The bulk of the analysis, as noted in the introduction, is for the year 2020, and this is related to the availability of statistical data.
3.1. COVID-19 Deaths in Cities
The COVID-19 pandemic reached Poland in March 2020, with the first fatal case reported on 12 March. A number of restrictions and a state of epidemic emergency were introduced in the country. Since the outbreak of the pandemic in Poland, 116,400 people have died from COVID-19 (as of 17 June 2021), resulting in nearly 307 deaths per 100,000 inhabitants. The level of mortality from COVID-19 among European countries clearly varies. Poland, along with other Central and Eastern European countries, is characterized by the highest values of COVID deaths per 100,000 inhabitants. It should be noted, however, that the value for Poland is significantly lower than those for Bulgaria (535), Hungary (477), or the Czech Republic (377). Western European countries have lower COVID-19 mortality rates (e.g., Netherlands—128; France—224), and Northern European countries have the lowest (Norway—61, Finland—86) [
28].
Between 2020 and 2021, 29,810 people (28.8% of the total COVID-19 deaths in the country) died as a result of the COVID-19 pandemic in major cities in Poland. In the first year of the pandemic (2020), less than 12,000 deaths from COVID-19 were reported in large cities in Poland; the following year, these deaths had increased by nearly 50% (the upward trend in urban mortality due to COVID-19 was similar to the national average).
The increase in these deaths can be seen in the significantly higher values of the rate of deaths from COVID-19 per 1000 inhabitants (
Figure 1). This situation applied to almost all large Polish cities, only in four of them (Bytom, Tarnów, Gliwice, and Wrocław) was the dynamic of deaths between 2020 and 2021 lower than 100% (
Figure 2). As a result of the pandemic in cities in 2020, nearly one in ten deaths was due to COVID-19, as in the country as a whole.
The proportion of these deaths varied across cities, from 6.3% in Sosnowiec to 12.6% in Tarnow (
Figure 3). The spatial distribution of the rate of deaths from COVID-19 was not correlated with the size of the population of cities in Poland, as high rates of deaths from COVID-19 were recorded both in the largest urban centers (e.g., Łódź) and in those with smaller populations (e.g., Włocławek).
It is also difficult to directly link high COVID-19 mortality to the availability of health care facilities and medical personnel. This is because the ratios of the number of beds and physicians per 10,000 inhabitants in cities with high COVID mortality rates varied widely. Generally, the highest rates of access to health care are observed in Poland’s largest cities functioning as academic centers, while in smaller towns with populations of 100,00–300,000, they are much lower. However, as noted above, high rates of death from COVID-19 were also recorded in cities with theoretically good (by national standards) access to health care. The SARS-CoV-2 pandemic has intensified and exposed the scale of problems with which Polish hospitals have been struggling for many years. These are primarily organizational chaos, staff shortages, and a generally difficult financial situation [
29].
According to Eurostat, Poland is the country with the lowest number of physicians in the European Union (2.4 physicians per 1000 inhabitants, with the EU average being 3.9) and nurses (5.2 per 1000 inhabitants, with the EU average being 8.4). In the first year of the COVID-19 pandemic, the Eurofund survey found that more than a quarter of Poles (28 percent) reported an unmet need for medical examination or treatment [
30].
3.2. Structure of Deaths by Sex and Age
The rate of mortality varies by gender and age. For a number of years, Poland has been witnessing the phenomenon of high male excess mortality, i.e., death rates for men are higher than for women, which is already evident among boys (0–14 years). In the total number of persons who died over the past years, men accounted for 52.8%. A gradual decrease in the proportion of men in the number of deceased can be observed. At the beginning of the 21st century, men accounted for more than 53% (53.6% in 2004, 2006–2007), while today, the proportion is 52.3% (2020).
Analysis of the statistical data clearly indicated a high male skew in COVID-19 deaths, both in Poland as a whole (137) and its cities (130). The prevalence of COVID-19 deaths in the male subpopulation occurred in 2020 in all cities in the country. In some of them, the skew in rates of deaths from COVID-19 towards males was very high, in 23 centers above the urban average value (SR = 139). The maximum value was recorded in Tarnów, where the number of deaths from COVID-19 among men was almost twice as high as among women (
Figure 4). The lowest males skew for COVID-19 deaths occurred in cities with a high level of female inhabitants, e.g., Łódź, Warsaw, Lublin.
An important element of the health situation is the aging of populations in developed countries, a positive effect of effective health care measures [
31]. Population aging is the process of increasing the proportion of older people (65+), i.e., the increase of
OAG, defined by Formula (5).
During the COVID-19 pandemic, the elderly were at increased risk of contracting coronavirus. This is because, according to the WHO, people over 61 years of age have weakened immune systems, making seniors more likely to struggle with chronic diseases. Diseases that can foster the multiplication of the virus include diabetes, ischemic heart disease, lung disease and asthma [
32].
The immune system of the elderly works less effectively, which is reflected in epidemiological data. In the age group of 85 and older, infections and cancers are the leading causes of death, while younger people over the age of 65 die mainly from cardiovascular diseases. Consequently, the elderly are characterized by greater susceptibility to viral and bacterial infections, weaker post-vaccination immunity, and less effective processes that oversee antigen-specific responses or limit damaged and abnormal cells [
33].
Among the people who died from COVID-19 in 2020, the population of ages 65+ is clearly dominant, accounting for 86% of all deaths, both nationally and in cities. Deaths from COVID-19 in the age group 15–64 accounted for less than 14% of all deaths, and less than 1% of deaths were among children and adolescents up to 14 years of age. Given the structure of deaths by age, the analysis of variation in deaths from COVID-19 was extended to include mortality among the elderly, i.e., people of 65 years and older. Simple measures like
DR65+ and
DRcov65+ (defined by Formulae (3) and (4), respectively) were used—cf.
Figure 5. In the case of
DR65+, the spatial distribution of the coefficient values is highly correlated with the percentage of old people living in these cities.
The urban centers with the highest mortality rates among seniors (e.g., Łódź and Wałbrzych with
DR65+ > 50) are at the same time the cities with the highest shares of elderly people in the total population—over 20% (cf.
Figure 5a and
Figure 6a). The coefficient of deaths from COVID-19 of people 65+ (
DRcov65+) does not show a simple dependence on the level of old age rate (
OAG) in cities. High values of
DRcov65+ were also noted in urban centers with lower old age (
OAG) and ageing (
OCR) indexes, e.g., Elbląg and Płock (cf.
Figure 5b and
Figure 6a,b).
An interesting aspect from a cognitive point of view is the age of the deceased—in this case, the median age was considered. In cities, the median age of the deceased in 2020 increased slightly compared to previous years (77.8 years—2019; 78.2 years—2020) and was one year higher than the median for the country, which was 77.1 years (
Figure 7). A comparison of the median age of all urban deaths (78.2 years) and COVID-19 deaths (78.6 years) indicates that slightly younger people had died from causes other than COVID-19. This may be a result of inadequate care and availability of health services during the pandemic period for other patients. The health situation of the population in Poland, including cities with more than 100,000 inhabitants, has worsened.
In the analysis of the age of the deceased in individual cities, it was observed that in most of them (26 urban centers), the median age of all deceased was higher than the median age of the deceased due to COVID-19 (
Figure 8). In the remaining cities, people who died from COVID-19 were slightly older relative to all deceased, but these age differences were not very large. Only in a few cities (like Szczecin and Zielona Góra) these differences exceeded three years.
3.3. Demographic Consequences of the COVID-19 Pandemic—Selected Aspects
In the search for mechanisms that describe mortality from infectious diseases, including COVID-19, one can turn to the concept of epidemiological transition. This theory is a concept that explains the underlying causes of mortality. The process described by the theory of epidemiological transition involves the replacement of mortality that results from infectious disease pandemics with mortality from degenerative and human-activity-induced diseases. This transition is parallel to the demographic transition and is also caused by the modernization of society. Just as the demographic transition theory explains population growth on the basis of changes in fertility and mortality, the epidemiological transition theory seeks to explain changes in mortality by referring to changes in health status and disease profile and their socioeconomic determinants. One of the bases of this theory was the assumption of the fundamental role of mortality for demographic transitions, as well as for socio-economic development in general.
The theory of epidemiological transition was formulated in 1971 by A. R. Omran based on an analysis of changes in mortality and disease profiles, as well as advances in health care and socioeconomic development in industrialized countries since the 18th century. According to this theory, populations experience three successive phases in the modernization process: epidemics and famines, when mortality remains very high, a reduction in infectious disease incidence, when life expectancy increases to nearly 50 years, and a phase of degenerative disease, during which the rate of decline in mortality wanes and the reduction in mortality due to infectious disease is accompanied by an increase in mortality due to chronic disease. In subsequent years, the theory of epidemiological transition was expanded and modified. In 1986, a fourth phase of the epidemiological transition was added—the phase of delayed degenerative diseases [
34]. A hybrid era was also distinguished [
35] (and, as another possible era, that of returning infectious diseases [
36]. Omran also modified his theory by adding phases four and five to the classical model [
37]. In recent years, a new concept of health transition has emerged [
38].
In 1998, almost 30 years after the first publication on epidemiological transition, Omran modified his theory, adding a fourth and a fifth phase to the classical model [
37]. The fourth phase according to Omran is characterized by:
a systematic increase in life expectancy values, reaching 80–85 years, and even higher for women;
a decline in mortality due to cardiovascular diseases, which is mainly associated with medical progress and changes in lifestyle, although cardiovascular diseases and cancer remain the main causes of death;
a large share of elderly people in the population structure;
the emergence of new diseases, including those caused by viruses, e.g., HIV/AIDS, hepatitis B and C, Ebola virus, various types of hemorrhagic fever, as well as new bacterial diseases or the re-emergence of already existing diseases, e.g., cholera, malaria, dengue fever, diphtheria, and tuberculosis.
According to Omran, not all countries that have entered phase three of the epidemiological transition have already moved into phase four. As an example, he cites Eastern European countries and Russia and the reported increase in mortality during the 1990s [
37]. The fifth phase of the epidemiological transition, occurring in the 21st century, will be a time of further increases in life expectancy and quality of life aspirations, with large social inequalities. Life expectancy in the fifth phase may increase to about 90 years as a result of increasing life expectancy of the elderly and decreasing mortality among at-risk and lower class individuals [
39].
In the same year as Omran’s article, there was an article written by Olshansky and co-authors that raised the dramatic question of whether the next phase of the epidemiological transition would prove to be a return to the first phase of the transition, that of infectious disease dominance [
36]. The paper refers to the observed prevalence of viral and bacterial infectious diseases worldwide, especially in developing countries. In addition, many of the diseases that are recorded today have been absent for several decades, or if they did occur, they were endemic, that is, in specific areas and affecting only local populations [
34,
35,
36,
37,
38,
39].
Since the 1990s, Poland’s largest cities have undergone intensive demographic transformations, the most important of which are depopulation and population ageing. According to the demographic forecast of the GUS prepared in 2014, only two cities –Warsaw and Rzeszów—will slightly increase their population potential by 2050 [
40]. In the case of Poland’s capital city, the expected population growth results from the preponderance of a positive migration balance over natural losses. The forecasts look slightly different for Rzeszów, for which a natural increase is expected until the beginning of the 2030s and then a decrease compensated by positive migration growth. However, in the vast majority of cities in the country, the depopulation processes will result from the excess of deaths over births, which will be strengthened by the negative migration balance.
The pandemic has strongly affected the course of demographic phenomena in 2020, exacerbating the adverse trends observed in cities over the last decade. Population changes in recent years are mainly influenced by the natural increase, which has remained negative since 2010 (
Figure 9). The bad mortality situation together with a very low birth rate in 2020 contributed to the record low in natural increase in cities. Its negative value was more than three times higher than in 2019.
One consequence of the increased number of deaths during the pandemic was an increasing rate of natural loss in cities (
Figure 10). Even before the pandemic, eight cities had a surplus of births over deaths, and after the first year of the pandemic, only two cities recorded positive values of natural population growth, Rzeszów and Białystok.
The demographic situation was particularly difficult in this respect in: Wałbrzych (−9.9‰), Bytom (−8.2‰), Częstochowa (−8.0‰), Łódź (−7.7‰), Sosnowiec (−7.7‰) and Chorzów (−7.3‰). These cities are dominated by centers where industry is, or was, the basis of economic development. In addition, it should be noted that a high population concentration favored the development of SARS-CoV-2 infections, which occurred, for example, in the Upper Silesian Conurbation.
The intensity of deaths in cities did not change significantly until 2019—it was increasing, but the rate of increase was small and fairly uniform. In 2020, there was a sharp increase in the number of deaths—more than 138,000 people died (the average number of deaths in 2015–2019 was 118,500). The pandemic caused by the SARS-CoV-2 virus is most responsible for the higher mortality rate. Direct victims of COVID-19 account for about 60% of the recorded increase in mortality. The death rate in 2020 was 12.9, 1.7 p.p. higher than in 2019.
In the analyzed group of cities, the mortality rate just before the onset of the pandemic varied from 8.2‰ in Rzeszów to 15.1‰ in Wałbrzych (
Figure 11). The group of cities with the highest mortality rates included, apart from the already mentioned Walbrzych, such cities as Lodz (14.2‰) and Chorzow (14‰). An attempt to identify common factors which determined similar crude mortality rates in the above-mentioned cities points to the influence of the level of population ageing in those centers. Moreover, the highest total mortality rates (both crude and age-standardized) were observed in the cities which were centers of old industrial districts (Łódź, Katowice). Changes in the intensity and structure of mortality in the population of cities, as in Poland as a whole, will continue, which is a consequence of the expected further ageing of the population of cities, including voivodeships [
41,
42,
43].
The first year of the pandemic saw a significant increase of 15% in deaths in cities compared to 2019 (from 120,088 to 138,362). High mortality values, which were recorded in Walbrzych and Lodz before the pandemic, were magnified in the first year of the pandemic—the death rate reached values of 17‰ (Walbrzych) and 16.2‰ (Łódź), respectively. It should be noted that all analyzed cities recorded increases in mortality from 1 to 3 p.p. (
Figure 10).
The increased number of urban deaths in 2020 compared to the previous year was due to the COVID-19 pandemic, but also to excess mortality, which involved “non-COVID” patients with chronic diseases or sudden health incidents who were not diagnosed and did not start treatment on time or whose treatment was stopped. Excess deaths represent the difference between the number of deaths in a given period and the average number of deaths for similar periods in the last few years. According to the President of the Polish Society of Civilization Diseases, Professor Filip Szymański, the excess of deaths in relation to previous years, referred to as health debt, represents not only the effect of a pandemic but also the suboptimal treatment of civilization diseases [
44].
The pandemic has presented the health care system with a new challenge—to recognize the areas of greatest health debt that have been created by focusing attention on fighting the coronavirus at the expense of other health problems. Health debt is the neglect of health, postponing or even failing to initiate disease diagnosis, follow-up appointments, scheduled treatments, or other important medical procedures. Many people have avoided health services not only for fear of the COVID-19 infection, but also because it was difficult to access outpatient facilities and hospitals [
45].
Factors that have further led to an increase in excess deaths include staff shortages (one of the lowest rates in Europe per 1000 inhabitants), low health care financing in Poland, low quality of care as perceived by patients, and a paternalistic approach to the patient. Other reasons include: redundant and inadequate isolation procedures implemented to eliminate the risk of SARS-CoV-2 transmission; visitation bans and the hermetic isolation of patients (not only COVID-19 but also non-COVID-19); the closure of wards; a division of the health care system, including transport, into two independent circuits, for COVID-19 patients and for non-COVID-19 patients; mass quarantine and isolation of staff, often without symptoms or with light symptoms; recommendations by scientific societies to maximize patient time; extreme restraint in planning and performing diagnostic and therapeutic procedures; mass PCR testing that did not accurately identify the sick and infecting person; and mass quarantining of families, making it impossible for them to function normally or get help. Surplus deaths should be viewed as a very high interest rate on health debt [
46].
According to the methodology used by the Ministry of Health, excess deaths in the year 2020 represent the difference between the number of deaths for that year and the average number of deaths for similar periods in the last few years (2015–2020) [
47].
Compared to the 2015–2019 average, Poland recorded over 79,000 additional deaths. In this grim ranking of excess deaths, it is second in Europe (first place goes to Bulgaria). Poland experienced more than 2000 additional deaths per one million inhabitants compared to the 2015–2019 average; Sweden recorded just over 500 additional deaths per one million inhabitants and Germany about 400 additional deaths per one million inhabitatns [
46].
In Polish cities, almost 20,000 excess deaths were recorded, that is, 188 excess deaths per 100,000 inhabitants (
Table 1). Among the cities, the highest rates of excess deaths per 100,000 inhabitants were observed in Kielce (300), Bytom (298), and Tarnów (290). The lowest excess mortality was recorded in Gdynia and Olsztyn—113 and 114 deaths per 100,000 inhabitants, respectively. The excess deaths were not only deaths from COVID-19 but also deaths of non-COVID-19 patients. COVID-19 deaths accounted for over 60% of excess deaths in the cities. This phenomenon varied widely among cities, from 97% in Łódź to 40% in Dąbrowa Górnicza (
Table 1).
Such a large disparity between Covid-related and non-Covid-related mortality in additional deaths obliges us to once again question the reliability of the available data. In many discussions around the pandemic, it was emphasized that data on deaths due to COVID-19 were overestimated in official statistics in many countries.
Undoubtedly, this was the result of additional funding for health care facilities and medical staff serving patients with COVID-19. In addition, during the pandemic, the organizational system of hospital services in Poland changed; some specialized facilities were converted into COVID hospitals that treated only patients infected with SARS-CoV-2. These reasons may explain the very large discrepancies in the structure of excess deaths. As previously reported, in Łódź and Olsztyn, more than 90% of all excess deaths were COVID deaths. This would indicate that in these cities, practically all the additional deaths during the pandemic were due to COVID-19 alone, which seems unlikely.