Publications by authors named "Pawel Wojciak"

Article Synopsis
  • This study examines how various factors like negative symptoms, processing speed, and emotion recognition influence functional outcomes in individuals with schizophrenia.
  • Researchers used different scales and tests to assess symptoms and cognitive abilities in 150 subjects across Europe, analyzing their impact on daily functioning.
  • Findings revealed that negative symptoms, particularly expressive and motivational deficits, significantly mediate the effects of cognitive impairments on real-life functioning, indicating specific pathways for improving outcomes in patients.
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: Currently, the increase in the percentage of obese people observed along with the development of civilization, reaching the level of a global pandemic, has forced a search for methods of effective and permanent obesity treatment. Obesity is a multifactorial disease; it coexists with many disease entities and requires multidisciplinary treatment. Obesity leads to metabolic changes in the form of metabolic syndromes, which include, among others, atherogenic dyslipidemia.

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Background: Negative symptoms are usually evaluated with scales based on observer ratings and up to now self-assessments have been overlooked. The aim of this paper was to validate the Self-evaluation of Negative Symptoms (SNS) in a large European sample coming from 12 countries. We wanted to demonstrate: (1) good convergent and divergent validities; (2) relationships between SNS scores and patients' functional outcome; (3) the capacity of the SNS compared to the Brief Negative Symptom Scale (BNSS) to detect negative symptoms; and (4) a five-domain construct in relation to the 5 consensus domains (social withdrawal, anhedonia, alogia, avolition, blunted affect) as the best latent structure of SNS.

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The relationship between negative symptoms and neurocognitive performance in schizophrenia is well documented, but the mechanism of these connections remains unclear. The study aims to measure the relationship between the results on the new scales for the assessment of negative symptoms such as Brief Negative Symptom Scale (BNSS) and Self-evaluation of Negative Symptoms (SNS), and the results of some neurocognition tests. The second aim is to assess a possible gender effect on these associations.

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The aim of the study was to assess the impact of individual components of the metabolic syndrome on the human body, taking into account their etiology and pathogenesis. This article is analytical analysis of scientific and medical literature basing on aspects of the etiology and pathogenesis of the metabolic syndrome. The key role in the pathogenesis of the metabolic syndrome is played by insulin resistance, which may be a result of lifestyle conditions (low physical activity, overweight or obesity) or genetic background.

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Background: The aim of the current study was to explore the effect of gender, age at onset, and duration on the long-term course of schizophrenia.

Methods: Twenty-nine centers from 25 countries representing all continents participated in the study that included 2358 patients aged 37.21 ± 11.

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Schizophrenia is an illness with a large variety of symptoms, significant variability of the individual course, and still not fully explained etiology. It is suggested that genetic, infectious and immunological factors may be involved, and neurodevelopmental, neurodegenerative and neurotransmitter hypotheses have been proposed. Detection of the measurable and reproducible biological indicators of the clinical picture and the course, referred to as biomarkers, may be essential to elucidate the etiopathogenic mechanism of the illness.

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Objectives: Negative symptoms of schizophrenia can be related to metabolic abnormalities. The study aimed to assess negative symptoms using the Positive and Negative Syndrome Scale (PANSS) and the Brief Negative Symptoms Scale (BNSS), and their relationship with body mass index (BMI) and lipid indices, in male and female schizophrenic patients.

Methods: Fifty chronic schizophrenia patients (29 males, 21 females) were included.

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Objective: Negative symptoms of schizophrenia can be related to social cognition. The aim was to measure a relationship between the results on the new scales for the assessment of negative symptoms such as the Brief Negative Symptom Scale (BNSS) and Self-evaluation of Negative Symptoms (SNS), and the measures of social cognition.

Methods: The study included 80 patients (40 men, 40 women) with schizophrenia, aged 19-63 (mean 38 years), during the improvement period.

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Background: The aim of the current study was to explore the changing interrelationships among clinical variables through the stages of schizophrenia in order to assemble a comprehensive and meaningful disease model.

Methods: Twenty-nine centers from 25 countries participated and included 2358 patients aged 37.21 ± 11.

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Introduction: The worldwide outbreak of morbid obesity forced contemporary medicine to adopt a multidisciplinary approach, which led to the description of metabolic syndrome (MS): a disease with self-aggravating components and one of the most important causes of morbidity and mortality. The need for therapeutic methods provoked development of metabolic surgery, which nowadays give possibilities for safe and effective treatment of all MS aspects simultaneously and improves many obesity-related comorbidities.

Aim: To assess the laparoscopic sleeve gastrectomy (LSG) procedure's efficiency in resolving MS components, treating comorbidities and to analyze the influence on certain biochemical markers in 1-year follow-up.

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Introduction: A specific clinically relevant staging model for schizophrenia has not yet been developed. The aim of the current study was to evaluate the factor structure of the PANSS and develop such a staging method.

Methods: Twenty-nine centers from 25 countries contributed 2358 patients aged 37.

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Objectives: The aim of the study was to create a Polish version of the Self-evaluation of NegativeSymptoms (SNS) scale, to assess its internal consistency, and to make correlations between the SNS scores and the Brief Negative Symptom Scale (BNSS) scores in the group of patients with schizophrenia.

Material And Methods: The procedure of Polish adaptation of the French-language version of the SNS scale, comprising 20 items organized in 5 subscales: asociality, blunted affect, alogia, avolition and anhedonia, was carried out. Psychometric tests were performed in 40 patients with paranoid schizophrenia (20 men and 20 women) with severity of symptoms on the Positive and Negative Syndrome Scale (PANSS) 56±16 points, receiving unchanged pharmacological treatment in the last 3 months.

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Objectives: To create a Polish adaptation of the Brief Negative Symptom Scale (BNSS), to assess the internal consistency of the Polish version of the BNSS, and to make correlations between the BNSS scores and the Positive and Negative Syndrome Scale (PANSS) in the group of patients with schizophrenia.

Methods: The procedure of Polish adaptation of the assessment form (Scoresheet) of the BNSS, comprising 13 items organized in 6 subscales (anhedonia, lack of proper distress, asociality, avolition, blunted affect, and alogia), as well as the Manual and the Workbook of the scale was carried out. Psychometric tests were performed in 40 patients with paranoid schizophrenia (20 men and 20 women), aged 44±13 years, with illness duration of 17±10 years, and severity of symptoms on the PANSS 56±16 points, receiving unchanged pharmacological treatment in the last three months.

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Negative symptoms represent an unmet need of treatment in schizophrenia. Although a consensus exists on negative symptom construct, and second generation assessment instruments reflecting the consensus are available, studies still rely upon old assessment instruments, that do not reflect recent conceptualizations and might limit progress in the search for effective treatments. This is often the case in the European context, where one of the challenges encountered in designing large studies is the availability of validated instruments in the many languages of the continent.

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Negative symptoms of schizophrenia constitute a serious diagnostic and therapeutic problem. They substantially account for the impairment of health, social functioning and quality of life whereas treatment is difficult. In this paper the development of the concept of schizophrenia and negative symptoms is presented.

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Clinical staging is a tool useful in medical sciences. It assumes the presence of three key elements. Firstly, pathologic indices are progressing in subsequent stages.

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Oxytocin and vasopressin, "peptides of love and fear", except for their classic role in control of labor and breastfeeding and blood pressure regulation, are also implicated in various processes like sexual behaviours, social recognition and stress response. These hormones seems to be essential for appropriate and beneficial social interactions, play a very important role in maternal care and closeness, promote general trust and cooperation and prolong social memory. They also play a very important role in modulating fear and anxiety response, especially by regulating the hypothalamic-pituitary-adrenal axis and amygdala activity by its projections to the brain stem and hypothalamic structures.

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Aim: The aim of the study was to examine the activity of selected cytokines in bipolar patients during manic and depressive episodes and in remission.

Method: The cytokine status was assessed in 76 bipolar patients, 35 with mania- and 41 with depression. For cytokine measurements blood samples were drawn from each patient twice-- while in an acute episode and in remission.

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Objectives: The aim of the study was to examine the cytokine status in bipolar patients during immediate remission after acute episodes of mania or depression and in patients with sustained (≥6 months) remission, compared with healthy controls.

Methods: The study was performed on 121 bipolar patients, of whom 35 were in immediate remission after mania, 41 were in immediate remission after depression, and 45 were in >6-month remission on lithium monotherapy or lithium combined with other drugs. The control group consisted of 78 healthy individuals without any history of psychiatric or immunological illnesses.

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Aim: The evaluation of the activity of selected elements of the immune system in depression.

Method: Lymphocyte subsets evaluation (CD3+, CD4+, CD8+, CD16+, CD19+, CD4/CD8) was performed in 32 patients with depression (21 women and 11 men in the age from 21 to 66 years) using the flow cytometry method. The cytokine evaluation (sIL-2R, IL-4, IL-6) was performed in 39 patients with depression (23 women and 16 men in the age from 21 to 66 years) using the ELISA method.

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