[Infection fatality rate (IFR) during the course of COVID-19 pandemic in Upper Silesia Metropolitan Area (Poland) in 2020]. / Wskaznik smiertelnosci infekcji (IFR) w przebiegu pandemii COVID-19 w Aglomeracji Górnoslaskiej w 2020 r.

BACKGROUND: During the course of COVID-19 pandemic, a wide range of scientific projects was implemented worldwide, including studies focusing on infection fatality rate (IFR). The value of IFR depends on the number of COVID-19 deaths in a population in a given period and the number of infected people in this population, usually provided by seropepidemiological studies (anti-SARS-CoV-2 IgG in the case of COVID-19). The objective of our study was to estimate IFR in the course of COVID-19 pandemic in 2020, in the general population of Upper Silesia Metropolitan Area (USMA). MATERIAL AND METHODS: The seroepidemiological study was conducted in October-November 2020. Among randomly selected inhabitants of Katowice, Gliwice, and Sosnowiec (N = 1167), the presence of SARS-CoV-2 virus infection was assessed based on a positive IgG test result performed with the ELISA method. Data on deaths due to COVID-19 were obtained from the Registry Offices of each city. The infection fatality rate was calculated using the formula IFR (%) = [number of deaths/number of infected] × 100. RESULTS: Results of our study showed the prevalence of infection at 11.4% (95% CI: 9.5-13.2). In three examined towns, in the period January-November 2020, there was a total of 516 COVID-19 deaths. The resulting crude IFR was 0.65% (95% CI: 0.56-0.78). The IgG test had 88% sensitivity and 99% specificity and these figures were used to adjust IFR. The adjusted IFR value was similar to the crude value: IFR = 0.62% (95% CI: 0.53-0.74). CONCLUSIONS: The value of IFR estimated for the USMA population was similar to average values obtained in other countries and can be used as the background for monitoring the course and impact of COVID-19 pandemic in the Upper Silesian Industrial Area. Med Pr. 2021;72(6):671-6.

SARS-CoV-2 Antibody Seroprevalence in Wuhan, China, from 23 April to 24 May 2020.

The outbreak of coronavirus disease 2019 (COVID-19) was first reported in Wuhan, China, in December 2019. To investigate the prevalence of COVID-19 in Wuhan, we conducted serologic tests on 35,326 individuals from four different communities to estimate cumulative incidence of infection. Our results showed that 1,332 individuals (3.77%) showed positive COVID-19 antibody (either IgM or IgG). Males had a lower positivity rate than females (3.02% versus 4.52%). The antibody positivity rates showed a clear trend of increase according to patients' ages and varied among different communities. The results indicate that public health interventions may play important roles in the control of COVID-19.IMPORTANCE Coronavirus disease 2019 (COVID-19) was first detected in December 2019 in Wuhan, China. Afterwards, a number of public health interventions were implemented, including lock-down, face mask ordinances, and social distancing. Studies that rely on viral RNA testing of symptomatic patients have shown that these multifaceted interventions contributed to the control of the COVID-19 outbreak in Wuhan and delayed the epidemic's progression. However, these estimates of confirmed cases may miss large numbers of asymptomatic patients and recovered symptomatic patients who were not tested. To investigate the prevalence of COVID-19 in Wuhan, we conducted serologic tests on 35,326 individuals to estimate the cumulative incidence of infection. The results suggest that public health interventions may play important roles in the control of COVID-19.

Seroprevalence of Anti-SARS-CoV-2 Antibodies in a Random Sample of Inhabitants of the Katowice Region, Poland.

Lack of knowledge around seroprevalence levels of COVID-19 in Poland was the reason for the implementation of a seroepidemiological study in the Katowice Region (2,100,000 inhabitants). In October-November 2020, a questionnaire examination and measurement of anti-SARS-CoV-2 IgG and IgM antibodies were performed in a random sample of the general population (n = 1167). The objectives of the study were to estimate the prevalence of IgG and IgM antibodies and to assess their host-related correlates. The prevalence of IgG seropositivity was 11.4% (95% CI: 9.5-13.2%) and IgM seropositivity was 4.6% (95% CI: 3.5-5.8%). Diagnosis of COVID-19 was found in 4.8% of subjects. A positive IgG test was statistically significantly associated with age (inverse relationship), a person's contact with a COVID-19 patient, quarantine, and two symptoms in the past: fever and loss of smell/taste. Positive IgG tests were less prevalent in subjects who had diagnoses of arterial hypertension, diabetes, or rheumatologic disorders. IgM test positivity was associated with quarantine and loss of smell/taste only with no effect of chronic diseases found. In Poland, in the period October-November 2020, the prevalence of SARS-CoV-2 infection was larger than earlier estimates obtained in other European countries, probably reflecting the measurements obtained during the "second wave" of the epidemic.

Impact of changing GOLD guidelines (2007-2011-2017) on assignment of a COPD patient to disease severity category.

INTRODUCTION: The international standard for the recognition and treatment of chronic obstructive pulmonary disease (COPD) is guided by a regularly updated set of criteria developed by the Global Initiative for Chronic Obstructive Lung Disease (GOLD). AIM: To investigate the impact of updated COPD management guidelines from 2007 to 2017 (GOLD 2007, GOLD 2011 and GOLD 2017) on the assignment of patients into individual therapeutic groups, examining both individual and population dimensions. MATERIAL AND METHODS: Each of 500 randomly chosen primary care physicians in Poland provided information on 10 individual COPD patients (disease history, clinical status, treatment and pharmacotherapy). This data was used to simulate the consequences of the implementation of the GOLD 2007, 2011 and 2017 guidelines. RESULTS: A group of 298 physicians of 500 approached provided information on 2597 patients (64.2% males) aged 29-96 (61.6 ±11.1 years). Based on GOLD 2007 guidelines, most patients (56.7%) presented a severe stage of COPD. GOLD 2011 updates would significantly increase the proportion of patients with the most severe stage of disease, and this group would be predominantly classified as moderate or severe in GOLD 2007. The implementation of GOLD 2017 guidelines would result in a significant migration of patients towards the lightest (category A) form of the disease. CONCLUSIONS: Updates to the GOLD 2007 COPD guidelines for GOLD 2011 and 2017 would have a significant impact on the classification of patients for particular therapeutic groups. As a result of the migration of patients to particular therapeutic groups, the pharmacological treatment would also change.

New ideas, old problems? Heated tobacco products - a systematic review.

Heated tobacco products (HTPs) are a form of nicotine delivery intended to provide an alternative to traditional cigarettes. The aim of this systematic review was to present the current state of knowledge on HTPs with an emphasis on the potential impact of HTP use on human health. During the preparation of this systematic review, the literature on HTPs available within Medline/PubMed, EMBASE, CINAHL, ScienceDirect, and Google Scholar was retrieved and examined. In the final review, 97 research papers were included. The authors specifically assessed the construction and operation of HTPs, as well as the chemical composition of HTP tobacco sticks and the generated aerosol, based on evidence from experimental animal and cellular studies, and human-based studies.Heated tobacco products were found to generate lower concentrations of chemical compounds compared to traditional cigarettes, except for water, propylene glycol, glycerol, and acetol. The nicotine levels delivered to the aerosol by HTPs were 70-80% as those of conventional combustion. The results of in vitro and in vivo assessments of HTP aerosols revealed reduced toxicity, but these were mainly based on studies sponsored by the tobacco industry. Independent human-based studies indicated that there was a potentially harmful impact of the active and passive HTP smoking on human health. Currently, a large body of knowledge on HTP exposures and health effects is provided by the tobacco industry (52% of identified studies). Based on the available evidence, HTPs produce lower levels of toxic chemicals, compared to conventional cigarettes, but they are still not risk-free. Int J Occup Med Environ Health. 2019;32(5):595-634.

Acute respiratory responses to the use of e-cigarette: an intervention study.

The goal of our study was to assess acute respiratory responses to using e-cigarettes in exclusive e-cigarette users (E-Group) and dual users (T/E-Group) and to compare these effects with responses to smoking tobacco-cigarettes in tobacco smokers (T-Group). The study included 120 adults (age: 21.7 ± 2.1 years) divided into 4 groups (n = 30 each): Controls, T-, E-, T/E-Group. Spirometric status, O2 saturation, exhaled FeNO levels, exhaled CO levels, and airway temperature were assessed before the use of an e-cigarette (E-, T/E-Group) or tobacco cigarette as well as 'minute 1' and 'minute 30' after smoking. Controls used an e-cigarette without e-liquid. Lower (p < 0.05) baseline values of FeNO were found in T-Group (15.4 ppb) and in T/E-Group (15.0 ppb) than in Controls (19.6 ppb). Following exposure, and compared with Controls, T-, and T/E-Group had a significant decrease (p < 0.05) in PEF and MEF75. Mean FeNO values decreased on 'minute 1' in T-Group (by 2.1 ppb), E-Group (by 1.5 ppb) and in T/E-Group (by 2.2 ppb). Other effects included increase in temperature of exhaled air (p < 0.05). The use of e-cigarettes is associated with decreased FeNO and airflow indices (PEF, MEF75), but an increase in airway temperature. These changes are similar to those after exposure to tobacco cigarette smoke.

Costs of pharmacotherapy of chronic obstructive pulmonary disease in relation to changing Global Initiative for Chronic Obstructive Lung Disease guidelines (2007, 2011, and 2017 updates).

INTRODUCTION Chronic obstructive pulmonary disease (COPD) is one of the most common chronic noninfectious diseases. The clinical management is determined by patient assignment to the severity stage of the disease in accordance with the Global Initiative for Chronic Obstructive Lung Disease (GOLD) guidelines. OBJECTIVES Our aim was to determine the economic implications of changing GOLD guidelines (2007, 2011, and 2017 updates) and their impact on the direct costs of pharmacological treatment of patients diagnosed with COPD. PATIENTS AND METHODS This analysis was based on data provided by a group of 298 out of 500 randomly selected primary care physicians in Poland (response rate, 59.6%). Each primary care physician provided information on 10 consecutive patients with COPD. These data were used to simulate the economic consequences of the 2007, 2011, and 2017 GOLD guideline updates. RESULTS Regardless of the GOLD guidelines used, pharmacotherapy of patients with a very severe form of COPD was most expensive. Pharmacotherapy costs would be reduced with each subsequent guideline. In the same group of 2597 COPD patients, the average monthly cost of the first­line pharmacotherapy as well as the overall costs of pharmacotherapy (first- and second­line) per patient would be the lowest when applying the therapeutic regimen in accordance with the 2017 GOLD guidelines. CONCLUSIONS Implementation of 2011 and 2017 GOLD guidelines, as compared with the 2007 update, would result in a reduction of direct costs of COPD treatment.

Comparison of spirometric results obtained from the sitting and standing position in children participating in an epidemiological study.

INTRODUCTION: It is recommended that spirometric testing in children be completed while sitting. Our experience indicates that children prefer standing during spirometry. AIM: We sought to compare spirometric results obtained from the sitting (SIP) and standing (STP) positions. MATERIAL AND METHODS: Two testing sessions were performed in random order (SIP vs. STP: 30-45 min apart) in 118 children (7-13 years), attending one, randomly selected, primary school (response rate: 92%). RESULTS: Acceptable quality was found in 77.9% of STP and 77.1% of SIP maneuvers. Higher values of spirometric variables on STP, compared to SIP, were obtained for forced vital capacity (FVC) (2.12 ±0.41 l vs. 2.11 ±0.39 l) and forced expiratory volume in 1 s (FEV1) (1.78 ±0.36 l vs. 1.77 ±0.35 l) but the differences were not statistically significant. Relative between-position differences (RBPD) ≤ 5% were found with the following frequencies: FVC: 56.4%, FEV1: 69.2%, PEF: 21.7%, and FEF25-75: 24.3%. Similar patterns were found for FEF25, FEF50, and FEF75. Relative between-position differences were related to age in the case of FEV1 (p = 0.005), FEF25 (p = 0.02), and FEF25-75 (p = 0.01) where older children had smaller RBPD. Forced vital capacity RBPD was lower (p = 0.01) in subjects with current wheeze; PEF RBPD were lower (p = 0.02) in children with asthma. CONCLUSIONS: In epidemiological studies, the position of spirometric testing does not affect the results of lung function assessment.

Socio-demographic factors related to under-diagnosis of childhood asthma in Upper Silesia, Poland.

Introduction. The presented study of 4,535 children aged 7-17 years in the Upper Silesian region of Poland yielded 186 cases of previously known asthma, and 44 children with newly diagnosed asthma. The aim of the presented study was to identify non-medical factors that could explain why children with a newly established diagnosis ('undiagnosed asthma') had not been diagnosed in the past. Materials and method. The study was performed according to a case-control design. Parents of the children answered questionnaires on socio-economic status and family-related factors. Statistical determinants of undiagnosed asthma were explored using raw (OR) and logistic odds ratios with their 95% confidence intervals (logOR, 95%CI). Results. Children with undiagnosed asthma were younger compared to the group with previously known asthma (11.3±2.1 vs. 12.6±2.5 years; p=0.0008). Newly diagnosed cases were more frequent in children who had less parental attention (less than 1 hour/day spent by parent with child - OR=4.36; 95%CI: 1.76-10.81) and who were not registered with specialized health care (OR=2.20; 95%CI: 0.95-5.06). Results of logistic regression analysis suggest that under-diagnosis of asthma is related to age below 12 years - logOR = 3.59 (95%CI: 1.28-10.36), distance to a health centre > 5 km - logOR = 3.45 (95%CI: 1.05-11.36), time spent with child < 1 hour/day - logOR = 6.28 (95%CI: 1.98-19.91). Conclusion. Among non-medical determinants of undiagnosed asthma the age of a child plays a major role. Another factors of importance is the large distance between residence and health centre, and low parental attention at home.

[Profile of adults suffering from COPD in Poland].

INTRODUCTION: Chronic obstructive pulmonary disease (COPD) is one of the most common chronic diseases in adults. It is estimated, that in Poland around two million people suffer from COPD. THE AIM: The aim of this study, was to characterize population of patients with COPD in Poland. MATERIAL AND METHODS: The study, established and coordinated by the Polish Respiratory Society, included a representative sample of 500 GPs where were asked to fill questionnaires on diagnosis and treatment of their COPD patients. The questions dealt with disease history and clinical presentation, COPD severity stage, diagnostic and therapeutic procedures. RESULTS: Altogether 298 physicians (59.6% of invited) provided information about 2756 COPD patients aged 61.6 ± 11.1 years (36.3% were women). According to GOLD recommendations 16.6% of patients had mild, 57.0% moderate, 18.6% severe and 2.1% very severe COPD. Smoking history was declared by 97.8% of respondents. 51.4% of COPD patients had continued smoking. Over the last year Ambulance Service intervened in 19.7% of patients and 29.1% of respondents required hospital treatment of COPD. Among more than 80% of patients, doctor diagnosed limitation in exercise tolerance, and shortness of breath at rest, and in approximately 60% of the respondents were presented productive cough, weakened vesicular murmur and prolonged phase of exhalation. CONCLUSIONS: Despite the diagnosis, more than half of men and women had continued smoking. The number of hospitalizations and emergency intervention positively correlated with the severity of the disease. The survey results emphasize the urgent need for health education in patients with COPD.

[Treatment of asthma in Poland by primary care physicians--results of PulmoScreen study]. / Leczenie chorych na astme bedacych pod opieka lekarzy POZ--wyniki ogólnopolskiego badania PulmoScreen.

INTRODUCTION: Proper treatment of asthma patients is crucial for long-term control of the disease. OBJECTIVE: The aim of the study was to evaluate the treatment of adult asthma patients by primary care physicians in the light of international GINA guidelines. MATERIAL AND METHOD: The cross-sectional study included a representative sample of 1852 general practitioners (GPs) who were asked to complete questionnaires on the diagnosis and treatment often consecutive patients with asthma who are under their care. RESULTS: Altogether 1250 GPs provided information about 10,981patients. During the entire duration of the disease 50.9% were ever treated by systemic corticosteroids. In the current treatment of asthma inhaled steroids were used in 78.8% of cases, oral steroids in 5.8%, intravenous steroids in 1.3% and intramuscular steroids in 0.7% of patients. SABA were used in 63.1% of patients, LABA in 57.1%, methylxanthine in 25.1%, leukotriene modifiers in 21.1%, anticholinergics drugs in 15.5%, cromones in 1,9%, and antihistamines in 23.1% of adult patients with asthma. In 88.8% cases LABA treatment was combined with inhaled corticosteroids. In 83.8% of cases therapeutic regimens were in line with the GINA guidelines. CONCLUSIONS: There is a need for systematic educational activities addressed to primary care physicians.

[Profile of adults suffering from asthma in Poland--results of PulmoScreen study]. / Profil doroslych chorujacych na astme w Polsce--wyniki badania PulmoScreen.

INTRODUCTION: Adult patients with diagnosis of asthma remain largely under the care of primary care physicians (general practitioners). Thus, they play an important role in diagnosing and treating this population. The aim of the study was to characterize of adults with asthma remaining under the care of Polish general practitioners (GP) as well as to evaluate the use of diagnostic tools and treatment in light of GINA recommendations. MATERIAL AND METHODS: This questionnaire study included a representative sample of 1852 general practitioners (GPs) who were asked to complete questionnaires on the diagnosis and treatment of their patients with asthma. RESULTS: Altogether 1250 GPs provided information about 10 981patients. Controlled asthma had 21.2% patients, 46.9% partly controlled, and 31.9% uncontrolled asthma. Allergy skin prick tests were performed in 64.8%, bronchial reversibility tests in 58.1% and bronchial provocation tests in 9.8% of patients. Spirometry results were obtained for 41.9% of patients. In the last year 16.6% of patients underwent emergency intervention due to asthma exacerbation and 18.1% required hospitalization. CONCLUSIONS: In Polish asthma patients the frequency of allergological and pulmonological visits as well as the frequency of spirometric assessment are poorly associated with asthma control level. The diagnostic tests recommended by international and national guidelines for the management of asthma are performed too seldom. Hospitalizations and emergency interventions related to asthma exacerbations are found in a large portion of patients and depend on their gender and asthma control level. Asthma has a negative impact on everyday activity in more than half of patients. Proper assessment of the level of causes asthma control according to GINA guidelines poses problems to Polish general practitioners.

Social and family-related correlates of medical care utilization by asthmatic children in Upper Silesia, Poland.

BACKGROUND: Studies on childhood asthma demonstrate socioeconomic disparities in medical care utilization. A lack of information for Poland prompted our investigation into this question. Its goal was to discover if the utilization of medical services by asthmatic children depends on social and family factors. METHODS: Subjects were 186 children with physician-diagnosed asthma, identified through a questionnaire survey of 4,535 school children in Katowice District, Poland. Utilization of medical care was assessed by such past year events as medical visits (44.0%), any diagnostic test (35.4%) and spirometry (30.6%). Association of those events with socioeconomic variables was explored by means of logistic regression, according to the criterion p< 0.1. RESULTS: After adjustment for disease severity and gender medical visits were related to younger age (p=0.009), family history of respiratory diseases (p=0.08) and rural residence (p=0.09), any diagnostic tests to younger age (p=0.08), smaller number of siblings (p=0.01) and rural residence (p=0.004); spirometry to smaller number of siblings (p=0.09) and rural residence (p=0.006). CONCLUSION: Clinical status and age are important determinants of utilization of medical services by asthmatic children. The effects of rural residence and family size may reflect a more attentive response to the needs of a sick child.

[Tuberculosis epidemiology in Silesia Voivodship (Poland) between 1994-2004]. / Epidemiologia gruzlicy w województwie slaskim w latach 1994-2004.

The incidence of tuberculosis in Poland is about 2-3 times higher than average for E.U. countries. The aim of this study was to evaluate tuberculosis epidemiology in Silesia Voivodship (region where 12% of Polish citizens live) against the background of the country (Poland). The paper presents actual TB epidemiology situation (incidence, prevalence, morbidity and mortality from TB in Silesia and in Poland) as well as its trends observed between 1994-2004. The regional incidence in 2004 was 36% lower than in 1994, but 28 per 100,000 population is still higher than 24.9 per 100,000 observed in Poland. The incidence of tuberculosis increases with age, 0.8 in children aged 0-14 years, up to 48.0 among 65 and older. In 2004 incidence in the age groups 20-44 and 45-64 years (23.7 and 46.9 respectively) was much higher than average observed in Poland (20.3 and 39.5 respectively), as well the proportion of new cases in this age groups. The TB incidence in men (41.7) is 2.6 times higher than in women (15.2). Between 1998-2004 in Silesia Voivodship morbidity was growing and in 2004 was 60.6 per 100,000. In the year 2000 TB mortality was almost two times higher in Silesia (4.4) than the average in Poland (2.4). Epidemiological situation of tuberculosis in Silesia Voivodship between 1994-2004 improved but is still bad. To correct this situation it is necessary to improve the process of fast diagnosis and effective therapy.

[Epidemiology of tuberculosis in Silesia Voivodship (Poland) between 1990-2000]. / Epidemiologia gruzlicy w województwie slaskim w latach 1990-2000.

The incidence of tuberculosis in Poland is about 2-3 times higher than average for EU countries. The aim of this study was to evaluate epidemiology of tuberculosis in Silesia Voivodship against the background of the country of Poland. The paper presents actual TB epidemiology situation (incidence, prevalence, morbidity and mortality from TB in Silesia and in Poland) as well as its trends observed between 1990-2000. The regional incidence in 2000 was 15% lower than in 1990, but 35.4 per 100,000 population is still higher than 29.7 per 100,000 observed in Poland. The incidence of tuberculosis increases with age, 1.2 in children aged 0-14 years up to 58.1 among 65 and older. In 2000 incidence in the age groups 20-44 and 45-64 years (36.7 and 57.4, respectively) was much higher than average observed in Poland (28.0 and 47.2, respectively), as well the proportion of new cases in this age groups (38.8 and 40.2%, respectively). The TB incidence in men (51.8) is 2.6 times higher than in women (20.0). Between 1998-2000 in Silesia Voivodship prevalence was growing and in 2000 it was 56.9 per 100,000. In 2000 TB mortality was almost two times higher in Silesia (5.1) than average in Poland (2.7) and opposite to trends observed in the country, it was 11% higher than in 1990. Epidemiological situation of tuberculosis in Silesia Voivodsip is bad. To correct this situation it is necessary to improve the process of fast diagnosis and effective therapy.

[Prevention of childhood bronchial asthma--needs, abilities, limitations]. / Profilaktyka astmy oskrzelowej wieku dzieciecego--potrzeby, mozliwosci, ograniczenia.

Through lack of effective primary prevention of childhood asthma, good secondary prevention program by early detection of the disease, is needed. Therefore we sought to estimate sensitivity, specificity and predictive values of asthma symptoms questionnaire. In Mikolów District 899 school children, aged 8-9 years were screened using respiratory symptoms questionnaire (80% of all in that age group). Question on "attacks of dyspnea" had the best positive predictive value (28%), high specificity (61%) and sensitivity (92%). Positive predictive values for other single symptoms were lower, but comparable values had "attacks of dyspnea with wheezing" (25%), with lower specificity (35%) and high sensitivity (95%). These findings confirm that standard questionnaire is a useful instrument for the childhood asthma screening. Until design and validation of more advanced screening tools, early identification children with asthma by questionnaire should be basic in prevention programs of the disease.