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BACKGROUND: We aimed to determine the influence of coronavirus disease 2019 (COVID-19) pandemic on blood pressure (BP) control assessed by ambulatory blood pressure monitoring (ABPM). METHODS: Office BP and ABPM data from two visits conducted within a 9-15 months interval were collected from patients treated for hypertension. In the prepandemic group, both visits took place before, while in the pandemic group, Visit-1 was done before and Visit-2 during the pandemic period. RESULTS: Of 1811 collected patients 191 were excluded because they did not meet the required ABPM time frames. Thus, the study comprised 704 patients from the pandemic and 916 from the prepandemic group. Groups did not differ in sex, age, duration of hypertension, frequency of first line antihypertensive drug use and mean 24 h BP on Visit-1. The prevalence of sustained uncontrolled hypertension was similar in both groups. On Visit-2 mean 24 h BP, daytime and nighttime systolic BP and diastolic BP were higher in the pandemic compared to the prepandemic group (P < 0.034). The prevalence of sustained uncontrolled hypertension on Visit-2 was higher in the pandemic than in the prepandemic group [0.29 (95% confidence interval (95% CI): 0.26-0.33) vs. 0.25 (95% CI: 0.22-0.28), P < 0.037]. In multivariable adjusted analyses a significant difference in BP visit-to-visit change was observed, with a more profound decline in BP between visits in the prepandemic group. CONCLUSIONS: This study using ABPM indicates a negative impact of the COVID-19 pandemic on BP control. It emphasizes the need of developing strategies to maintain BP control during a pandemic such as the one induced by COVID-19.

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This population-based study aimed to evaluate the incidence of urinary tract infections following hip and knee arthroplasty (HPRO and KPRO) and identify urinary tract infection risk factors among Polish patients. The analysis included data from 83,525 patients, with incidence rates of 0.7% and 0.49% after HPRO and KPRO, respectively. We identified women, individuals over 65 years old, residents of long-term care facilities, patients with chronic circulatory, endocrine, or digestive diseases, and those operated on due to trauma as targets for infection prevention and control.

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BACKGROUND: The reports of studies that compare the survival of adolescents and young adults with younger children with acute myeloid leukemia (AML) are contradictory. PATIENTS AND METHODS: We retrospectively analyzed 220 AML patients aged 0-18 years treated in pediatric oncologic centers in Poland from 2015 to 2022. The evaluated group included 31 infants (below 1 year), 91 younger children (1-9.9 years), 59 older children (10-14.9 years), and 39 adolescents (15-18 years). RESULTS: A 5-year overall survival for adolescents was not significantly inferior compared to younger and older children (74.3 ± 7.6% vs. 80.5 ± 4.4% vs. 77.9 ± 5.1, p = 0.243). However, relapse-free survival was lower in adolescents compared to younger children (76.5 ± 7.8% vs. 65.7 ± 9.0%, p = 0.049), and treatment-related mortality tended to be higher (10.3% vs. 4.4%, p = 0.569). In the univariate analysis, high-risk genetics [HR, 2.0 (95% CI 1.1-3.6; p = 0.014)] and a leukocyte count at diagnosis above 100,000/µL [HR, 2.4 (95% CI 1.3-4.6; p = 0.004)] were found to be unfavorable prognostic factors for survival. CONCLUSIONS: Although we have not found that age over 15 years is an unfavorable factor for overall survival, the optimal approach to therapy in adolescents, as in other age groups, is to adjust the intensity of therapy to individual genetic risk and introduce targeted therapies when indicated.

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Prevalence of metabolic syndrome (MetS) and its components is a growing issue, including pediatric populations. However, because of many definitions used, it is difficult to assess the true frequency of these problems. The aim of this study was to assess the prevalence of MetS and its components as well as the frequency of problems with inadequate nutritional status among adolescents. One hundred ninety-six teenagers aged 15-18 years, living in Krakow and its vicinity were examined including measurement of blood pressure, anthropometric parameters and blood levels of cholesterol and glucose. The prevalence of MetS was low and varied from 0.5% to 2.0% depending on the definition. Based on Cook's definition of MetS, the most common components were hypertension (12.8%) and hypertriglyceridemia (12.8%). Improper body weight (based on BMI) was found in 23.5% of adolescents, including 5.1% underweight, and 18.4% overweight or obese. According to the body fat percentage (BF%), 45.8% of the boys were underfat and 6.3% had too much body fat, while only 4% of the girls were below the BF% reference values and 15% above. All girls and 86.5% of boys had too low total body water. In conclusion, the prevalence of metabolic syndrome in population of Krakow adolescents was relatively low, but more than 12% of the adolescents had a hypertension or hypertriglyceridemia. Based on BMI most of adolescents were found to have adequate body weight, but examination of fat content in the body high prevalence of underfat was observed, especially among boys.

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Arthroplasty is a common procedure improving functioning of patients and their quality of life. Infection is a serious complication that determines subsequent management of the prosthesis and the patient. The aim of the study was to investigate the incidence of post-discharge surgical site infections (SSI) and their risk factors. A retrospective analysis of an anonymized database from the National Health Found for 2017 of 56,068 adult patients undergoing hip replacement surgery (HPRO) and 27,457 patients undergoing knee replacement surgery (KPRO). The cumulative incidence of post-discharge SSI was 0.92% for HPRO and 0.95% for KPRO. The main risk factors for hip SSI were male gender, diseases of hematopoietic, musculoskeletal and nervous system. The risk factor for knee SSI was male gender. All comorbidities significantly increased the risk of SSI. The ICU stay and antibiotics administered at discharge in studied population increased the risk of detection of SSI after HPRO and KPRO by up to four and seven times, respectively. For both procedures rehabilitation after surgery and total endoprosthesis decreased incidence of SSIs. The lower experience of the center was related to higher SSI incidence in HPRO in primary (1.5% vs. 0.9%) and in revision surgeries (3.8% vs. 2.1%), but in KPRO, lower experience only in primary surgeries was significantly associated with SSI. The cumulative incidence of post-discharge SSI in Poland is higher than in other European countries. Special attention should be paid to patients with chronic diseases.

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Polycyclic aromatic hydrocarbons (PAHs) are widespread environmental pollutants that are generated by the incomplete combustion of organic materials. The main anthropogenic sources of PAHs are the combustion of solid fuels for heating purposes, illegal waste incineration, road transport and industries based on fossil fuels. PAHs can easily enter the body because they are present in all elements of the environment, including water, soil, air, and food. Due to their ubiquitous presence, PAHs, may exert a harmful effect on human health. Assessing PAH exposure through biomonitoring mostly involve techniques to measure the concentration of 1-hydroxypyrene in human urine. Nevertheless, through recent progress in analytical techniques, other common metabolites of PAHs in human biospecimens can be detected. A scientific literature search was conducted to determine which hydroxy derivatives of PAHs are markers of PAHs exposure and to reveal the leading sources of these compounds. Techniques for analyzing biological samples to identify OH-PAHs are also discussed. The most frequently determined OH-PAH in human urine is 1-hydroxypyrene, the concentration of which reaches up to a dozen ng/L in urine. Apart from this compound, the most frequently determined biomarkers were naphthalene and fluorene metabolites. The highest concentrations of 1- and 2-hydroxynaphthalene, as well as 2-hydroxyfluorene, are associated with occupational exposure and reach approximately 30 ng/L in urine. High molecular weight PAH metabolites have been identified in only a few studies. To date, PAH metabolites in feces have been analyzed only in animal models for PAH exposure. The most frequently used analytical method is HPLC-FLD. However, compared to liquid chromatography, the LOD for gas chromatography methods is at least one order of magnitude lower. The hydroxy derivatives naphthalene and fluorene may also serve as indicators of PAH exposure.

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[This corrects the article DOI: 10.3389/fimmu.2022.1071204.].

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Background: Gemtuzumab ozogamicin (GO), one of the first targeted drugs used in oncology, consists of an anti-cluster of differentiation 33 (CD33) monoclonal antibody bound to a derivative of cytotoxic calicheamicin. After the drug withdrawn in 2010 due to a significantly higher rate of early deaths, GO regained approval in 2017 for the treatment of newly diagnosed, refractory, or relapsed acute myeloid leukemia (AML) in adults and children over 15 years of age. The objective of the study was a retrospective analysis of clinical characteristics, treatment outcomes, and GO toxicity profile in children with primary refractory or relapsed (R/R) AML treated in Poland from 2008 to 2022. Methods: Data were collected through the Polish Registry of Acute Myeloid Leukemia. From January 2008 to December 2022, 35 children with R/R AML were treated with GO in seven centers of the Polish Pediatric Leukemia and Lymphoma Study Group. Results: Most of the children (30 of 35) received only one GO cycle in combination with various chemotherapy cycles (IDA-FLA, DOXO-FLA, FLA, FLAG, and others). Eighteen children (51%) achieved complete remission (CR), 14 did not respond to treatment, and three progressed. GO therapy was followed by allogeneic hematopoietic stem cell transplantation (allo-HSCT) in 18 children in CR. The 5-year overall survival (OS) after GO therapy was 37.1% ± 8.7% for the total cohort. There was a trend toward a superior outcome in patients with strong expression of CD33 expression (over 50% positive cells) compared with that in patients with lower expression of CD33 (OS, 41.2% ± 11.9% versus 27.8% ± 13.2%; p = 0.5; 5-year event-free survival, 35.4% ± 11.6% versus 25.7% ± 12.3%; p = 0.5, respectively). Children under 15 years have better outcome (OS, 34.9% ± 10.4% versus 30% ± 14.5%, p = 0.3). The most common adverse events were bone marrow aplasia, fever of unknown origin, infections, and elevated liver enzyme elevation. Sinusoidal obstruction syndrome occurred in two children. Conclusions: The use of GO in severely pretreated children, including those under 15 years of age, with previous failure of AML treatment is a feasible and effective bridging therapy to allo-HSCT with an acceptable toxicity profile.

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BACKGROUND: Cardiovascular diseases including arterial hypertension are common comorbidities among patients hospitalized due to COVID-19. We assessed the influence of preexisting hypertension and its pharmacological treatment on in-hospital mortality in patients hospitalized with COVID-19. METHODS: We studied all consecutive patients who were admitted to the University Hospital in Krakow, Poland, due to COVID-19 between March 2020 and May 2021. Data of 5191 patients (mean age 61.9±16.7 years, 45.2% female) were analyzed. RESULTS: The median hospitalization time was 14 days, and the mortality rate was 18.4%. About a quarter of patients had an established cardiovascular disease including coronary artery disease (16.6%) or stroke (7.6%). Patients with hypertension (58.3%) were older and had more comorbidities than patients without hypertension. In multivariable logistic regression analysis, age above median (64 years), male gender, history of heart failure or chronic kidney disease, and higher C-reactive protein level, but not preexisting hypertension, were independent risk factors for in-hospital death in the whole study group. Patients with hypertension already treated (n=1723) with any first-line antihypertensive drug (angiotensin-converting enzyme inhibitors, angiotensin receptor blockers, beta-blockers, calcium channel blockers, or thiazide/thiazide-like diuretics) had a significantly lower risk of in-hospital death (odds ratio, 0.25 [95% CI, 0.2-0.3]; P<0.001) compared to nontreated hypertensives (n=1305). CONCLUSIONS: Although the diagnosis of preexisting hypertension per se had no significant impact on in-hospital mortality among patients with COVID-19, treatment with any first-line blood pressure-lowering drug had a profound beneficial effect on survival in patients with hypertension. These data support the need for antihypertensive pharmacological treatment during the COVID-19 pandemic.

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Knowledge about predictors associated with quality of life (QoL) in adolescents is important for public health. The aim of the study was to indicate determinants of the different dimensions of QoL in the fields of demographic, socio-economic factors, general health and lifestyle in a sample of Polish adolescents. The cross-sectional study was carried out in a southern region of Poland among 804 schoolchildren from junior high schools and upper secondary schools. The quality of life was measured using the Polish version of the KIDSCREEN-52 questionnaire. The author's questionnaire concerning determinants of the adolescents' quality of life was also used. In the analysis of the quality of life, standardized results on the European population (T-score) and categorization on the low, average and high quality of life were taken into account. Defining the possible determinants of the adolescents' quality of life was made by the multivariate logistic regression models. The highest prevalence of low QoL was observed in the school environment (53.4%) and the psychological well-being (51.6%) dimensions of the KIDSCREEN-52. The factors that increased the risk of the low assessment of the quality of life were, inter alia, female sex for physical well-being, psychological well-being, self-perception, autonomy, parent relation and home life, and financial resources, higher school year for physical well-being, psychological well-being, moods and emotions (2nd grade of upper secondary school only), self-perception, social support and peers, and school environment, and dissatisfaction in appearance for physical well-being, psychological well-being, moods and emotions, self-perception, school environment, social acceptance and bullying.

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Left ventricular hypertrophy (LVH) is associated with adverse clinical outcomes and implicates clinical decision-making. The aim of our study was to assess the importance of different approaches in the screening for LVH. We included patients who underwent cardiac magnetic resonance (CMR) imaging and had available chest radiograph in medical documentation. Cardiothoracic ratio (CTR), transverse cardiac diameter (TCD), clinical and selected electrocardiographic (ECG)-LVH data, including the Peguero-Lo Presti criterion, were assessed. CMR−LVH was defined based on indexed left ventricular mass-to-body surface area. Receiver operating characteristics analyses showed that both the CTR and TCD (CTR: area under the curve: [AUC] = 0.857, p < 0.001; TCD: AUC = 0.788, p = 0.001) were predictors for CMR−LVH. However, analyses have shown that diagnoses made with TCD, but not CTR, were consistent with CMR−LVH. From the analyzed ECG−LVH criteria, the Peguero-Lo Presti criterion was the best predictor of LVH. The best sensitivity for screening for LVH was observed when the presence of heart failure, ≥40 years in age (each is assigned 1 point), increased TCD and positive Peguero-Lo Presti criterion (each is assigned 2 points) were combined (CAR2E2 score ≥ 3 points). CAR2E2 score may improve prediction of LVH compared to other approaches. Therefore, it may be useful in the screening for LVH in everyday clinical practice in patients with prevalent cardiovascular diseases.

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OBJECTIVES: The answer to the question to what extent depressive symptoms which occur in the middle and late adolescence period affect the quality of life in adulthood. METHODS: The sample group consisted of 308 adults out of 3,445 who had participated in a 2000 study of prevalence of depressive symptoms among students. 17 years later, letters were sent to all study participants with information about the purpose of the study and an original questionnaire, with quality of life and quality of social network scales (the Collaborative Research on Ageing in Europe Social Network Index - COURAGE-SNI and WHOQOL-AGE) attached. RESULTS: The presence of depressive symptoms in the untreated population of adolescents is associated, in the case of women, with poorer education and fewer opportunities to work in adulthood compared to their non-depressive peers. In contrast, the men who were not depressive in adolescence take jobs in which they are more likely to earn a high income. An analysis of the quality of life showed statistically significant differences between men and women. In the group of non-depressive men, greater satisfaction with owned financial resources was observed. In the case of adult women, those who had been depressive in adolescence declared a sense of lower overall quality of life and satisfaction with the way of spending free time, satisfaction with achievement of life goals and owned financial means. Non-depressive women presented higher quality of social networks 17 years later. CONCLUSIONS: Long-term observation in our prospective study supports the hypothesis of a developmental character of adolescent depression.

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Clostridioides difficile is still one of the most common causes of hospital-acquired infectious diarrhea (CDI), and the incidence of CDI is one of the indicators that allows conclusions to be derived on the correctness of antibiotic administration. The objective of this observational study was the analysis of post-discharge CDI incidence in patients undergoing hip or knee arthroplasty, in order to specify optimum conditions for the surgical procedures and outpatient postoperative care. One-year observational study. Public Polish hospitals. Retrospective records for 83,525 surgery patients having undergone hip or knee arthroplasty were extracted from the Polish National Health Fund databases. CDI and/or antibiotic prescriptions in the 30 day post-surgery period were expressed per 1000 surgeries with antibiotic prescription on discharge or in ambulatory care, respectively. The CDI incidence rate was 34.4 per 10,000 patients, and 7.7 cases per 100,000 post-surgery patient-days. Patients who were prescribed at least one antibiotic were diagnosed with CDI more often than patients who had no antibiotic treatment (55.0/1000 patients vs. 1.8/1000 patients). In the multifactorial analysis, the following factors were significant: being at least 65 years of age, trauma as the cause of surgery, length of stay over 7 days, HAIs other than CDI and taking beta-lactams and/or quinolones but not macrolides in the post-discharge period. Postoperative antibiotic prescription in patients undergoing joint replacement surgery is the main risk factor for CDI. These observations indicate the necessity of improvement of infection control programs as the key factor for CDI prevention.

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INTRODUCTION: Alloplasty is one of the most frequently performed procedures, as it hugely improves the quality of life. OBJECTIVES: The purpose of this study was to determine the incidence, risk factors, and clinical implications of postdischarge pneumonia after hip endoprosthesis in Polish adults. PATIENTS AND METHODS: This retrospective study was conducted using the database of the National Health Fund (Narodowy Fundusz Zdrowia) containing data from 55 842 hip arthroplasties performed in 2017. RESULTS: Postdischarge pneumonia was identified in 371 patients and accounted for 26.6% of all postdischarge infections, with incidence rate of 0.7%. Multivariable analysis showed a significantly higher risk of pneumonia in patients aged 65 and older (odds ratio [OR], 3.5; 95% CI, 2.40-5.03), urgently admitted (OR, 4.0; 95% CI, 3.16-4.98), operated in winter (OR, 1.7; 95% CI, 1.37-2.11), and hospitalized in the intensive care unit (OR, 5.9; 95% CI, 3.65-9.46). Preventative factors were pre­surgery treatment for diseases of the musculoskeletal system (OR, 0.7; 95% CI, 0.59-0.91) and postoperative rehabilitation (both outpatient and inpatient; OR, 0.3; 95% CI, 0.10-0.99 and OR, 0.7; 95% CI, 0.42-0.99, respectively). Seventy patients (18.9% of pneumonia cases) required inpatient pneumonia treatment. The in­hospital case fatality rate observed in postdischarge pneumonia was 21.4%. CONCLUSIONS: Pneumonia is one of the most common postoperative infections after hip endoprosthesis, especially in winter, requiring rehospitalization. Efforts should be made to prepare patients in the perioperative period.

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OBJECTIVES: The aim of the pilot study was to compare the level of empathy among adolescents treated in a psychiatric day unit in groups with varied age, gender and type of disorder (conduct and emotional disorders and depressive-anxiety disorders). METHODS: The study was carried out in a group of 117 adolescents (69 girls and 48 boys) aged 13-20, treated in the Clinical Day Unit of the Department of Adult, Child and Adolescent Psychiatry of the University Hospital in Kraków between 2016-2021. The Davis Empathy Scale and the Cohen Empathy Scale were used for the study. RESULTS: Girls scored significantly higher compared to boys on the Cohen and Davis Empathy scales and on the Davis subscale: Personal Distress. Statistically significant interactions were observed for the factors of gender and age, as well as age and disorder type. Older boys had statistically significantly higher scores on the Davis Empathy Scale compared to younger boys, while the reverse pattern was observed for girls (non-significant). Older patients with conduct disorders had significantly lower Cohen's Empathy Scale scores compared to younger patients; the opposite pattern was observed in the group of patients with anxiety-depressive disorders (non-significant). CONCLUSIONS: Girls exhibit higher levels of affective and cognitive empathy than boys. The intensity of empathy increases with age in the group of boys, while for girls the obtained differences are not statistically significant. The intensity of empathy is significantly lower in the group of older adolescents (versus younger) with conduct and emotional disorders. Among depressive-anxiety disorders, the opposite pattern was noted (non-significant). The unique results obtained indicate a different trajectory of empathy development in the group of patients with conduct disorders and with depressive-anxiety disorders.

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Introduction: Healthcare workers (HCWs) from the beginning of the pandemic have been at risk of exposure to SARS-CoV-2, so they were vaccinated as first. Objectives: The purpose of the study was to determine the level of antibodies against SARS-CoV-2 in HCWs before and after vaccination with mRNA preparations according to previous COVID- 19. Patients and methods: The HCWs from the University Hospital in Krakow completed two surveys: the baseline survey before receiving the first dose of vaccine (in January 2021) and the follow-up survey in June 2021. In parallel, two blood samples were collected from each participant at baseline and at follow-up. Total anti-SARS-CoV-2 antibody levels were measured using the ECLIA technique. Results: At baseline, 41.1% of HCWs had positive antibody test results, and at follow-up, the vaccinated HCWs had almost 100 times higher antibody levels than the unvaccinated HCWs. Participants under 30 years of age had significantly higher antibody levels in June than older HCWs. Among participants with positive antibody test results in January, HCWs who had experienced asymptomatic COVID-19 had more than five times higher antibody levels in June than HCWs self-reported severe COVID-19. In total, 86.9% of HCWs received Comirnaty or Spikevax. The incidence rate of COVID-19 in the unvaccinated vs. vaccinated group was 13 times higher, 20.5% and 1.9% respectively. Conclusions: These results confirm the effectiveness of vaccination in the prevention of COVID-19 in HCWs. It is worth getting vaccinated regardless of previous infection. Furthermore, vaccination among HCWs under 30 years of age induced more effective antibody production compared to older individuals.

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INTRODUCTION: Multimorbidity has been recognized as an important factor in geriatric medicine. However, its importance for other specialists is still to be fully appreciated. OBJECTIVES: The aim of the study was to assess the prevalence and patterns of multimorbidity in older patients drawn from the general population. PATIENTS AND METHODS: The PolSenior was a nationwide, multicenter, cross-sectional survey of aged population in Poland. Questionnaire, physical examination, and laboratory data were gathered. Multimorbidity was defined as a coexistence of 2 and more chronic diseases or medical problems out of 17 identified. Factor analysis was employed to identify clusters of conditions. RESULTS: Of 4588 patients, 51.9% were men; 640 were aged 55 to 59 years; 3948, ≥65 years; and 1757, ≥80 years. Multimorbidity depended on age and sex, and was diagnosed in 70.9% of those aged 55 to 59 years, 88.4% of those aged 65 to 79 years, and 93.9% of those aged ≥80 years. Only 8.5% of participants aged 55 to 59, 2.2% aged 65 to 79 years, and 0.9% aged ≥80 years had no diagnosis of chronic disease. Hypertension, metabolic diseases, and obesity predominated in those aged 55 to 59 and 65 to 79 years, whereas hypertension, eye disorders, and cognitive impairment prevailed in the oldest group. The highest likelihood of multimorbidity was found in the youngest participants who had stroke, kidney disease, cancer, or a composite of Parkinson disease / epilepsy; in 65-to-79-year-olds with a history of stroke; and in ≥80-year-olds with a history of stroke or heart failure. CONCLUSIONS: The age-specific analysis of clustering revealed differences in prevalence and patterns of comorbidities, which stresses the importance of individual approach to older patients.

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Temporomandibular disorders includes abnormalities of the masticatory muscles, temporomandibular joints and the surrounding structures. The aim of the study was to carry out a retrospective assessment of the frequency of the pain form of TMD based on the analysis of medical records of patients treated at the Prosthodontic Department at Jagiellonian University in Kraków. MATERIAL AND METHODS: The study included the results of a medical history and a clinical examination of patients, who came for consultation at the Prosthodontics Department at Jagiellonian University in Krakow, due to pain of the masticatory muscles or/and TMJ and painless symptom of TMD like limitation of the jaw movements and joints' sounds. Out of all the analyzed results of the examination of treated patients, a group of patients with a painless and painful TMD was selected. RESULTS: The study involved the results of a detailed specialized functional examination of 334 patients (210 women and 124 men), ranging in age from 41 to 68 years. Analysis of the results of clinical examinations conducted in all patients revealed that 161 had the painless form - SG (99 women and 62 men) and 173 patients had the pain form of the TMD - CG (111 women and 62 men). In the CG 104 patients reported mostly pain in the masticatory muscles, while the remaining (69 patients) had a history of pain in one or simultaneously two TMJs. CONCLUSION: The analysis of the patients forms allows to conclude that more than half of patients seeking help are patients with the painful form of the TMD and these abnormalities occur more frequently in women than in men.

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Arthroplasty procedures are more frequently performed due to their impact on the quality of life. The aim of this study was to evaluate and analyze the Polish national datasets and registries for hip and knee arthroplasty across Poland in order to describe and understand the challenges for healthcare in an aging society. The study included national data on 83,525 hip or knee arthroplasties performed in 2017. Of those, 78,388 (93.8%, 63.0% females) were primary operations: 66.6% underwent hip replacement surgery (HPRO, mean age 68.43 years, SD 11.9), and 5137 were secondary operations (females: 62.9%), with 75.2% of those being HPRO (mean age 69.0 years, SD 12.0). The mean age of the patients undergoing knee surgery (KPRO) was 68.50 years (SD 8.2). The majority (79.9%) were scheduled. The main reason for hospitalization was arthrosis (84.2% in total, HPRO-76.5%, and KPRO-99.5%), then trauma (15.1%; p < 0.001). In 5137 cases (6.2%, 62.9% females) in revision surgery group, 75.2% underwent HPRO (mean age 69.0 years; SD12.0), and 24.8% KPRO (mean age 68.0 years; SD 10.5). Similarly, 71.1% were scheduled. The main reason for hospitalization was complications (total-90.9%, HPRO-91.4%, and KPRO-89.4%) (p < 0.001). Comorbidities were present (over 80%) with the level of influenza, hepatitis B vaccination, and pre-hospital rehabilitation not exceeding 8% each in both groups. Due to the increasing age of patients, implicating comorbidities, there is a need for better preparation prior to surgery.

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INTRODUCTION: The Dundee Ready Education Environment Measure (DREEM) is an instrument that assesses the educational environment. AIM: The aim of this study was to psychometrically evaluate a Polish version of the DREEM instrument. MATERIAL AND METHODS: 203 medical students who fully completed the DREEM questionnaire were included in the study. Validity was evaluated through the analysis of construct validity and reliability. RESULTS: After language validation the internal consistency was assessed. Cronbach's alpha for the overall score was 0.93 and the five subscales were: perceptions of learning 0.86, perceptions of teachers 0.82, perceptions of atmosphere 0.75, academic self-perceptions 0.61, and social-self perceptions 0.61. The exploratory factor analyses, however, yielded dimensions that did not fully correspond to the original DREEM subscales. CONCLUSIONS: Internal consistency of the Polish version of the DREEM scale as a whole was excellent, however for each of five originally developed subscales it was lower and vary a lot; construct validity of Polish version was not compatible with the original structure of the DREEM scale but was reasonable. A new five-factor solution obtained in this study could be a reliable tool for assessing the medical education environment in the Polish circumstances, but it will require confirmation in future study.

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