000 in 2018 to 13.5 per 100,000 in 2020. In the United States, suicide is the 12th leading cause of death overall, but it ranks as the 2nd leading cause of death for those aged 10–34 and the 5th leading cause for those aged 35–54. In total, 45,855 people died by suicide in 2020, which was 3% lower than 2019 when 47,511 people died by suicide (Curtin & Hedegaard, 2021). Suicide rates for females in all race and Hispanic-origin groups declined between 2019 and 2020, while rates declined for non-Hispanic white and non-Hispanic Asian males, but increased for non-Hispanic black, non-Hispanic American Indian or Alaska Native, and Hispanic males. Males have consistently demonstrated higher rates of suicide as they typically experience higher rates of substance use disorders, do not seek out mental health treatment, and use more lethal means. However, females also respond to the stress in their lives through self-harm, substance abuse, and risk taking behaviors (Healy, 2019).

    Suicide Rates and Gender

    Graph of suicide rate per 100,000 standard population in the U.S. between 2000 and 2020, showing data for male, female, and total rates.
    Figure \(\PageIndex{7}\). Age-adjusted suicide rates by sex, U.S., 2000–2020. Image source.

    For males, the rate increased from 17.7 per 100,000 males in 2000 to 22.8 per 100,000 in 2018, but then declined to 22.0 per 100,000 in 2020. For females, the rate increased from 4.0 per 100,000 females in 2000 to 6.2 per 100,000 in 2018, but then dropped to 5.5 per 100,000 in 2020 (see Figure \(\PageIndex{7}\)). By ages, suicide rates for males aged 75 and older were the highest. From 2018 to 2020, suicide rates decreased in males aged 45–74, while rates increased for males aged 15–44. Female suicide rates declined for all groups over age 25, but increased for those aged 10–24. The highest female suicide rates were for those aged 45–64 (Garnett et al., 2022) (see Figures \(\PageIndex{8}\) and \(\PageIndex{9}\)).

    Graph showing suicide rates for males by age group in the U.S., 2000 to 2020.
    Figure \(\PageIndex{8}\). Male suicide rate by age group, U.S., 2000–2020. Image source.
    Graph showing suicide rates for females by age group in the U.S., 2000 to 2020.
    Figure \(\PageIndex{9}\). Female suicide rate by age group, U.S., 2000–2020. Image source.

    Deaths of Despair:

    Globally, suicide rates have fallen when the living conditions have improved (Weir, 2019). Not surprisingly, the opposite trend occurs under the opposite condition, and thus a decrease in economic and social well-being, referred to as deaths of despair, have been linked to suicides in America. The loss of farming and manufacturing jobs are believed to have contributed to deaths of despair, especially in rural communities where there is less access to mental health treatment. According to the CDC (2018), other factors that contributed to suicide among those with, and without, mental health conditions included relationship problems, substance use disorders, financial or legal problems, and health concerns (see Figure \(\PageIndex{10}\)).

    A graphic titled "Many factors contribute to suicide among those with and without known mental health conditions." Listed factors, determined from the CDC National Violent Death Reporting System from 2015, are given as 42% relationship problem, 29% crisis in the past or upcoming two weeks, 28% problematic substance use, 22% physical health problem, 16% job or financial problem, 9% criminal legal problem, and 4% loss of housing.
    Figure \(\PageIndex{10}\). Various reasons given for suicide. Image source.

    Prevention:

    Globally, limiting access to lethal means has contributed to a decrease in suicide rates (Weir, 2019). For example, switching from less-toxic gas for heating decreased carbon monoxide deaths, making it more difficult to access toxic pesticides decreased poisoning deaths, installing bridge barriers decreased jumping, and limiting access to firearms lowered deaths by guns. Equally important are prevention programs and improving access to mental health treatment, especially in the workplace. Many occupations have seen increases in suicide rates, and consequently specific programs are being designed to address the stressors associated with these jobs. Knowing the warning signs of suicide and encouraging someone to get treatment are things that everyone can do to address the increase in the suicide rate.

    CDC's 12 Warning Signs of Suicide
    • Feeling like a burden
    • Being isolated
    • Increased anxiety
    • Feeling trapped or in unbearable pain
    • Increased substance use
    • Looking for a way to access lethal means
    • Increased anger or rage
    • Extreme mood swings
    • Expressing hopelessness
    • Sleeping too little or too much
    • Talking or posting about wanting to die
    • Making plans for suicide

    Fatal Drug Overdoses

    Graph showing the age-adjusted drug overdose death rates in the U.S. between 1999 and 2020. Data is displayed for male, female, and total rates.
    Figure \(\PageIndex{11}\). Age-adjusted drug overdose death rates, U.S., 1999–2020. Image source.

    Another factor linked to the deaths of despair has been fatal drug overdoses. In 2020, 91,799 drug overdose deaths occurred in the United States for a rate of 28.3 people per 100,000 (Hedegaard et al., 2021). The rate in 2020 was 31% higher than the rate in 2019 (21.6 people per 100,000), and the rate of drug overdose deaths increased for all race and Hispanic-origin groups. Additionally, the rate for males increased from 29.6 to 39.5 and the rate for females increased from 13.7 to 17.1. For each year from 1999 through 2020, the rate for males was higher than for females (see Figure \(\PageIndex{11}\)). Unlike suicide rates, deaths from overdoses occur equally among those living in urban and rural areas.

    The rate of drug overdose deaths involving synthetic opioids other than methadone (drugs such as fentanyl, fentanyl analogs, and tramadol) increased 56%, from 11.4 in 2019 to 17.8 in 2020 (NIH, 2022). Fetanyl is an especially powerful opioid that can easily lead to a fatal overdose. Because it is synthetic, it is cheap to make and easier to conceal than heroin. As can be seen in Figure \(\PageIndex{12}\), deaths from opioids have increased significantly since 1999.

    More than 106,000 persons in the U.S. died from drug-involved overdose in 2021, including illicit drugs and prescription opioids. A bar and line graph shows the total number of U.S. drug overdose deaths involving select illicit or prescription drugs from 1999 to 2021. The bars are overlaid by lines showing the number of deaths by gender from 1999 to 2021.
    Figure \(\PageIndex{12}\). U.S. overdose deaths involving any opioid from 1999 to 2021. Image source.

    This page titled 10.2: Most Common Causes of Death is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by Martha Lally and Suzanne Valentine-French via source content that was edited to the style and standards of the LibreTexts platform.