13 results on '"Korhonen N"'
Search Results
2. Recurrent and Metastatic Cutaneous Squamous Cell Carcinomas in a Cohort of 774 Patients in Finland
- Author
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Korhonen, N, primary, Ylitalo, L, additional, Luukkaala, T, additional, Itkonen, J, additional, Häihälä, H, additional, Jernman, J, additional, Snellman, E, additional, and Palve, J, additional
- Published
- 2020
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3. From athletic talent development to dual career development? A case study in a Finnish high performance sports environment.
- Author
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Nikander, J. A. O., Ronkainen, N. J., Korhonen, N., Saarinen, M., and Ryba, T. V.
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TALENT development ,ORGANIZATIONAL change ,YOUTH development ,SPORTS ,CORPORATE culture ,ACQUISITION of data ,SPORTS participation - Abstract
The focus of dual career (DC) research has shifted from exploring individual experiences within Athletic Talent Development Environments (ATDEs) toward understanding the impact of the environment and the broader cultural context on individuals' developmental trajectories in Dual Career Development Environments (DCDEs). To comply with national and EU recommendations for socially responsible elite sport, many successful ATDEs list DC as one of their primary values and advertise themselves as DCDEs in order to attract more athletes. The present study aimed to evaluate whether and how a talent development environment for youth athletes in Finland has transformed from an ATDE to DCDE by exploring the environment's success factors and organisational culture. This study is grounded in the theoretical framework of Holistic Ecological Approach and follows the Real-Time Case Method. Principal methods of data collection included interviews, observations, and documents. The results indicated that the environment was characterised by an incoherent organisational culture, and the environment was identified as an ATDE rather than a DCDE. We suggest that for the Finnish sports environment to successfully transform into a functioning DCDE, changes in the organisational culture are necessary and DC recommendations should be integrated into the environment to provide resources for student-athletes to develop a balanced life and the prerequisites to succeed in future endeavours. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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4. Characteristics and Trends of Cutaneous Squamous Cell Carcinoma in a Patient Cohort in Finland 2006-2015
- Author
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Korhonen, N, primary, Ylitalo, L, additional, Luukkaala, T, additional, Itkonen, J, additional, Häihälä, H, additional, Jernman, J, additional, Snellman, E, additional, and Palve, J, additional
- Published
- 2019
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5. Indoor temperature conditions and energy demand of a Finnish detached house in a changing climate
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Farahani Azin Velashjerdi, Jokisalo Juha, Korhonen Natalia, and Kosonen Risto
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Environmental sciences ,GE1-350 - Abstract
This study investigated the effect of passive strategies (orientation, thermal mass of building structure, window opening, and window properties) and the usage of an active cooling system on energy demand and indoor temperature conditions of a detached house in Finland in the current (TRY 2012) and future climatic conditions (2050). So that nine different cases were defined and simulated. The goal was to improve the indoor temperature conditions in the cooling season and analyze the effects of global warming on energy demand. Regarding the results of passive strategies, in the current climate, using openable windows would be the best solution for decreasing the cooling demand and providing acceptable indoor air temperature of the spaces. In this case, 96% of the time in the cooling season, the indoor temperature is below the maximum recommended indoor temperature (27 °C) of the thermal environment category III of the standard EN 15251 and EN 16798–1. While using an active cooling system in the hall of the upper floor, it is the only studied solution that can provide thermal comfort in all the spaces during the cooling season in both current and future climate based on the standards. In the future 2050 climate, the heating demand decreases much more than the amount of increase in the cooling demand. So that the total electricity demand of electrically heated detached houses in the future climate would be less than in the current climate.
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- 2021
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6. Recent Changes in the Incidence and Characteristics of Cutaneous Squamous Cell Carcinomas in Finland from 2006 to 2020: A Retrospective Cohort Study.
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Lounas M, Ylitalo L, Salmi T, Jernman J, Palve J, Luukkaala T, and Korhonen N
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- Humans, Finland epidemiology, Retrospective Studies, Male, Female, Incidence, Aged, Aged, 80 and over, Middle Aged, Adult, Time Factors, Sex Distribution, Age Distribution, Young Adult, Neoplasm Invasiveness, Adolescent, Child, Skin Neoplasms epidemiology, Skin Neoplasms pathology, Carcinoma, Squamous Cell epidemiology, Carcinoma, Squamous Cell pathology
- Abstract
Registers recording only 1 tumour per patient do not enable assessment of the real burden of cutaneous squamous cell carcinoma. To investigate recent changes in the incidence and characteristics of tumours, a retrospective 15-year patient cohort study was performed in Finland. Histopathological diagnoses of cutaneous squamous cell carcinomas diagnosed between 2016 and 2020 were obtained from the pathology database and clinical data from patient medical records and combined with previously collected data for the years 2006-2015. Altogether 1,472 patients with 2,056 tumours were identified. The crude incidence increased from 19/100,000 persons in 2006 to 42 in 2020 (p < 0.001), increasing most in people aged over 80 years. The percentage of tumours located on the trunk increased from 5.3% during the first 5-year period, 2006-2010, to 9.0% in 2016-2020. Also, the location of tumours was significantly different between men and women, as men had more tumours on the scalp and ears, and women on the lower limbs. A slight change in the tumours from poorly to well differentiated and a decrease in the invasion depth were noted between 2006 and 2020. As the burden of tumours continues to increase, more attention should be paid to their prevention.
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- 2024
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7. Skin Cancer Risk of Narrow-Band UV-B (TL-01) Phototherapy: A Multi-Center Registry Study with 4,815 Patients.
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Åkerla P, Pukkala E, Helminen M, Korhonen N, and Karppinen T
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- Humans, Cohort Studies, Phototherapy adverse effects, Skin Neoplasms epidemiology, Skin Neoplasms etiology, Melanoma epidemiology, Melanoma complications, Ultraviolet Therapy adverse effects, Psoriasis drug therapy, Carcinoma, Squamous Cell epidemiology, Carcinoma, Squamous Cell therapy, Carcinoma, Basal Cell epidemiology, Carcinoma, Basal Cell therapy
- Abstract
Narrow-band TL-01 ultraviolet B phototherapy (TL-01) is an effective and widely used treatment for many skin diseases. The purpose of the investigation was to assess the risk of skin cancers in patients treated with TL-01 phototherapy who have not received any other phototherapy modalities. This cohort study included 4,815 TL-01 treated patients in Finland with psoriasis or atopic dermatitis. Clinical information was collected from the hospital records and linked with Finnish Cancer Registry data. The follow-up started from the first TL-01 treatment and the mean follow-up time was 8.4 years. Standardized incidence ratios were calculated for basal cell carcinoma, cutaneous melanoma, and squamous cell carcinoma. The standardized incidence ratio for basal cell carcinoma was 2.5 (95% confidence interval 1.8-3.5), for cutaneous melanoma 4.0 (95% confidence interval 2.1-6.8) and for squamous cell carcinoma 3.7 (95% confidence interval 1.7-7.0). For basal cell carcinoma and squamous cell carcinoma, the standardized incidence ratios remained similar during the whole follow-up time while the standardized incidence ratio for cutaneous melanoma was markedly higher during the first 5 years of follow-up. In conclusion, an increased incidence of skin cancers was observed among TL-01 treated patients. It should be confirmed in the future whether the skin cancer risk of TL-01 phototherapy will remain high in a longer follow-up.
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- 2024
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8. Premalignant lesions, basal cell carcinoma and melanoma in patients with cutaneous squamous cell carcinoma.
- Author
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Korhonen N, Ylitalo L, Luukkaala T, Itkonen J, Häihälä H, Jernman J, Snellman E, and Palve J
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- Aged, Aged, 80 and over, Carcinoma, Basal Cell pathology, Carcinoma, Squamous Cell pathology, Female, Finland epidemiology, Follow-Up Studies, Humans, Keratosis, Actinic pathology, Male, Melanoma pathology, Middle Aged, Neoplasm Invasiveness, Neoplasms, Multiple Primary pathology, Prevalence, Risk Assessment statistics & numerical data, Risk Factors, Skin pathology, Skin Neoplasms pathology, Carcinoma, Basal Cell epidemiology, Carcinoma, Squamous Cell epidemiology, Keratosis, Actinic epidemiology, Melanoma epidemiology, Neoplasms, Multiple Primary epidemiology, Skin Neoplasms epidemiology
- Abstract
The incidence of keratinocyte carcinomas is increasing worldwide and currently there is no standardised strategy for the follow-up of patients with multiple tumours. The objective of this study was to assess the prevalence of premalignant lesions, i.e., actinic keratosis and Bowen's disease, as well as basal cell carcinoma (BCC) and cutaneous melanoma (CM) among patients with cutaneous squamous cell carcinoma (cSCC). Pathology database search was performed to identify all cSCC patients diagnosed in the Pirkanmaa region of Finland in 2006-2015. Details of the patients and tumours were obtained through medical record review. The cohort consisted of 774 patients with 1131 cSCC tumours. Overall 559 patients (72%) had premalignant lesions. A total of 316 patients (41%) had BCC and 52% of these (n = 164) had more than one BCC tumour. 50 patients (6%) had CM. Overall 180 cSCC patients (23%) had no premalignant changes, BCC or CM. The median age of these patients was 6 years less than that of the patients with premalignant lesions (p < 0.001) or BCC (p < 0.001). The invasion depth of the tumours was deeper in the patients with only cSCC (median 3 mm, interquartile range 2-6) than in those with premalignant lesions or BCC (median 2 mm, interquartile range 1-3), p < 0.001. CSCC patients have a high risk of developing multiple skin cancers and need long-term follow-up., (© 2020. The Author(s).)
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- 2021
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9. Acute Lysergic Acid Diethylamide Does Not Influence Reward-Driven Decision Making of C57BL/6 Mice in the Iowa Gambling Task.
- Author
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Elsilä LV, Korhonen N, Hyytiä P, and Korpi ER
- Abstract
While interest in psychedelic drugs in the fields of psychiatry and neuroscience has re-emerged in recent last decades, the general understanding of the effects of these drugs remains deficient. In particular, there are gaps in knowledge on executive functions and goal-directed behaviors both in humans and in commonly used animal models. The effects of acute doses of psychedelic lysergic acid diethylamide (LSD) on reward-driven decision making were explored using the mouse version of the Iowa Gambling Task. A total of 15 mice were trained to perform in a touch-screen adaptation of the rodent version of the Iowa Gambling Task, after which single acute doses of LSD (0.025, 0.1, 0.2, 0.4 mg/kg), serotonin 2A receptor-selective agonist 25CN-NBOH (1.5 mg/kg), d-amphetamine (2.0 mg/kg), and saline were administered before the trial. 25CN-NBOH and the three lowest doses of LSD showed no statistically significant changes in option selection or in general functioning during the gambling task trials. The highest dose of LSD (0.4 mg/kg) significantly decreased premature responding and increased the omission rate, but had no effect on option selection in comparison with the saline control. Amphetamine significantly decreased the correct responses and premature responding while increasing the omission rate. In conclusion, mice can perform previously learned, reward-driven decision-making tasks while under the acute influence of LSD at a commonly used dose range., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2020 Elsilä, Korhonen, Hyytiä and Korpi.)
- Published
- 2020
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10. Sentinel node tumor burden in prediction of prognosis in melanoma patients.
- Author
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Palve J, Ylitalo L, Luukkaala T, Jernman J, and Korhonen N
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- Aged, Chemotherapy, Adjuvant, Female, Follow-Up Studies, Humans, Lymph Node Excision statistics & numerical data, Lymphatic Metastasis therapy, Male, Melanoma pathology, Melanoma therapy, Middle Aged, Prognosis, Proportional Hazards Models, Retrospective Studies, Risk Assessment, Sentinel Lymph Node surgery, Sentinel Lymph Node Biopsy statistics & numerical data, Skin Neoplasms pathology, Skin Neoplasms therapy, Lymphatic Metastasis pathology, Melanoma mortality, Sentinel Lymph Node pathology, Skin Neoplasms mortality, Tumor Burden
- Abstract
Recent data have demonstrated no survival benefit to immediate completion lymph node dissection (CLND) for positive sentinel node (SN) disease in melanoma. It is important to identify parameters in positive SNs, which predict prognosis in melanoma patients. These might provide prognostic value in staging systems and risk models by guiding high-risk patients' adjuvant therapy in clinical practice. In this retrospective study of university hospital melanoma database we analyzed tumor burden and prognosis in patients with positive SNs. Patients were stratified by the diameter of tumor deposit, distribution of metastatic focus in SN, ulceration and number of metastatic SNs. These were incorporated in Cox proportional hazard regression models. Predictive ability was assessed using Akaike information criterion and Harrell's concordance index. A total of 110 patients had positive SN and 104 underwent CLND. Twenty-two (21%) patients had non-SN metastatic disease on CLND. The 5-year melanoma specific survival for CLND-negative patients was 5.00 years (IQR 3.23-5.00, range 0.72-5.00) compared to 3.69 (IQR 2.28-4.72, range 1.01-5.00) years in CLND-positive patients (HR 2.82 (95% CI 1.17-6.76, p = 0.020).The models incorporating distribution of metastatic focus and the largest tumor deposit in SN had highest predictive ability. According to Cox proportional hazard regression models, information criterions and c-index, the diameter of tumor deposit > 4 mm with multifocal location in SN despite of number of metastatic SN were the most important parameters. According to the diameter of tumor deposit and distribution of metastatic focus in SN, adequate stratification of positive SN patients was possible and risk classes for patients were identified.
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- 2020
- Full Text
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11. Fall-induced fractures of the calcaneus and foot in older people: nationwide statistics in Finland between 1970 and 2013 and prediction for the future.
- Author
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Kannus P, Niemi S, Sievänen H, Korhonen N, and Parkkari J
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- Aged, Aged, 80 and over, Female, Finland epidemiology, Humans, Incidence, Male, Middle Aged, Accidental Falls statistics & numerical data, Calcaneus injuries, Foot Injuries epidemiology, Fractures, Bone epidemiology
- Abstract
Background: Although fall-induced fractures of elderly persons are a major problem, epidemiologic knowledge on their time trends is limited. We assessed the trends in fall-induced fractures of the calcaneus and foot in older Finns between 1970 and 2013., Methods: The current trends in the number and incidence (per 100,000 persons) of fall-induced fractures of the calcaneus and foot of older Finns were determined by taking into account individuals 50-year-olds or older who were admitted to Finnish hospitals for primary treatment of such injury in 1970-2013., Results: The number and raw incidence of these fractures increased considerably between 1970 and 2013, from 64 (number) and 5.6 (incidence) in 1970, to 325 and 15.0, respectively, in 2013. The age-adjusted incidence of fracture was higher in men than women and showed a clear rise in both sexes in 1970-2013, from 7.2 to 15.2 in men (111% increase), and from 4.3 to 13.9 in women (223% increase). A similar rise was observed in the age-specific incidences. If trends in the age-specific fracture incidence continue at the same rate as were observed in 1970-2013, and the 50-year-old or older population increases as predicted (by 15% by the year 2030), the annual number of fall-induced fractures of the calcaneus and foot in this population will be 1.8 times higher in the year 2030 (580 fractures) than it was in 2013 (325 fractures)., Conclusions: The number of fall-induced fractures of the calcaneus and foot among Finns 50 years of age or older has risen sharply between 1970 and 2013 with a rate that cannot be explained merely by demographic changes. Further studies should examine the reasons for the rise and possibilities for fracture prevention.
- Published
- 2016
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12. Human population dynamics in Europe over the Last Glacial Maximum.
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Tallavaara M, Luoto M, Korhonen N, Järvinen H, and Seppä H
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- Adaptation, Physiological, Algorithms, Biological Evolution, Computer Simulation, Ecosystem, Europe, Geography, Humans, Models, Theoretical, Population Density, Time Factors, Climate, Climate Change, Ice Cover, Population Dynamics
- Abstract
The severe cooling and the expansion of the ice sheets during the Last Glacial Maximum (LGM), 27,000-19,000 y ago (27-19 ky ago) had a major impact on plant and animal populations, including humans. Changes in human population size and range have affected our genetic evolution, and recent modeling efforts have reaffirmed the importance of population dynamics in cultural and linguistic evolution, as well. However, in the absence of historical records, estimating past population levels has remained difficult. Here we show that it is possible to model spatially explicit human population dynamics from the pre-LGM at 30 ky ago through the LGM to the Late Glacial in Europe by using climate envelope modeling tools and modern ethnographic datasets to construct a population calibration model. The simulated range and size of the human population correspond significantly with spatiotemporal patterns in the archaeological data, suggesting that climate was a major driver of population dynamics 30-13 ky ago. The simulated population size declined from about 330,000 people at 30 ky ago to a minimum of 130,000 people at 23 ky ago. The Late Glacial population growth was fastest during Greenland interstadial 1, and by 13 ky ago, there were almost 410,000 people in Europe. Even during the coldest part of the LGM, the climatically suitable area for human habitation remained unfragmented and covered 36% of Europe.
- Published
- 2015
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13. Biodegradation of ibuprofen, diclofenac and carbamazepine in nitrifying activated sludge under 12 °C temperature conditions.
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Kruglova A, Ahlgren P, Korhonen N, Rantanen P, Mikola A, and Vahala R
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- Biodegradation, Environmental, Carbamazepine metabolism, Diclofenac chemistry, Finland, Ibuprofen chemistry, Nitrification, Sewage microbiology, Water Pollutants, Chemical chemistry, Carbamazepine analysis, Cold Temperature, Diclofenac analysis, Ibuprofen analysis, Sewage chemistry, Waste Disposal, Fluid methods, Water Pollutants, Chemical analysis
- Abstract
Pharmaceuticals constitute a well-known group of emerging contaminants with an increasing significance in water pollution. This study focuses on three pharmaceuticals extensively used in Finland and which can be found in environmental waters: ibuprofen, diclofenac and carbamazepine. Biodegradation experiments were conducted in a full-scale Wastewater Treatment Plant (WWTP) and in laboratory-scale Sequencing Batch Reactors (SBRs). The SBRs were operated at 12 °C, with a sludge retention time (SRT) 10-12 d and organic loading rates (OLRs) of 0.17, 0.27 and 0.33 kg BOD7 m(-3) d(-1). Ibuprofen was found to biodegrade up to 99%. The biodegradation rate constants (k(biol)) for ibuprofen were calculated for full-scale and laboratory processes as well as under different laboratory conditions and found to differ from 0.9 up to 5.0 l g(SS)(-1) d(-1). Diclofenac demonstrated an unexpected immediate drop of concentration in three SBRs and partial recovery of the initial concentration in one of the reactors. High fluctuating in diclofenac concentration was presumably caused by removal of this compound under different concentrations of nitrites during development of nitrifying activated sludge. Carbamazepine showed no biodegradation in all the experiments., (Copyright © 2014 Elsevier B.V. All rights reserved.)
- Published
- 2014
- Full Text
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