20 results on '"Helbach J"'
Search Results
2. Decision Coaching und Adhärenzunterstützung zur Prävention von Schlaganfallrezidiven (StrokeCompass) - ein Mixed-Methods Projekt
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Jarchow, AM, Wilfling, D, Peper, J, Helbach, J, Bourry, R, Schulz, LM, Wandscher, K, Lange, C, Wagner, M, Alegiani, A, Fix, JM, Hoffmann, F, Heesen, C, Thomalla, G, Rahn, AC, Jarchow, AM, Wilfling, D, Peper, J, Helbach, J, Bourry, R, Schulz, LM, Wandscher, K, Lange, C, Wagner, M, Alegiani, A, Fix, JM, Hoffmann, F, Heesen, C, Thomalla, G, and Rahn, AC
- Published
- 2024
3. Wirksamkeit von Motivational Interviewing auf die medikamentöse Adhärenz zur Rezidivprophylaxe eines erneuten Schlaganfalls oder einer transitorischen ischämischen Attacke: Systematische Übersichtsarbeit von randomisierten kontrollierten Studien
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Wandscher, K, Hoffmann, F, Heesen, C, Thomalla, G, Rahn, AC, Helbach, J, Wandscher, K, Hoffmann, F, Heesen, C, Thomalla, G, Rahn, AC, and Helbach, J
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- 2024
4. Prävalenz von Harnblasendauerkathetern bei Pflegebedürftigen in stationären Pflegeeinrichtungen: Eine systematische Übersichtsarbeit
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Czwikla, J, Wandscher, K, Helbach, J, Fassmer, AM, Schmiemann, G, Hoffmann, F, Czwikla, J, Wandscher, K, Helbach, J, Fassmer, AM, Schmiemann, G, and Hoffmann, F
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- 2023
5. StrokeCompass-Decision-Coaching und Adhärenzunterstützung zur sekundären Schlaganfallprävention - ein Mixed-Methods-Projekt
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Bartmann, N, Helbach, J, Bourry, R, Thomalla, G, Fix, JM, Hoffmann, F, Heesen, C, Rahn, AC, Bartmann, N, Helbach, J, Bourry, R, Thomalla, G, Fix, JM, Hoffmann, F, Heesen, C, and Rahn, AC
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- 2023
6. Reporting nach Prisma-A in systematischen Reviews in Abhängigkeit zur Länge des Abstracts
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Helbach, J, Hoffmann, F, Pieper, D, Allers, K, Helbach, J, Hoffmann, F, Pieper, D, and Allers, K
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- 2023
7. Nearly 80 systematic reviews were published each day: observational study on trends in epidemiology and reporting over the years 2000-2019
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Allers, K, Hoffmann, F, Rombey, T, Helbach, J, Hoffmann, A, Mathes, T, Pieper, D, Allers, K, Hoffmann, F, Rombey, T, Helbach, J, Hoffmann, A, Mathes, T, and Pieper, D
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- 2022
8. Biodiversity response to forest management intensity, carbon stocks and net primary production in temperate montane forests
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Asbeck, Thomas, Sabatini, Francesco, Augustynczik, Andrey L. D., Basile, Marco, Helbach, Jan, Jonker, Marlotte, Knuff, Anna, Bauhus, Jürgen, Asbeck T., Sabatini F., Augustynczik A.L.D., Basile M., Helbach J., Jonker M., Knuff A., and Bauhus J.
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Insecta ,Animal ,Ecosystem ecology ,Science ,Forestry ,Plant ,Biodiversity ,Plants ,Forests ,Article ,Carbon ,Birds ,Bird ,Animals ,Medicine - Abstract
Managed forests are a key component of strategies aimed at tackling the climate and biodiversity crises. Tapping this potential requires a better understanding of the complex, simultaneous effects of forest management on biodiversity, carbon stocks and productivity. Here, we used data of 135 one-hectare plots from southwestern Germany to disentangle the relative influence of gradients of management intensity, carbon stocks and forest productivity on different components of forest biodiversity (birds, bats, insects, plants) and tree-related microhabitats. We tested whether the composition of taxonomic groups varies gradually or abruptly along these gradients. The richness of taxonomic groups was rather insensitive to management intensity, carbon stocks and forest productivity. Despite the low explanatory power of the main predictor variables, forest management had the greatest relative influence on richness of insects and tree-related microhabitats, while carbon stocks influenced richness of bats, birds, vascular plants and pooled taxa. Species composition changed relatively abruptly along the management intensity gradient, while changes along carbon and productivity gradients were more gradual. We conclude that moderate increases in forest management intensity and carbon stocks, within the range of variation observed in our study system, might be compatible with biodiversity and climate mitigation objectives in managed forests.
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- 2021
9. Information needs of people who have suffered a stroke or TIA and their preferred approaches of receiving health information: A scoping review.
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Helbach J, Hoffmann F, Hecht N, Heesen C, Thomalla G, Wilfling D, and Rahn AC
- Abstract
Purpose: We aimed to synthesize the information needs of people with stroke (PwS) in recurrent stroke prevention., Methods: In this scoping review we searched Medline (via PubMed), CINAHL, and PsycINFO from inception to June 5, 2023, to identify all studies describing the information needs of people 18 years and older who have suffered a stroke or transient ischemic attack within the past 5 years. We included qualitative and quantitative studies from developed countries published in German or English. Data analysis was performed following Arksey and O'Malley's methodological framework for scoping reviews., Findings: We screened 5822 records for eligibility and included 36 articles published between 1993 and 2023. None of the included studies used a comprehensive framework or defined information needs. Based on statements from PwS and their caregivers, PwS needed information on treatment, etiology, effects of stroke, prognosis, rehabilitation, discharge, life changes, care role, support options, information sources, and hospital procedures. The most frequently expressed needs were information on the treatment (77.8%) and stroke etiology (63.9%). The primary information source was healthcare professionals (85.7%), followed by written information (71.4%), family and friends (42.6%), and the internet (35.7%), with information provided directly by healthcare professionals being preferred. The timing of information transfer is often described as too early., Conclusion: PwS are primarily interested in clinical information about stroke, for example, treatment and etiology, and less often in information about daily life, for example, rehabilitation, the role of care, or lifestyle changes. PwS prefer to receive information directly from healthcare professionals. Developing a shared understanding of PwS's information needs is crucial to implement suitable strategies and programs for dealing with these needs in clinical practice., Competing Interests: Declaration of conflicting interestsThe author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
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- 2024
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10. Effectiveness of motivational interviewing on medication adherence for the prevention of recurrent stroke or transient ischemic attack: Systematic review of randomized controlled trials.
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Wandscher K, Hoffmann F, Heesen C, Thomalla G, Rahn AC, and Helbach J
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- Humans, Recurrence, Ischemic Attack, Transient prevention & control, Ischemic Attack, Transient drug therapy, Motivational Interviewing methods, Randomized Controlled Trials as Topic methods, Medication Adherence, Stroke prevention & control, Stroke drug therapy, Secondary Prevention methods
- Abstract
Background and Purpose: This systematic review examines the effectiveness of motivational interviewing (MI) on medication adherence for preventing recurrent stroke and transient ischemic attack (TIA)., Methods: MEDLINE (via PubMed), CINAHL, PsycINFO, CENTRAL, and ClinicalTrials.gov were searched from inception to 12 June 2023. Randomized controlled trials comparing MI with usual care or interventions without MI in participants with any stroke type were identified and summarized descriptively. Primary outcome was medication adherence. Secondary outcomes were quality of life (QoL) and different clinical outcomes. We assessed risk of bias with RoB 2 (revised Cochrane risk-of-bias tool) and intervention complexity with the iCAT_SR (intervention Complexity Assessment Tool for Systematic Reviews)., Results: We screened 691 records for eligibility and included four studies published in five articles. The studies included a total of 2751 participants, and three were multicentric. Three studies had a high risk of bias, and interventions varied in complexity. Two studies found significantly improved medication adherence, one at 9 (96.9% vs. 88.2%, risk ratio = 1.098, 95% confidence interval = 1.03-1.17) and one at 12 months (97.0% vs. 95.0%, p = 0.026), but not at other time points, whereas two other studies reported no significant changes. No significant differences were found in QoL or clinical outcomes., Conclusions: Evidence on MI appears inconclusive for improving medication adherence for recurrent stroke and TIA prevention, with no benefits on QoL and clinical outcomes. There is a need for robustly designed studies and process evaluations of MI as a complex intervention for people with stroke., Registration: PROSPERO (CRD42023433284)., (© 2024 The Authors. European Journal of Neurology published by John Wiley & Sons Ltd on behalf of European Academy of Neurology.)
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- 2024
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11. Prevalence of indwelling urinary catheters in nursing home residents: Systematic review.
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Czwikla J, Wandscher K, Helbach J, Fassmer AM, Schmiemann G, and Hoffmann F
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- Male, Humans, Female, United States, Urinary Catheters adverse effects, Urinary Catheterization adverse effects, Prevalence, Cross-Sectional Studies, Nursing Homes, Catheters, Indwelling adverse effects, Urinary Tract Infections epidemiology, Urinary Tract Infections etiology
- Abstract
Background: This systematic review examines the prevalence of indwelling urinary catheters in nursing home residents., Methods: MEDLINE via PubMed, CINAHL, and EMBASE were searched from inception to 9 August 2022. Cross-sectional studies and longitudinal studies with cross-sectional analyses reporting catheter prevalence in nursing home residents were identified and summarized descriptively. Study quality was assessed using the Joanna Briggs Institute's tool., Results: Sixty-seven studies (92.5 % cross-sectional) were included. The reported number of included residents ranged from 73 to 110,656. The median catheter prevalence was 7.3 % (interquartile range 4.3-10.1 %; n = 65 studies). It was higher in Germany (10.2 % [9.7-12.8 %]; n = 15) than in the United States of America (9.3 % [6.3-11.9 %]; n = 9), United Kingdom (6.9 % [4.8-8.5 %]; n = 7), and Sweden (7.3 % [6.4-7.9 %]; n = 6). Furthermore, it was higher among men (17.0 % [16.0-26.0 %]) than among women (5.3 % [4.0-9.5 %]) (n = 9). Only one study investigated differences by age. The prevalence was higher for transurethral (5.7 % [5.6-7.2 %]; n = 12) than for suprapubic (1.2 % [0.6-2.5 %]; n = 13) catheters. Most catheterized residents were long-term catheterized (n = 6) and had their catheter changed within 3 months (n = 2). Symptomatic urinary tract infections were more common among catheterized than among non-catheterized residents (n = 4)., Discussion: Catheter prevalence in nursing home residents varies between studies and countries. Prevalence differences by sex, age, and catheter type as well as duration of catheterization, catheter change intervals, and catheter-associated urinary tract infections are rarely reported because most studies do not primarily focus on catheters. Future studies should focus on the circumstances of urinary catheter use and care in nursing home residents., Registration and Funding: PROSPERO (29 August 2022; CRD42022354358); no funding., Competing Interests: Declaration of Competing Interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Two of the authors (Guido Schmiemann and Falk Hoffmann) were also authors of one study that was included in this review. Apart from this, there are no conflicts of interest., (Copyright © 2023 Elsevier Ltd. All rights reserved.)
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- 2023
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12. Cochrane review abstracts are getting longer, but this has no large impact on the reporting quality.
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Helbach J, Wandscher K, Pieper D, and Hoffmann F
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- Research Design, Review Literature as Topic
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Objective: To evaluate the reporting of abstracts of Cochrane Reviews according to PRISMA-A and to investigate a possible association with the abstract´s length., Methods: This is a retrospective, observational study based on all Cochrane Reviews indexed in Medline (via PubMed) until November 18, 2022. In the second part, a random sample of 440 abstracts was drawn, in which PRISMA-A adherence was assessed by two independent reviewers. Analyses were stratified by the year of publication and the number of words., Results: Overall, the median number of words of the 15,188 included abstracts was 469 (IQR 389-686 words), steadily increasing from 353 words in 2000 to 838 words in 2022, with less than one percent of the abstracts in 2022 having ≤ 300 words (in 2000: 30.7%). Analyses on PRISMA-A adherence in the random sample showed a mean score of 6.1 out of 12 fully reported items. Stratified by year, PRISMA-A adherence increased, with higher word counts in 2000-2010 and 2011-2015, while there was no difference in PRISMA-A adherence by abstract length in 2016-2022., Conclusion: Over the years, abstracts of Cochrane Reviews have become longer, running up to 1000 words. This conflicts with the Cochrane Handbook, which recommends a maximum length of 400 until it was aligned with MECIR in 2019, which has recommended a length of <700 words since 2012 but allows up to 1000 words. It is debatable whether such long abstracts meet the key goals of abstracts of being informative, accurate, appealing, and concise., (© 2023 The Authors. Journal of Evidence-Based Medicine published by Chinese Cochrane Center, West China Hospital of Sichuan University and John Wiley & Sons Australia, Ltd.)
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- 2023
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13. Hospitalization of German and Dutch Nursing Home Residents Depend on Different Long-Term Care Structures: A Systematic Review on Periods of Increased Vulnerability.
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Fassmer AM, Allers K, Helbach J, Zuidema S, Freitag M, Zieschang T, and Hoffmann F
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- Humans, Male, Hospitalization, Ethnicity, Germany, Long-Term Care, Nursing Homes
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Objective: To investigate proportions of hospitalized nursing home residents during periods of increased vulnerability, ie, the first 6 months after institutionalization and the last 6 months before death, and comparing the figures between Germany and the Netherlands., Design: Systematic review, registered in PROSPERO (CRD42022312506)., Setting and Participants: Newly admitted or deceased residents., Methods: We searched MEDLINE via PubMed, EMBASE, and CINAHL from inception through May 3, 2022. We included all observational studies that reported the proportions of all-cause hospitalizations among German or Dutch nursing home residents during these defined vulnerable periods. Study quality was assessed using the Joanna Briggs Institute's tool. We assessed study and resident characteristics and outcome information and descriptively reported them separately for both countries., Results: We screened 1856 records for eligibility and included 9 studies published in 14 articles (Germany: 8; Netherlands: 6). One study for each country investigated the first 6 months after institutionalization. A total of 10.2% of the Dutch and 42.0% of the German nursing home residents were hospitalized during this time. Overall, 7 studies reported on in-hospital deaths, with proportions ranging from 28.9% to 29.5% for Germany and from 1.0% to 16.3% for the Netherlands. Proportions for hospitalization in the last 30 days of life ranged from 8.0% to 15.7% (Netherlands: n = 2) and from 48.6% to 58.0% (Germany: n = 3). Only German studies assessed the differences by age and sex. Although hospitalizations were less common at older ages, they were more frequent in male residents., Conclusions and Implications: During the observed periods, the proportion of nursing homes residents being hospitalized differed greatly between Germany and the Netherlands. The higher figures for Germany can probably be explained by differences in the long-term care systems. There is a lack of research, especially for the first months after institutionalization, and future studies should examine the care processes of nursing home residents following acute events in more detail., (Copyright © 2023 AMDA – The Society for Post-Acute and Long-Term Care Medicine. Published by Elsevier Inc. All rights reserved.)
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- 2023
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14. Reporting according to the preferred reporting items for systematic reviews and meta-analyses for abstracts (PRISMA-A) depends on abstract length.
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Helbach J, Hoffmann F, Pieper D, and Allers K
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- Humans, Checklist, Research Design
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Objective: To evaluate reporting of abstracts of systematic reviews according to the preferred reporting items for systematic reviews and meta-analyses for abstracts (PRISMA-A) 2013 checklist., Study Design and Setting: A random sample of 534 systematic reviews on effectiveness indexed in PubMed between 2000 and 2019 was assessed. Adherence of abstracts to PRISMA-A was analysed using descriptive statistics. Results were stratified by number of words, structure, and year of publication., Result: The mean score of fully reported PRISMA-A items was 5.4 of 12, with adherence varying widely between items (0% to 98.8%). Cochrane reviews received higher mean total scores than non-Cochrane reviews (6.3 vs. 5.2). Adherence to PRISMA-A increased linearly with increasing word count. In non-Cochrane reviews, authors of structured abstracts more often adhered to PRISMA-A than those of unstructured abstracts. No improvements in reporting of abstracts were found after the implementation of PRISMA-A in 2013., Conclusion: Adherence to PRISMA-A shows great potential for improvement. Therefore, authors, editors, and reviewers should be made aware of PRISMA-A by referring to it in the journal submission guidelines. As adherence to PRISMA-A increases with the number of words, journals should consider to increase the word limit to 250-300 words., (Copyright © 2022 Elsevier Inc. All rights reserved.)
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- 2023
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15. Restrictions and their reporting in systematic reviews of effectiveness: an observational study.
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Helbach J, Pieper D, Mathes T, Rombey T, Zeeb H, Allers K, and Hoffmann F
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- Bias, Humans, PubMed, Systematic Reviews as Topic, Research Design, Research Report
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Background: Restrictions in systematic reviews (SRs) can lead to bias and may affect conclusions. Therefore, it is important to report whether and which restrictions were used. This study aims to examine the use of restrictions regarding language, publication period, and study type, as well as the transparency of reporting in SRs of effectiveness., Methods: A retrospective observational study was conducted with a random sample of 535 SRs of effectiveness indexed in PubMed between 2000 and 2019. The use of restrictions and their reporting were analysed using descriptive statistics., Results: Of the total 535 SRs included, four out of every ten (41.3%) lacked information on at least one of the three restrictions considered (language, publication period, or study type). Overall, 14.6% of SRs did not provide information on restrictions regarding publication period, 19.1% regarding study type, and 18.3% regarding language. Of all included SRs, language was restricted in 46.4%, and in more than half of the SRs with restricted language (130/248), it was unclear whether the restriction was applied during either the search or the screening process, or both. The restrictions were justified for publication period in 22.2% of the respective SRs (33/149), study type in 6.5% (28/433), and language in 3.2% (8/248). Differences in reporting were found between countries as well as between Cochrane and non-Cochrane reviews., Conclusions: This study suggests that there is a lack of transparency in reporting on restrictions in SRs. Authors as well as editors and reviewers should be encouraged to improve the reporting and justification of restrictions to increase the transparency of SRs., (© 2022. The Author(s).)
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- 2022
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16. Light heterogeneity affects understory plant species richness in temperate forests supporting the heterogeneity-diversity hypothesis.
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Helbach J, Frey J, Messier C, Mörsdorf M, and Scherer-Lorenzen M
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One of the most important drivers for the coexistence of plant species is the resource heterogeneity of a certain environment, and several studies in different ecosystems have supported this resource heterogeneity-diversity hypothesis. However, to date, only a few studies have measured heterogeneity of light and soil resources below forest canopies to investigate their influence on understory plant species richness. Here, we aim to determine (1) the influence of forest stand structural complexity on the heterogeneity of light and soil resources below the forest canopy and (2) whether heterogeneity of resources increases understory plant species richness. Measures of stand structural complexity were obtained through inventories and remote sensing techniques in 135 1-ha study plots of temperate forests, established along a gradient of forest structural complexity. We measured light intensity and soil chemical properties on six 25 m² subplots on each of these 135 plots and surveyed understory vegetation. We calculated the coefficient of variation of light and soil parameters to obtain measures of resource heterogeneity and determined understory plant species richness at plot level. Spatial heterogeneity of light and of soil pH increased with higher stand structural complexity, although heterogeneity of soil pH did not increase in conditions of generally high levels of light availability. Increasing light heterogeneity was also associated with increasing understory plant species richness. However, light heterogeneity had no such effects in conditions where soil resource heterogeneity (variation in soil C:N ratios) was low. Our results support the resource heterogeneity-diversity hypothesis for temperate forest understory at the stand scale. Our results also highlight the importance of interaction effects between the heterogeneity of both light and soil resources in determining plant species richness., Competing Interests: The authors declare no conflict of interest., (© 2022 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd.)
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- 2022
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17. Nearly 80 systematic reviews were published each day: Observational study on trends in epidemiology and reporting over the years 2000-2019.
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Hoffmann F, Allers K, Rombey T, Helbach J, Hoffmann A, Mathes T, and Pieper D
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- Forecasting, Humans, Retrospective Studies, Biomedical Research statistics & numerical data, Epidemiologic Studies, Meta-Analysis as Topic, Publications statistics & numerical data, Publications trends, Research Report trends, Systematic Reviews as Topic
- Abstract
Background: Systematic reviews (SRs) are useful tools in synthesising the available evidence, but high numbers of overlapping SRs are also discussed in the context of research waste. Although it is often claimed that the number of SRs being published is increasing steadily, there are no precise data on that. We aimed to assess trends in the epidemiology and reporting of published SRs over the last 20 years., Methods: A retrospective observational study was conducted to identify potentially eligible SRs indexed in PubMed from 2000 to 2019. From all 572,871 records retrieved, we drew a simple random sample of 4,000. The PRISMA-P definition of SRs was applied to full texts and only SRs published in English were included. Characteristics were extracted by one reviewer, with a 20% sample verified by a second person., Results: A total of 1,132 SRs published in 710 different journals were included. The estimated number of SRs indexed in 2000 was 1,432 (95% CI: 547-2,317), 5,013 (95% CI: 3,375-6,650) in 2010 and 29,073 (95% CI: 25,445-32,702) in 2019. Transparent reporting of key items increased over the years. About 7 out of 10 named their article a SR (2000-2004: 41.9% and 2015-2019: 74.4%). In 2000-2004, 32.3% of SRs were based in the UK (0% in China), in 2015-2019 24.0% were from China and 10.8% from the UK. Nearly all articles from China (94.9%) conducted a meta-analysis (overall: 58.9%). Cochrane reviews (n = 84; 7.4%) less often imposed language restrictions, but often did not report the number of records and full texts screened and did not name their article a SR (22.6% vs. 73.4%)., Conclusions: We observed a more than 20-fold increase in the number of SRs indexed over the last 20 years. In 2019, this is equivalent to 80 SRs per day. Over time, SRs got more diverse in respect to journals, type of review, and country of corresponding authors. The high proportion of meta-analyses from China needs further investigation., Study Registration: Open Science Framework (https://osf.io/pxjrv/)., (Copyright © 2021 The Author(s). Published by Elsevier Inc. All rights reserved.)
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- 2021
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18. Changes in Digital Media Use and Physical Activity in German Young Adults under the Covid-19 Pandemic - A Cross-Sectional Study.
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Helbach J and Stahlmann K
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- Adult, Cross-Sectional Studies, Exercise, Female, Humans, Internet, Male, Young Adult, COVID-19 epidemiology, Pandemics
- Abstract
Many studies observed a reduction of physical activity (PA) and an increase in digital media use in young adults during the COVID-19 pandemic. However, few studies have been conducted in Europe or looked at changes in the association between both behaviors. Hence, this study aims at investigating the changes in digital media use/social media use and PA as well as in its association among young adults in Germany. Cross-sectional data of 884 German young adults (mean age 22.36 (±1.99), 76% female) collected via an online questionnaire between August 1 and September 30, 2020 were analyzed. Participants reported on digital media use (smartphone, television, computer, gaming console), social media use (Facebook, Instagram, Snapchat, Twitter, YouTube, TikTok) and PA (days/week of ≥30 min. PA) separately for the period of strict infection control measures in Germany (March - end of May 2020) and for normal times (before March 2020). Descriptive statistics of digital media use, social media use and PA were compared between both periods. Linear regression adjusted for sociodemographic and work-related characteristics were conducted for both periods with total media use, the various media devices and social media use, respectively, as independent and PA as dependent variables. Whereas PA did not differ between both periods, mean total digital media use increased by 1 hour during the period of strict infection control measures. Digital media use and social media use were negatively associated with PA in both time periods. Differences in these associations by sex could be found for some digital media devices. However, 60% of respondents did not comply with the WHO recommendations for PA. Under consideration of possible recall bias, young adults' digital media use, but not PA, seemed to have changed under the strict infection control measures. However, interventions are needed to increase PA and to prevent its reduction in the course of the pandemic., (© Journal of Sports Science and Medicine.)
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- 2021
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19. Retention as an integrated biodiversity conservation approach for continuous-cover forestry in Europe.
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Gustafsson L, Bauhus J, Asbeck T, Augustynczik ALD, Basile M, Frey J, Gutzat F, Hanewinkel M, Helbach J, Jonker M, Knuff A, Messier C, Penner J, Pyttel P, Reif A, Storch F, Winiger N, Winkel G, Yousefpour R, and Storch I
- Subjects
- Biodiversity, Conservation of Natural Resources, Europe, Forests, Trees, Ecosystem, Forestry
- Abstract
Retention forestry implies that biological legacies like dead and living trees are deliberately selected and retained beyond harvesting cycles to benefit biodiversity and ecosystem functioning. This model has been applied for several decades in even-aged, clearcutting (CC) systems but less so in uneven-aged, continuous-cover forestry (CCF). We provide an overview of retention in CCF in temperate regions of Europe, currently largely focused on habitat trees and dead wood. The relevance of current meta-analyses and many other studies on retention in CC is limited since they emphasize larger patches in open surroundings. Therefore, we reflect here on the ecological foundations and socio-economic frameworks of retention approaches in CCF, and highlight several areas with development potential for the future. Conclusions from this perspective paper, based on both research and current practice on several continents, although highlighting Europe, are also relevant to other temperate regions of the world using continuous-cover forest management approaches.
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- 2020
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20. Exploration-exploitation trade-off features a saltatory search behaviour.
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Volchenkov D, Helbach J, Tscherepanow M, and Kühnel S
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- Female, Humans, Male, Exploratory Behavior physiology, Models, Biological, User-Computer Interface
- Abstract
Searching experiments conducted in different virtual environments over a gender-balanced group of people revealed a gender irrelevant scale-free spread of searching activity on large spatio-temporal scales. We have suggested and solved analytically a simple statistical model of the coherent-noise type describing the exploration-exploitation trade-off in humans ('should I stay' or 'should I go'). The model exhibits a variety of saltatory behaviours, ranging from Lévy flights occurring under uncertainty to Brownian walks performed by a treasure hunter confident of the eventual success.
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- 2013
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