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    Wyświetlanie 1-14 z 14
    Tytuł:
    On the choice of parameters of change-point detection with application to stock exchange data
    Autorzy:
    Jaworski, Stanisław
    Furmańczyk, Konrad
    Powiązania:
    https://bibliotekanauki.pl/articles/453355.pdf
    Data publikacji:
    2011
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
    Tematy:
    V-Box Chart
    mini-max rule, normal
    distribution
    Opis:
    Our paper is devoted to the study of V-Box Chart method in a parametric model. This algorithm is proposed to be used in the change-point detection in a sequence of observations. The choice of parameters in such an algorithm is heuristic. In our paper we use the mini-max rule for this choice and we control the probability that no signal is given, when the process is out of control as well as the probability of false alarm. We apply this algorithm to the detection of a change in stock exchange data.
    Źródło:
    Metody Ilościowe w Badaniach Ekonomicznych; 2011, 12, 1; 87-96
    2082-792X
    Pojawia się w:
    Metody Ilościowe w Badaniach Ekonomicznych
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Unemployment rate for various countries since 2005 to 2012: comparison of its level and pace using functional principal component analysis
    Autorzy:
    Jaworski, Stanisław
    Furmańczyk, Konrad
    Powiązania:
    https://bibliotekanauki.pl/articles/453714.pdf
    Data publikacji:
    2012
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
    Tematy:
    B-splines basis system
    functional principal component analysis,
    unemployment rate
    Opis:
    We apply the functional principal component analysis to compare the unemployment rate in euro area, Japan and USA since 2005 to 2012. For preprocessing analysis we used B-splines system with roughness penalty for smoothing the data. The analysis enables to reveal the most important type of variation in unemployment rate and its pace's in examined countries.
    Źródło:
    Metody Ilościowe w Badaniach Ekonomicznych; 2012, 13, 2; 40-47
    2082-792X
    Pojawia się w:
    Metody Ilościowe w Badaniach Ekonomicznych
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The quantile estimation of the maxima of sea levels
    Autorzy:
    Dudziński, Marcin
    Furmańczyk, Konrad
    Powiązania:
    https://bibliotekanauki.pl/articles/453826.pdf
    Data publikacji:
    2011
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
    Tematy:
    quantile estimation
    frequentistic confidence interval
    Bayesian confidence interval
    peaks over threshold (POT)"
    Opis:
    The hydrological modeling has become an intensively studied subject in recent years. One of the most significant problems concerning this issue is to provide the mathematical and statistical tools, which allow to forecast extreme hydrological events, such as severe sea or river floodings. The extreme events on water have huge social and economic impact on the affected areas. Due to these reasons, each country has to protect itself against the flood danger, and consequently, the designing of reliable flood defences is of great importance to the safety of the region. For example, the sea dikes along the Dutch coastline are designed to withstand floods, which may occur once every 10 000 years. It means that the height of the dike is determined in such a way that the probability of the event that there is a flood in a given year equals 10-4. The computation of such the height level requires the estimation of the corresponding quantiles of the distributions of certain maxima of sea levels. In our paper, we present the procedures, which lead to the estimation of such the quantiles. We are mainly concerned with the interval estimation; in this context, we present the frequentistic and Bayesian approaches in constructing the desired confidence intervals.
    Źródło:
    Metody Ilościowe w Badaniach Ekonomicznych; 2011, 12, 1; 37-52
    2082-792X
    Pojawia się w:
    Metody Ilościowe w Badaniach Ekonomicznych
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simultaneous testing procedures of many null hypotheses and their applications in the DNA microarrays analysis
    Autorzy:
    Dudziński, Marcin
    Furmańczyk, Konrad
    Powiązania:
    https://bibliotekanauki.pl/articles/748330.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Matematyczne
    Tematy:
    Multiple hypothesis testing procedures, Familywise error rate, False discovery proportion, False discovery rate, p-values, q-values, DNA microarrays
    Opis:
    W naszej pracy rozważamy różne podejścia do problematyki jednoczesnego testowania wielu hipotez zerowych. W tym kontekście omawiamy procedury testowania typu single-step, step-down i step-up. W szczególności, przedstawiamy własności i zastosowania takich miar błędów testowania, jak: FWER, k-FWER, FDP, FDR, pFDR. Wspomniane procedury testowania są intensywnie wykorzystywane w analizie mikromacierzy DNA, która to analiza umożliwia monitorowanie poziomów ekspresji wielu genów jednocześnie oraz znajduje ostatnio szerokie zastosowania w diagnostyce, leczeniu i badaniach medycznych.
    In our paper, we consider different approaches to the problem of simultaneous testing of many null hypotheses. In this context, we discuss the single-step, the step-down and the step-up procedures of multiple testing. In particular, we are concerned with their properties and applications in the control of the error rates, such as:FW ER, k-FWER, FDP, FDR, pFDR. The mentioned procedures are intensively used in the DNA microarrays analysis, which enables the monitoring of expression levels of many genes simultaneously and is widely applied in recent medical diagnostics, treatment and research.
    Źródło:
    Mathematica Applicanda; 2007, 35, 49/08
    1730-2668
    2299-4009
    Pojawia się w:
    Mathematica Applicanda
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    SOME PROPOSAL OF THE TEST FOR A RANDOM WALK DETECTION AND ITS APPLICATION IN THE STOCK MARKET DATA ANALYSIS
    Autorzy:
    Dudziński, Marcin
    Furmańczyk, Konrad
    Orłowski, Arkadiusz
    Powiązania:
    https://bibliotekanauki.pl/articles/453162.pdf
    Data publikacji:
    2018
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
    Tematy:
    random walk
    arcsine law
    test for a random walk detection
    stock market data analysis
    Opis:
    According to the numerous groups of theoreticians and practitioners, who act in the area of financial markets, changes in the stock prices are random and it is almost infeasible to predict them correctly using historical data. This approach is based on the random walk theory, which states that the price of financial instrument in the subsequent time point is the sum of its price in the previous time point and some random variable with a finite variance, i.e. it is modeled with the use of a stochastic process called a random walk. The random walk hypothesis stands in contradiction to the beliefs of the ordinary technical analysis followers, where the prediction is carried out on the grounds of existing trends, and furthermore, this hypothesis regards such a modeling of financial markets as incorrect. In our work, we construct statistical test for a random walk detection, which is based on the first arcsine law. We also present simulation results that allow to check the quality of the proposed test, as well as we show the application of the introduced test in the stock exchange data analysis.
    Źródło:
    Metody Ilościowe w Badaniach Ekonomicznych; 2018, 19, 4; 339-346
    2082-792X
    Pojawia się w:
    Metody Ilościowe w Badaniach Ekonomicznych
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    BAYESIAN CONFIDENCE INTERVALS FOR THE NUMBER AND THE SIZE OF LOSSES IN THE OPTIMAL BONUS–MALUS SYSTEM
    Autorzy:
    Dudzinski, Marcin
    Furmanczyk, Konrad
    Kocinski, Marek
    Powiązania:
    https://bibliotekanauki.pl/articles/453541.pdf
    Data publikacji:
    2013
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
    Tematy:
    optimal BMS
    number of claims
    severity of claims
    Bayesian analysis
    Bayesian confidence intervals asymmetric loss functions
    Opis:
    Most of the so far proposed Bonus–Malus Systems (BMSs) establish a premium only according to the number of accidents, without paying attention to the vehicle damage severity. [Frangos and Vrontos 2001] proposed the optimal BMS design based not only on the number of accidents of a policyholder, but also on the size of loss of each accident. In our work, we apply the approach presented by Frangos and Vrontos to construct the Bayesian confidence intervals for both the number of accidents and the amount of damage caused by these accidents. We also conduct some simulations in order to create tables of estimates for both the numbers and the sizes of losses and to compute the realizations of the corresponding Bayesian confidence intervals. We compare the results obtained by using our simulation studies with the appropriate results derived through an application of an asymmetric loss function and its certain modification.93-104
    Źródło:
    Metody Ilościowe w Badaniach Ekonomicznych; 2013, 14, 1; 93-104
    2082-792X
    Pojawia się w:
    Metody Ilościowe w Badaniach Ekonomicznych
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determinanty zmian współzależności wybranych giełd papierów wartościowych. Analiza relacji GPW w Warszawie z giełdami na świecie
    Autorzy:
    Czapkiewicz, Anna
    Fiszeder, Piotr
    Furmańczyk, Konrad
    Powiązania:
    https://bibliotekanauki.pl/books/45377692.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
    Opis:
    W publikacji zaprezentowano modelowanie powiązań między indeksami wybranych giełd papierów wartościowych. Omawiane zagadnienia można zaklasyfikować do kilku wątków tematycznych. Pierwszy obejmuje pogrupowanie giełd na świecie pod względem ich podobieństwa w relacjach z innymi giełdami w celu wskazania miejsca Giełdy Papierów Wartościowych w Warszawie na tle innych giełd tego typu. Drugi ukazuje potencjalne determinanty zmian poziomu współzależności wybranych giełd. Natomiast trzeci wątek badań koncentruje się na teoretycznych własnościach zastosowanych narzędzi statystycznych. Zagadnienie dotyczące roli wskaźników finansowych oraz makroekonomicznych w dynamice struktury powiązań warszawskiej Giełdy Papierów Wartościowych z innymi giełdami na świecie było rzadko poruszane w literaturze przedmiotu, więc celem tej monografii jest próba częściowego wypełnienia tej luki.
    Dostawca treści:
    Biblioteka Nauki
    Książka
    Tytuł:
    The dynamics of pollen seasons of the most allergenic plants - 15-year observations in Warsaw
    Autorzy:
    Lipiec, Agnieszka
    Rapiejko, Piotr
    Furmańczyk, Konrad
    Jurkiewicz, Dariusz
    Powiązania:
    https://bibliotekanauki.pl/articles/1398282.pdf
    Data publikacji:
    2018
    Wydawca:
    Index Copernicus International
    Tematy:
    allergic rhinitis
    pollen monitoring
    pollen count
    Opis:
    Introduction: Allergic rhinitis concerns nearly 25% of the Polish population. Among pollen allergens, the most common reasons for allergic rhinitis are: grass, birch and mugwort. Knowledge of the characteristics of pollen seasons is necessary in diagnostics, monitoring of therapy and prevention of allergic rhinitis. Purpose: This work aims to analyze pollen seasons of the most allergenic plants in the Polish population; grass, birch and mugwort in the years 2003–2017 in Warsaw. Material and methods: Measurements of pollen concentration were carried out using Burkard volumetric spore trap operating in continuous mode. Analysis of pollen seasons was conducted based on the following characteristics: beginning, end, and length of season, the seasonal pollen index (SPI), defined as the sum of average daily pollen concentrations over the year, maximum daily concentration, number of days with maximum and threshold concentration. Linear regression together with the Pearson correlation coefficient were used in statistical analysis to study the relationship between variables; furthermore, descriptive characteristics of distributions studied were determined. Results: The average beginning of the birch pollen season in the analyzed period is April 10th, and it belongs to seasons of medium length (47 days on average). Birch pollen count above 75 grains/m3, when most allergic people develop symptoms, was recorded for an average of 18 days. The highest daily birch pollen count reaching 6321 grains/m3 (2012) exceeded the lowest value of the maximum concentration by almost 20 times (2015). Among the taxa analyzed, the highest values of daily counts and annual sums were recorded for birch pollen. The average date for the beginning of grass pollination season is on May 13th. It is the longest pollen season (on average 134 days), and the period when concentration exceeded 50 grains/m3 covered an average of 26 days. The highest daily grass pollen counts reaching
496 grains/m3 (2007) exceeded the lowest value of maximum concentration by 3.5 times (2016). The average date of the beginning of mugwort pollen season is July 16th. The season lasts 65 days on average, when concentration exceeding 30 grains /m3 was registered for an average of 12 days. The highest daily mugwort pollen count reaching 154 grains/m3 (2007) exceeded the lowest value of maximum concentration by 4 times (2013). For all analyzed taxa, the strongest correlated variables are the sum of average daily pollen concentrations over the year (SPI ) and daily maximum concentration (correlation for birch pollen = 0.92, for grass pollen = 0.88, and for mugwort pollen = 0.91). Conclusions: Periods of pollen in the air show certain variation in the analyzed 15-year period. The maximum concentration in the pollen season for the analyzed taxa and the the sum of average daily pollen concentrations over the year show the highest variability, particularly strongly expressed in the case of birch pollen. There is a linear relationship between the sum of average daily pollen concentrations over the year and the maximum concentration value as well as the number of days with the threshold concentration for all analyzed taxa. Variability of parameters describing the dynamics of pollen seasons indicates the need to monitor, both by patients with hay fever and physicians, the current information on the concentration of pollen in the air during the pollen season.
    Źródło:
    Polish Journal of Otolaryngology; 2018, 72, 6; 44-53
    0030-6657
    2300-8423
    Pojawia się w:
    Polish Journal of Otolaryngology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An application of branching processes in stochastic modeling of economic development
    Autorzy:
    Dudziński, Marcin
    Furmańczyk, Konrad
    Kociński, Marek
    Twardowska, Krystyna
    Powiązania:
    https://bibliotekanauki.pl/articles/452955.pdf
    Data publikacji:
    2010
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
    Tematy:
    branching processes
    moment generating function
    forecasting of financial
    positions of firms
    Opis:
    In our paper, a stochastic model of forecasting of the numer of firms of a given type, acting on the market in a given year, is proposed. The model uses the probabilistic tools of the theory of branching processes. Our approach is an alternative method to the forecasting methods proposed so far, including those based on time series. The theoretical results presented in the paper may be applied in the forecasting of the market position of the firms of a given sector.
    Źródło:
    Metody Ilościowe w Badaniach Ekonomicznych; 2010, 11, 1; 70-80
    2082-792X
    Pojawia się w:
    Metody Ilościowe w Badaniach Ekonomicznych
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of selected factors on peak nasal inspiratory flow readings – Epidemiology of Allergic Diseases in Poland study
    Autorzy:
    Krzych-Fałta, Edyta
    Furmańczyk, Konrad
    Piekarska, Barbara
    Sybilski, Adam
    Samoliński, Bolesław
    Powiązania:
    https://bibliotekanauki.pl/articles/1398470.pdf
    Data publikacji:
    2017
    Wydawca:
    Index Copernicus International
    Tematy:
    peak nasal inspiratory flow
    nasal patency
    parameters affecting peak nasal inspiratory flow
    Opis:
    The aim of this study was to investigate the effect of selected factors/parameters on peak nasal inspiratory flow (PNIF) in the Polish population as part of the Epidemiology of Allergic Diseases in Poland study. Material/methods: The popu¬lation of this study comprised of a group of children aged 6–7 years (n=1123), adolescents aged 13–14 years (n=1136), and adults (n=1876) – all residents of seven large Polish cities. Method – measurement of PNIF. The effect of selected param¬eters on PNIF was measured with translated and validated questionnaires developed for international studies ECRHS II (European Community Respiratory Health Survey II) and ISAAC (International Study of Asthma and Allergies in Child¬hood). Results: Indoor environmental factors including heating with coal, wood or gas significantly increase nasal con¬gestion. In the group of passive smokers, PNIF was lower than in the group of active smokers. PNIF rate decreased with the number of smokers per household. Conclusions: Peak nasal inspiratory flow values were significantly affected by such parameters as selected household environmental factors.
    Źródło:
    Polish Journal of Otolaryngology; 2017, 71, 1; 40-44
    0030-6657
    2300-8423
    Pojawia się w:
    Polish Journal of Otolaryngology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ wybranych czynników środowiskowych na maksymalny przepływ nosowy wdechowy – część projektu ECAP (Epidemiologia Chorób Alergicznych w Polsce)
    Autorzy:
    Krzych-Fałta, Edyta
    Furmańczyk, Konrad
    Piekarska, Barbara
    Sybilski, Adam
    Samoliński, Bolesław
    Powiązania:
    https://bibliotekanauki.pl/articles/1398475.pdf
    Data publikacji:
    2017
    Wydawca:
    Index Copernicus International
    Tematy:
    maksymalny przepływ nosowy wdechowy
    przepływ nosowy
    parametry modelujące maksymalny przepływ nosowy wdechowy
    Opis:
    Celem niniejszej pracy była próba określenia wpływu wybranych czynników/parametrów na wynik maksymalnego przepływu nosowego wdechowego (PNIF, ang. peak nasal inspiratory flow) w badanej populacji polskiej projektu Epidemiologia Chorób Alergicznych w Polsce (ECAP). Materiał/metody: Badaną populację stanowiła grupa dzieci w wieku 6–7 lat (n=1123), młodzieży w wieku 13–14 lat (n=1136) oraz dorosłych (n=1876) zamieszkałych w siedmiu dużych polskich miastach. W badaniu posłużono się pomiarem maksymalnego przepływu nosowego wdechowego (PNIF). Do oceny wpływu wybranych czynników na wartości PNIF wykorzystano przetłumaczone i walidowane kwestionariusze opracowane na potrzeby światowych badań ECRHS II (European Community Respiratory Health Survey II) i ISAAC (International Study of Asthma and Allergies in Childhood). Wyniki: Określone warunki wewnątrz gospodarstwa domowego, m.in. ogrzewanie węglem, drewnem lub piecem gazowym, istotnie zwiększają przekrwienie błony śluzowej nosa. W grupie biernych palaczy PNIF był niższy niż w grupie czynnych palaczy. Wskaźnik PNIF malał wraz ze wzrostem liczby domowników palących papierosy. Wnioski: Wybrane czynniki środowiska
    Źródło:
    Polish Journal of Otolaryngology; 2017, 71, 1; 40-44
    0030-6657
    2300-8423
    Pojawia się w:
    Polish Journal of Otolaryngology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of selected aspects of the hygiene hypothesis and their effect on the incidence of allergy
    Autorzy:
    Krzych-Fałta, Edyta
    Wojas, Oksana
    Furmańczyk, Konrad
    Dziewa-Dawidczyk, Diana
    Piekarska, Barbara
    Samoliński, Bolesław
    Sybilski, Adam
    Powiązania:
    https://bibliotekanauki.pl/articles/2203019.pdf
    Data publikacji:
    2023-03-02
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    asthma
    allergy
    allergic rhinitis
    hygiene hypothesis
    European Community Respiratory Health Survey II
    International Study of Asthma and Allergies in Childhood
    Opis:
    Objectives The development of allergic conditions is largely dependent on the interactions between genetic (individual genetic predisposition) and environmental factors (exposure to risk factors). The aim of this study was an attempt to assess the influence of selected elements of the hygiene theory in the development of allergic diseases such as allergic rhinitis and asthma. Material and Methods The study group consisted of 5518 women and 3868 men. The method that was used was the European Community Respiratory Health Survey II and International Study of Asthma and Allergies in Childhood questionnaire validated and adapted to Central and Eastern European conditions. The project was conducted in 8 urban areas (Gdańsk, Wrocław, Poznań, Katowice, Kraków, Lublin, Białystok, Warsaw) and 1 rural area (Krasnystaw county). This study had 2 stages; the first stage involved grouping the 22 500 respondents based on their questionnaire responses with the use of a Personal Digital Assistant (PDA); the second stage involved 7000 subjects, who underwent additional assessments: skin prick tests (birch, grasses/cereals, Dermatophagoides pteronyssinus and Dermatophagoides farinae, molds [set I: Botrytis cinerea, Cladosporium herbarum, Alternaria tenuis, Curvularia lunata, Fusarium moniliforme, Helminthosporium], molds [set II: Aspergillus fumigatus, Mucor mucedo, Penicillium notatum, Pullularia pullulans, Rhizopus nigricans, Serpula lacrymans], cat, dog, molds Cladosporium herbarum, Alternaria tenuis) and spirometry tests. Results The age at which children attend the nursery school is critical to the development of allergic diseases; in allergic rhinitis, the risk of an IgE-dependent reaction is 2 times higher in the second than in the first year of life (p = 0.00147, p < 0.05), while in asthma, having a large number of siblings increases the risk of developing obstructive disease by almost 6 times (p = 0.00316, p < 0.05).The age at which children attend the nursery school is critical to the development of allergic diseases; in allergic rhinitis, the risk of an IgE-dependent reaction is 2 times higher in the second than in the first year of life (p = 0.00147, p < 0.05), while in asthma, having a large number of siblings increases the risk of developing obstructive disease by almost 6 times (p = 0.00316, p < 0.05). Conclusions The hygiene theory is particularly applicable and can explain the relationship of selected habits in the development of allergic diseases. Int J Occup Med Environ Health. 2023;36(1):69–83
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2023, 36, 1; 69-83
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of selected aspects of the hygiene hypothesis and their effect on the incidence of allergy
    Autorzy:
    Krzych-Fałta, Edyta
    Wojas, Oksana
    Furmańczyk, Konrad
    Dziewa-Dawidczyk, Diana
    Piekarska, Barbara
    Samoliński, Bolesław
    Sybilski, Adam
    Powiązania:
    https://bibliotekanauki.pl/articles/2188907.pdf
    Data publikacji:
    2023
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    asthma
    allergy
    allergic rhinitis
    hygiene hypothesis
    European Community Respiratory Health Survey II
    International Study of Asthma and Allergies in Childhood
    Opis:
    Objectives The development of allergic conditions is largely dependent on the interactions between genetic (individual genetic predisposition) and environmental factors (exposure to risk factors). The aim of this study was an attempt to assess the influence of selected elements of the hygiene theory in the development of allergic diseases such as allergic rhinitis and asthma. Material and Methods The study group consisted of 5518 women and 3868 men. The method that was used was the European Community Respiratory Health Survey II and International Study of Asthma and Allergies in Childhood questionnaire validated and adapted to Central and Eastern European conditions. The project was conducted in 8 urban areas (Gdańsk, Wrocław, Poznań, Katowice, Kraków, Lublin, Białystok, Warsaw) and 1 rural area (Krasnystaw county). This study had 2 stages; the first stage involved grouping the 22 500 respondents based on their questionnaire responses with the use of a Personal Digital Assistant (PDA); the second stage involved 7000 subjects, who underwent additional assessments: skin prick tests (birch, grasses/cereals, Dermatophagoides pteronyssinus and Dermatophagoides farinae, molds [set I: Botrytis cinerea, Cladosporium herbarum, Alternaria tenuis, Curvularia lunata, Fusarium moniliforme, Helminthosporium], molds [set II: Aspergillus fumigatus, Mucor mucedo, Penicillium notatum, Pullularia pullulans, Rhizopus nigricans, Serpula lacrymans], cat, dog, molds Cladosporium herbarum, Alternaria tenuis) and spirometry tests. Results The age at which children attend the nursery school is critical to the development of allergic diseases; in allergic rhinitis, the risk of an IgE-dependent reaction is 2 times higher in the second than in the first year of life (p = 0.00147, p < 0.05), while in asthma, having a large number of siblings increases the risk of developing obstructive disease by almost 6 times (p = 0.00316, p < 0.05).The age at which children attend the nursery school is critical to the development of allergic diseases; in allergic rhinitis, the risk of an IgE-dependent reaction is 2 times higher in the second than in the first year of life (p = 0.00147, p < 0.05), while in asthma, having a large number of siblings increases the risk of developing obstructive disease by almost 6 times (p = 0.00316, p < 0.05). Conclusions The hygiene theory is particularly applicable and can explain the relationship of selected habits in the development of allergic diseases.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2023, 36, 1; 69-83
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nasal patency in Poles in the light of research as part of the project on Epidemiology of Allergic Diseases in Poland
    Autorzy:
    Krzych-Fałta, Edyta
    Furmanczyk, Konrad
    Samolinski, Bolesław
    Piekarska, Barbara
    Samel-Kowalik, Piotr
    Lipiec, Agnieszka
    Raciborski, Filip
    Sybilski, Adam
    Powiązania:
    https://bibliotekanauki.pl/articles/989279.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    peak nasal inspiratory flow
    nasal patency
    Opis:
    Objective. The aim of this study was to estimate the reference values for nasal inspiratory flow in the study population in Poland as part of the project on Epidemiology of Allergic Diseases in Poland (ECAP). Materials and method. The study subjects were a group of 4,137 people: 1,136 children aged 6–7 years (561 girls and 575 boys), 1,123 adolescents aged 13–14 years (546 girls, 577 boys) and 1,878 adults (1,145 women, 733 men), residing in seven large Polish cities. The method used in the study was the measurement of the peak nasal inspiratory flow (PNIF) using a special mask for rhinomanometry tests, with a measurement scale of 20–350 L/min. Measurements were conducted twice: once before and once after nasal mucosa vasoconstriction with a 0.1% xylometazoline (Xylometazolinum) solution. Results. Nasal patency rates increased with age in healthy subjects (children aged 6–7 years: 75.95 L/min; teenagers aged 13–14 years: 91.44 L/min and adults: 97.13 L/min (P<0.05). Similarly significant correlations were observed in the study group based on the region of residence (P<0.05). A moderate correlation was observed between PNIF and height as well as weight (with correlation coefficients r=0.51, P<0.05; and r=0.49, P<0.05, respectively). Interestingly, the observed difference in nasal vasoconstriction varied considerably between study subgroups with respect to the pre-determined criteria of age, gender, place of residence, and clinical diagnosis (allergic rhinitis vs. healthy controls), with the mean rates of 25–28%. Conclusions. Any attempt to determine reference values for a given study population should include a number of variables, such as age, height, body weight, which can noticeably affect study results.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2016, 23, 3
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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