Piotr Waz

Prof. Dr. Piotr Waz

Department of Nuclear Medicine, Medical University of Gdańsk, 80-210 Gdańsk, Poland

Research Focus & Metrics

Academic Career Length

31Years (1996-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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31 December 2019 in Neurologia i Neurochirurgia Polska
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Journal Article
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MSMichał Jakub Schinwelski
Michał Jakub Schinwelski
Emilia Jadwiga SitekEmilia Jadwiga Sitek
Emilia Jadwiga Sitek
Piotr WazPiotr Waz
Piotr Waz
JSJarosław Sławek
Jarosław Sławek
Background and aims. The present study aimed to assess the frequency of spasticity in a single-centre cohort of stroke patients in a one-year follow-up, its predictors, and its impact on the activities of daily living (ADL) and health-related quality of life (HRQoL). Material and methods. A group of 121 consecutive patients with hemiparesis (aged 73 ± 11 years) was selected for further observation, out of 381 Stroke Department patients during one year. At three follow-up assessments three, six and 12 months after stroke, muscle tone and muscle weakness were rated using Modified Ashworth Scale (MAS) and Medical Research Council (MRC); Activities of Daily Living (ADL) and Health Related Quality of Life (HRQoL) were evaluated using the Barthel Index (BI), Modified Rankin Scale (mRS) and an SF-36 questionnaire. Results. Fifty five of 121 (45%) patients after three months had developed spasticity (MAS ≥ 1), and in 19 of the 121 (15%) this spasticity was severe. After one year, 33/94 (35%) patients showed spasticity, and in 19/94 (20%) it was severe. Baseline muscle weakness (MRC), stroke severity as measured by the National Institutes of Health Stroke Scale (NIHSS), and greater disability (BI), were the most significant predictors of persistent post-stroke spasticity. Patients with spasticity had worse HRQoL in terms of their physical functioning, role limitations, physical pain, and vitality. Conclusion. Spasticity, which affects a significant proportion of stroke survivors, was present in 35% of our patients at 12 months after stroke. It has a major impact on both ADL and HRQoL. Severe disability and muscle weakness are the most important predictors of persistent post-stroke spasticity. Background and aims. The present study aimed to assess the frequency of spasticity in a single-centre cohort of stroke patients in a one-year follow-up, its predictors, and its impact on the activities of daily living (ADL) and health-related quality of life (HRQoL). Material and methods. A group of 121 consecutive patients with hemiparesis (aged 73 ± 11 years) was selected for further observation, out of 381 Stroke Department patients during one year. At three follow-up assessments three, six and 12 months after stroke, muscle tone and muscle weakness were rated using Modified Ashworth Scale (MAS) and Medical Research Council (MRC); Activities of Daily Living (ADL) and Health Related Quality of Life (HRQoL) were evaluated using the Barthel Index (BI), Modified Rankin Scale (mRS) and an SF-36 questionnaire. Results. Fifty five of 121 (45%) patients after three months had developed spasticity (MAS ≥ 1), and in 19 of the 121 (15%) this spasticity was severe. After one year, 33/94 (35%) patients showed spasticity, and in 19/94 (20%) it was severe. Baseline muscle weakness (MRC), stroke severity as measured by the National Institutes of Health Stroke Scale (NIHSS), and greater disability (BI), were the most significant predictors of persistent post-stroke spasticity. Patients with spasticity had worse HRQoL in terms of their physical functioning, role limitations, physical pain, and vitality. Conclusion. Spasticity, which affects a significant proportion of stroke survivors, was present in 35% of our patients at 12 months after stroke. It has a major impact on both ADL and HRQoL. Severe disability and muscle weakness are the most important predictors of persistent post-stroke spasticity.

6 July 2007 in Chemical Physics Letters
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Journal Article
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DBDorota Bielinska-Waz
Dorota Bielinska-Waz
TCTimothy Clark
Timothy Clark
Piotr WazPiotr Waz
Piotr Waz
WNWieslaw Nowak
Wieslaw Nowak
ANAshesh Nandy
Ashesh Nandy

1 April 2016 in Patient Preference and Adherence
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Journal Article
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Katarzyna ZorenaKatarzyna Zorena
Katarzyna Zorena
BKBeata Kowalewska
Beata Kowalewska
MSMałgorzata Szmigiero-Kawko
Małgorzata Szmigiero-Kawko
Piotr WazPiotr Waz
Piotr Waz
MMMałgorzata Myśliwiec
Małgorzata Myśliwiec
Objective: To conduct qualitative and quantitative assessment of yeast-like fungi in the feces of children and adolescents with type 1 diabetes mellitus (T1DM) with respect to their metabolic control and duration of the disease. Materials and methods: The studied materials included samples of fresh feces collected from 53 children and adolescents with T1DM. Control group included 30 age- and sex-matched healthy individuals. Medical history was taken and physical examination was conducted in the two study arms. Prevalence of the yeast-like fungi in the feces was determined as well as their amounts, species diversity, drug susceptibility, and enzymatic activity. Results: The yeast-like fungi were found in the samples of feces from 75.4% of T1DM patients and 70% controls. In the group of T1DM patients, no correlation was found between age (Rs=0.253, P=0.068), duration of diabetes (Rs=−0.038, P=0.787), or body mass index (Rs=0.150, P=0.432) and the amount of the yeast-like fungi isolated in the feces. Moreover, no correlation was seen between the amount of the yeast-like fungi and glycated hemoglobin (Rs=0.0324, P=0.823), systolic blood pressure (Rs=0.102, P=0.483), or diastolic blood pressure (Rs=0.271, P=0.345). Conclusion: Our research has shown that children and adolescents with T1DM show higher species diversity of the yeast-like fungi, with Candida albicans being significantly less prevalent versus control subjects. Moreover, fungal species in patients with T1DM turn out to be more resistant to antifungal treatment.

11 July 2020 in Pain Research and Management
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Journal Article
Open access
ZSZofia Sotomska
Zofia Sotomska
KWKarolina Wójcik-Bilkiewicz
Karolina Wójcik-Bilkiewicz
ASAgnieszka Sobierajska-Rek
Agnieszka Sobierajska-Rek
MGMagdalena Emilia Grzybowska
Magdalena Emilia Grzybowska
Piotr WazPiotr Waz
Piotr Waz
Katarzyna ZorenaKatarzyna Zorena
Katarzyna Zorena
Purpose. The aim of the research was to conduct an assessment of the prevalence of dysmenorrhea and associated factors among Polish women. Patients and Methods. A cross-sectional study was conducted among Polish women using an online questionnaire. The mean age of the participants was 23 ± 4 years. Out of the total of 1,317 women who took part in the study, 1,127 were included in the analysis, and 190 were excluded due to incomplete answers. The questionnaire consisted of 19 questions that were grouped into three parts. The first concerned sociodemographic data such as age, weight, education, and residence (urban or rural). The second part of the questionnaire pertained to the factors of dysmenorrhea (premenstrual syndrome, age of menarche, and family history of dysmenorrhea.). In the third part, the women were asked about their diet, alcohol intake, cigarette smoking, and physical activity. Results. Dysmenorrhea affected 94% of the interviewed women. Dysmenorrhea was most likely to occur among respondents whose mothers had a history of dysmenorrhea (p<0.005). Significant relationship between the occurrence of dysmenorrhea among respondents and their sisters was also observed (p<0.005). The prevalence of premenstrual syndrome (PMS) was significantly higher in women reporting dysmenorrhea (p<0.005). Other significant factors associated with dysmenorrhea were age of menarche (p<0.005), stress frequency (p=0.005), lack of physical activity (p=0.037), and self-esteem (p=0.042). However, in the respondents, no significant relationship was observed between dysmenorrhea and diet, smoking, body mass index, and alcohol intake. Conclusion. The study points to the fact that the problem of dysmenorrhea affects many Polish women. Women with dysmenorrhea were characterized with a family history of dysmenorrhea, occurrence of PMS, early age of menarche, stressful lifestyle, lack of physical activity, and low self-esteem. We suggest that further assessment of factors contributing for dysmenorrhea among women is necessary.

1 July 2019 in Parkinsonism & Related Disorders
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Journal Article
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JDJaroslaw Dulski
Jaroslaw Dulski
MSMichał Schinwelski
Michał Schinwelski
AKAgnieszka Konkel
Agnieszka Konkel
KGKarol Grabowski
Karol Grabowski
WLWitold Libionka
Witold Libionka
JSJarosław Sławek
Jarosław Sławek

1 August 2007 in Chemical Physics Letters
Verified
Journal Article
Closed access
DBDorota Bielinska-Waz
Dorota Bielinska-Waz
WNWieslaw Nowak
Wieslaw Nowak
Piotr WazPiotr Waz
Piotr Waz
ANAshesh Nandy
Ashesh Nandy
TCTimothy Clark
Timothy Clark