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Janitza S, Majumder M, Mendolia F, Jeske S, Kulmann H. Response to the Letter to the Editor by Koneswarakantha and Ménard. Ther Innov Regul Sci 2022; 56:379-380. [PMID: 35275362 DOI: 10.1007/s43441-022-00391-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Accepted: 03/03/2022] [Indexed: 10/18/2022]
Affiliation(s)
| | | | - Franco Mendolia
- Bayer AG, Research & Development, Pharmaceuticals, Statistics and Data Insights, 42113, Wuppertal, Germany.
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Fritsch A, Schlömer P, Mendolia F, Mütze T, Jahn-Eimermacher A. Efficiency Comparison of Analysis Methods for Recurrent Event and Time-to-First Event Endpoints in the Presence of Terminal Events—Application to Clinical Trials in Chronic Heart Failure. Stat Biopharm Res 2021. [DOI: 10.1080/19466315.2021.1945488] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
| | | | | | | | - Antje Jahn-Eimermacher
- Department of Mathematics and Natural Sciences, Darmstadt University of Applied Sciences, Darmstadt, Germany
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Janitza S, Majumder M, Mendolia F, Jeske S, Kulmann H. Correction to: elaborator: A Novel App for Insights into Laboratory Data of Clinical Trials. Ther Innov Regul Sci 2021; 55:1230. [PMID: 34296419 DOI: 10.1007/s43441-021-00326-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Silke Janitza
- Research & Development, Pharmaceuticals, Statistics and Data Insights, Bayer AG, 13342, Berlin, Germany.
| | | | | | | | - Hermann Kulmann
- Research & Development, Pharmaceuticals, Statistics and Data Insights, Bayer AG, 13342, Berlin, Germany
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Hennecke E, Elmenhorst D, Mendolia F, Putzke M, Bauer A, Aeschbach D, Elmenhorst EM. Reestablishment of individual sleep structure during a single 14-h recovery sleep episode after 58 h of wakefulness. J Sleep Res 2017; 28:e12641. [PMID: 29171170 DOI: 10.1111/jsr.12641] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Accepted: 10/24/2017] [Indexed: 11/28/2022]
Abstract
Sleep structure is highly stable within individuals but different between individuals. The present study investigated robustness of the individual sleep structure to extended total sleep deprivation. Seventeen healthy men spent a baseline night (23:00-07:00 hours), 58 h of sleep deprivation and a 14-h recovery night (17:00-07:00 hours) in the laboratory. Intraclass correlation coefficients showed that the agreement between baseline and recovery with respect to the proportion of the different sleep stages increased as a function of recovery sleep duration. High values were reached for most of the sleep stages at the end of 14 h of recovery sleep (intraclass correlation coefficients between 0.38 and 0.76). If sleep duration of the recovery night is extended to 14 h, sleep stage distribution resembles that of a baseline night underlining the robustness of the individual sleep structure.
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Affiliation(s)
- Eva Hennecke
- Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany
| | - David Elmenhorst
- Institute of Neuroscience and Medicine (INM-2), Forschungszentrum Jülich, Jülich, Germany.,Department of Psychiatry and Psychotherapy, Rheinische Friedrich-Wilhelms-University Bonn, Bonn, Germany
| | - Franco Mendolia
- Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany
| | - Matthias Putzke
- Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany
| | - Andreas Bauer
- Institute of Neuroscience and Medicine (INM-2), Forschungszentrum Jülich, Jülich, Germany.,Neurological Department, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - Daniel Aeschbach
- Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany.,Division of Sleep and Circadian Disorders, Brigham and Women's Hospital, Boston, MA, USA.,Division of Sleep Medicine, Harvard Medical School, Boston, MA, USA
| | - Eva-Maria Elmenhorst
- Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany.,Institute for Occupational and Social Medicine, Medical Faculty, RWTH Aachen University, Aachen, Germany
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Abstract
PURPOSE The German Aerospace Center (DLR) investigated in the NORAH sleep study the association between a distinct change in nocturnal aircraft noise exposure due to the introduction of a night curfew (11:00 p.m.-5:00 a.m.) at Frankfurt Airport and short-term annoyance reactions of residents in the surrounding community. Exposure-response curves were calculated by random effects logistic regression to evaluate the aircraft noise-related parameters (1) number of overflights and (2) energy equivalent noise level LASeq for the prediction of short-term annoyance. Data of the NORAH sleep study were compared with the STRAIN sleep study which was conducted by DLR near Cologne-Bonn Airport in 2001/2002 (N = 64), representing a steady-state/low-rate change. METHODS The NORAH sleep study was based on questionnaire surveys with 187 residents living in the vicinity of Frankfurt Airport. Noise-induced short-term annoyance and related non-acoustical variables were assessed. Nocturnal aircraft noise exposure was measured inside the residents' home. RESULTS A statistically significant rise in the portion of annoyed residents with increasing number of overflights was found. Similarly, the portion of annoyed subjects increased with rising LASeq. Importance of the frequency of fly-overs for the prediction of annoyance reactions was emphasized. The annoyance probability was significantly higher in the NORAH than in the STRAIN sleep study. CONCLUSIONS Results confirm the importance of both acoustical parameters for the prediction of short-term annoyance due to nocturnal aircraft noise. Quantitative annoyance models that were derived at steady-state/low-rate change airports cannot be directly applied to airports that underwent a distinct change in operational and noise exposure patterns.
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Affiliation(s)
- Julia Quehl
- Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, North Rhine Westphalia, Germany.
| | - Uwe Müller
- Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, North Rhine Westphalia, Germany
| | - Franco Mendolia
- Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, North Rhine Westphalia, Germany
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Schäffer B, Pieren R, Mendolia F, Basner M, Brink M. Noise exposure-response relationships established from repeated binary observations: Modeling approaches and applications. J Acoust Soc Am 2017; 141:3175. [PMID: 28599544 DOI: 10.1121/1.4982922] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Noise exposure-response relationships are used to estimate the effects of noise on individuals or a population. Such relationships may be derived from independent or repeated binary observations, and modeled by different statistical methods. Depending on the method by which they were established, their application in population risk assessment or estimation of individual responses may yield different results, i.e., predict "weaker" or "stronger" effects. As far as the present body of literature on noise effect studies is concerned, however, the underlying statistical methodology to establish exposure-response relationships has not always been paid sufficient attention. This paper gives an overview on two statistical approaches (subject-specific and population-averaged logistic regression analysis) to establish noise exposure-response relationships from repeated binary observations, and their appropriate applications. The considerations are illustrated with data from three noise effect studies, estimating also the magnitude of differences in results when applying exposure-response relationships derived from the two statistical approaches. Depending on the underlying data set and the probability range of the binary variable it covers, the two approaches yield similar to very different results. The adequate choice of a specific statistical approach and its application in subsequent studies, both depending on the research question, are therefore crucial.
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Affiliation(s)
- Beat Schäffer
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Acoustics/Noise Control, Überlandstrasse 129, 8600 Dübendorf, Switzerland
| | - Reto Pieren
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Acoustics/Noise Control, Überlandstrasse 129, 8600 Dübendorf, Switzerland
| | - Franco Mendolia
- German Aerospace Center (DLR), Institute of Aerospace Medicine, 51147 Cologne, Germany
| | - Mathias Basner
- Department of Psychiatry, Unit for Experimental Psychiatry, Division of Sleep and Chronobiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6021, USA
| | - Mark Brink
- Federal Office for the Environment, Noise and NIR Division, 3003 Bern, Switzerland
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Aeschbach D, Vejvoda M, Mendolia F, Tritschler K. 0156 ADDITIVE EFFECTS OF THE NUMBER OF COMPLETED FLIGHTS AND TIME AWAKE ON FATIGUE IN SHORT-HAUL AIRLINE PILOTS. Sleep 2017. [DOI: 10.1093/sleepj/zsx050.155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Sanok S, Mendolia F, Wittkowski M, Rooney D, Putzke M, Aeschbach D. Passenger comfort on high-speed trains: effect of tunnel noise on the subjective assessment of pressure variations. Ergonomics 2015; 58:1022-1031. [PMID: 25597694 DOI: 10.1080/00140139.2014.997805] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Accepted: 12/02/2014] [Indexed: 06/04/2023]
Abstract
When passing through a tunnel, aerodynamic effects on high-speed trains may impair passenger comfort. These variations in atmospheric pressure are accompanied by transient increases in sound pressure level. To date, it is unclear whether the latter influences the perceived discomfort associated with the variations in atmospheric pressure. In a pressure chamber of the DLR-Institute of Aerospace Medicine, 71 participants (M = 28.3 years ± 8.1 SD) rated randomised pressure changes during two conditions according to a crossover design. The pressure changes were presented together with tunnel noise such that the sound pressure level was transiently elevated by either +6 dB (low noise condition) or +12 dB (high noise condition) above background noise level (65 dB(A)). Data were combined with those of a recent study, in which identical pressure changes were presented without tunnel noise (Schwanitz et al., 2013, 'Pressure Variations on a Train - Where is the Threshold to Railway Passenger Discomfort?' Applied Ergonomics 44 (2): 200-209). Exposure-response relationships for the combined data set comprising all three noise conditions show that pressure discomfort increases with the magnitude and speed of the pressure changes but decreases with increasing tunnel noise. Practitioner Summary: In a pressure chamber, we systematically examined how pressure discomfort, as it may be experienced by railway passengers, is affected by the presence of tunnel noise during pressure changes. It is shown that across three conditions (no noise, low noise (+6 dB), high noise (+12 dB)) pressure discomfort decreases with increasing tunnel noise.
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Affiliation(s)
- Sandra Sanok
- a German Aerospace Center (DLR), Institute of Aerospace Medicine, Division of Flight Physiology , Cologne , Germany
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Ahn KW, Mendolia F. Pseudo-value approach for comparing survival medians for dependent data. Stat Med 2013; 33:1531-8. [PMID: 24338956 DOI: 10.1002/sim.6072] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Revised: 09/24/2013] [Accepted: 11/22/2013] [Indexed: 11/07/2022]
Abstract
Survival median is commonly used to compare treatment groups in cancer-related research. The current literature focuses on developing tests for independent survival data. However, researchers often encounter dependent survival data such as matched pair data or clustered data. We propose a pseudo-value approach to test the equality of survival medians for both independent and dependent survival data. We investigate the type I error and power of the proposed method by a simulation study, in which we examine independent and dependent data. The simulation study shows that the proposed method performs equivalently to the existing methods for independent survival data and performs better for dependent survival data. A study comparing survival median times for bone marrow transplants illustrates the proposed method.
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Affiliation(s)
- Kwang Woo Ahn
- Division of Biostatistics, Medical College of Wisconsin, 8701 Watertown Plank RoadMilwaukee, WI, 53226, U.S.A
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Mendolia F, Klein JP, Petersdorf EW, Malkki M, Wang T. Comparison of statistics in association tests of genetic markers for survival outcomes. Stat Med 2013; 33:828-44. [PMID: 24105914 DOI: 10.1002/sim.5982] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2013] [Accepted: 08/21/2013] [Indexed: 11/07/2022]
Abstract
Computationally efficient statistical tests are needed in association testing of large scale genetic markers for survival outcomes. In this study, we explore several test statistics based on the Cox proportional hazards model for survival data. First, we consider the classical partial likelihood-based Wald and score tests. A revised way to compute the score statistics is explored to improve the computational efficiency. Next, we propose a Cox-Snell residual-based score test, which allows us to handle the controlling variables more conveniently. We also illustrated the incorporation of these three tests into a permutation procedure to adjust for the multiple testing. In addition, we examine a simulation-based approach proposed by Lin (2005) to adjust for multiple testing. We presented the comparison of these four statistics in terms of type I error, power, family-wise error rate, and computational efficiency under various scenarios via extensive simulation.
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Affiliation(s)
- Franco Mendolia
- Division of Biostatistics, Institute for Health and Society, Medical College of Wisconsin, Milwaukee, WI, 53226, U.S.A
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Espro C, Mendolia F, Marini S, Frusteri F, Parmaliana A. Innovative membrane based process for the selective oxidation of light alkanes assisted by the Fenton system. ASIA-PAC J CHEM ENG 2010. [DOI: 10.1002/apj.390] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Espro C, Marini S, Mendolia F, Frusteri F, Parmaliana A. Enhancing effect of S and F moieties on the performance of Fenton system in the selective oxidation of propane. Catal Today 2009. [DOI: 10.1016/j.cattod.2008.07.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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