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702 results for “Longitudinal study”
Bone structural data for the Denver Longitudinal Growth Study
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Data from: The subcortical basis of outcome and cognitive impairment in TBI: a longitudinal cohort study
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Longitudinal Saliva Omics Responses to Immune Perturbation: A Case Study
<p>Online Data Files [ODFs] accompanying manuscript "Longitudinal Saliva Omics Responses to Immune Perturbation: A Case Study"</p>
Data from: A longitudinal study of age-related changes in Haemoproteus infection in a passerine bird
Blood parasites such as malaria and related haemosporidians commonly infect vertebrate species including birds. Understanding age-specific patterns of parasite infections is crucial for quantifying the fitness consequences of parasitism for hosts and for understanding parasite transmission dynamics. We analyzed longitudinal and cross-sectional infection data in house martins Delichon urbica, a migratory bird suffering from intense haemosporidian infection. We separated within- from among-individual effects of age on prevalence. Our results showed that the probability of blood parasite infection increased as individual house martins aged. We also showed that the prevalence of infection decreased with age at last reproduction when controlling for age, showing a selective disappearance of infected birds from the population (i.e. selection). The estimated effect of age on prevalence was underestimated two- to three-fold if not accounting for such selection. This study highlights the importance of taking among-individual heterogeneity in the capacity to fight a disease into account because such heterogeneity can mask age-related patterns of infection. These findings emphasize the relevance of considering within- and among-individual patterns of infection in order to understand parasite-induced mortality and the potential for parasite transmission.
Data from: Longitudinal recordings of the vocalizations of immature Gombe chimpanzees for developmental studies
Many researchers are interested in chimpanzee vocal communication, both as an important aspect of chimpanzee social behavior and as a source of insights into the evolution of human language. Nonetheless, very little is known about how chimpanzee vocal communication develops from infancy to adulthood. The largest dataset of audiorecordings from free-living immature chimpanzees was collected by the late Hetty van de Rijt-Plooij and Frans X. Plooij at Gombe National Park, Tanzania (1971–1973). These recordings have not yet been analysed. Therefore, the most extensive effort to study the development of chimpanzee vocalizations remains unfinished. The audiospecimens total over 10 h on 28 tapes, including 20 tapes focusing on 17 specific immature individuals with a total of 1,136 recordings. In order to make this dataset available to more researchers, the analogue sound recordings were digitized and stored in the Macaulay Library and the Dryad Repository. In addition, the original notes on the contexts of the calls were translated and transcribed from Dutch into English.
Data from: Gray matter volume modifications in migraine: a cross-sectional and longitudinal study
Objective. To explore cross-sectional and longitudinal gray matter (GM) volume changes in migraine patients and their association with patients' clinical characteristics and disease activity. Methods. Brain T2-weighted and 3D T1-weighted scans were acquired from 73 episodic migraineurs and 46 age- and sex-matched non-migraine controls at baseline. Twenty-four migraineurs and 25 controls agreed to be re-examined after a mean follow-up of 4 years. Using a general linear model and SPM12, a whole-brain analysis was performed to assess GM volume modifications. Results. At baseline, compared to controls, migraine patients showed lower cerebellar GM volume and higher volume of regions of the fronto-temporal lobes. At follow-up, migraineurs were significantly older than controls. Over the follow-up, migraineurs developed an increased volume of fronto-temporo-parietal regions, which was more prominent in patients with a higher baseline disease activity: long disease duration and high attack frequency. Migraineurs also developed decreased GM volume of visual areas, which was related to higher pain severity. Patients with an increased attack frequency at follow-up experienced both increased and decreased volume of nociceptive regions. In migraineurs, reduced GM volume of extrastriate visual areas during the follow-up was significantly correlated to baseline disease activity: shorter disease duration and lower attack frequency. Conclusion. In this cohort, the migraine brain changes dynamically over time and different pathophysiological mechanisms can occur in response to patients' disease severity. The interaction between predisposing brain traits and experience-dependent responses might vary across different nociceptive and visual areas, thus leading to distinct patterns of longitudinal GM volume changes.
Data from: Longitudinal study of performance on the Ruff Figural Fluency Test in persons aged 35 years or older
The Ruff Figural Fluency Test (RFFT) is a cognitive test to measure executive function. Longitudinal studies have shown that repeated testing improves performance on the RFFT. Such a practice effect may hinder the interpretation of test results in a clinical setting. Therefore, we investigated the longitudinal performance on the RFFT in persons aged 35–82 years. Performance on the RFFT was measured three times over an average follow-up period of six years in 2,515 participants of the Prevention of REnal and Vascular ENd-stage Disease (PREVEND) study in Groningen, the Netherlands: 53% men; mean age (SD), 53 (10) years. The effect of consecutive measurements on performance on the RFFT was investigated with linear multilevel regression models that also included age, gender, educational level and the interaction term consecutive measurement number x age as independent variables. It was found that the mean (SD) number of unique designs on the RFFT increased from 73 (26) at the first measurement to 79 (27) at the second measurement and to 83 (26) at the third measurement (p<0.001). However, the increase per consecutive measurement number was negatively associated with age and decreased with 0.23 per one-year increment of age (p<0.001). The increase per consecutive measurement number was not dependent on educational level. Similar results were found for the median (IQR) number of perseverative errors which showed a small but statistically significant increase with repeating testing: 7 (3–13) at the first measurement, 7 (4–14) at the second measurement and 8 (4–15) at the third measurement (ptrend = 0.002). In conclusion, the performance on the RFFT improved by repeating the test over an average follow-up period of three to six years. This practice effect was the largest in young adults and not dependent on educational level.
Data from: Incidence of influenza A(H3N2) virus infections in Hong Kong in a longitudinal sero-epidemiological study, 2009-2015
Background: Many serologic studies were done during and after the 2009 influenza pandemic, to estimate the cumulative incidence of influenza A(H1N1)pdm09 virus infections, but there are few comparative estimates of the incidence of influenza A(H3N2) virus infections during epidemics. Methods: We conducted a longitudinal serologic study in Hong Kong. We collected sera annually and tested samples from 2009-13 by HAI against the A/Perth/16/2009(H3N2) virus, and samples from 2013-15 against the A/Victoria/361/2011(H3N2) virus using the hemagglutination inhibition (HAI) assay. We estimated the cumulative incidence of infections based on 4-fold or greater rises in HAI titers in consecutive sera. Results: There were four major H3N2 epidemics: (1) Aug-Oct 2010; (2) Mar-Jun 2012; (3) Jul-Oct 2013; and (4) Jun-Jul 2014. Between 514 516 and 614 619 relevant pairs of sera were available for each epidemic. We estimated that 98%, 2019%, 57% and 7% of the population were infected in each epidemic, respectively, with higher incidence in children in epidemics 1 and 4. Conclusions: We estimatedfound that around 5% to 20% of the Hong Kong population were infectedre-infections in each of the four H3N2 epidemics that occurred from 2010 through 2014 were rare. The largest H3N2 epidemic occurred with the lowest level of pre-epidemic immunity.
Data from: Within guild co-infections influence parasite community membership: a longitudinal study in African Buffalo
1. Experimental studies in laboratory settings have demonstrated a critical role of parasite interactions in shaping parasite communities. The sum of these interactions can produce diverse effects on individual hosts as well as influence disease emergence and persistence at the population level. 2. A predictive framework for the effects of parasite interactions in the wild remains elusive, largely because of limited longitudinal or experimental data on parasite communities of free-ranging hosts. 3. This four year study followed a community of haemoparasites in free-ranging African buffalo (Syncerus caffer). We detected infection by 11 haemoparasite species using PCR-based diagnostic techniques, and analyzed drivers of infection patterns using generalized linear mixed models to understand the role of host characteristics and season on infection likelihood. We tested for (1) effects of co-infection by other haemoparasites (within guild) and (2) effects of parasites infecting different tissue types (across guild). 4. We found that within guild co-infections were the strongest predictors of haemoparasite infections in the buffalo; but that seasonal and host characteristics also had important effects. In contrast, the evidence for across-guild effects of parasites utilizing different tissue on haemoparasite infection was weak. 5. These results provide a nuanced view of the role of co-infections in determining haemoparasite infection patterns in free living mammalian hosts. Our findings suggest a role for interactions among parasites infecting a single tissue type in determining infection patterns.
Data from: Inferring longitudinal hierarchies: framework and methods for studying the dynamics of dominance
1. Social inequality is a consistent feature of animal societies, often manifesting as dominance hierarchies, in which each individual is characterized by a dominance rank denoting its place in the network of competitive relationships among group‐members. Most studies treat dominance hierarchies as static entities despite their true longitudinal, and sometimes highly dynamic, nature. 2. To guide study of the dynamics of dominance, we propose the concept of a longitudinal hierarchy: the characterization of a single, latent hierarchy and it's dynamics over time. Longitudinal hierarchies describe the hierarchy position (r) and dynamics (∆) associated with each individual as a property of its interaction data, the periods into which these data are divided based on a period delineation rule (p), and the method chosen to infer the hierarchy. Hierarchy dynamics result from both active (∆a) and passive (∆p) processes. Methods that infer longitudinal hierarchies should optimize accuracy of rank dynamics as well as of the rank orders themselves, but no studies have yet evaluated the accuracy with which different methods infer hierarchy dynamics. 3. We modify three popular ranking approaches to make them better suited for inferring longitudinal hierarchies. Our three 'informed' methods assign ranks that are informed by data from the prior period rather than calculating ranks de novo in each observation period, and use prior knowledge of dominance correlates to inform placement of new individuals in the hierarchy. These methods are provided in an R package. 4. Using both a simulated dataset and a long‐term empirical dataset from a species with two distinct sex‐based dominance structures, we compare the performance of these methods and their unmodified counterparts. We show that choice of method has dramatic impacts on inference of hierarchy dynamics via differences in estimates of ∆a. Methods that calculate ranks de novo in each period overestimate hierarchy dynamics, but incorporation of prior information leads to more accurately inferred ∆a. Of the modified methods, Informed MatReorder infers the most conservative estimates of hierarchy dynamics and Informed Elo infers the most dynamic hierarchies. 5. This work provides crucially needed conceptual framing and methodological validation for studying social dominance and its dynamics.
Vitamin D Deficiency and Pregnancy Outcome: A longitudinal Interventional Study
<p><strong><u><span>ABSTRACT</span></u></strong><span>:</span></p> <p><strong><span>Introduction:</span></strong><span> <span>Vitamin D is a fat-soluble vitamin responsible for increasing the absorption of calcium, magnesium, phosphate, and multiple other biological effects. Deficiency of vitamin D is a common global problem, especially in females. It is naturally produced by the body on exposure to sunlight. Deficiency of vitamin D in pregnancy predisposes to pre-eclampsia, GDM, preterm birth to the mother, hypocalcemic tetany, low birth weight, and congenital rickets in the fetus. In general, 10 (400) units of vitamin D are recommended for all pregnant women per day.</span></span><span> <strong><span>Materials and methods:</span></strong> The study was conducted in the OBGY department of MGM Medical College, Aurangabad, Maharashtra, between August 2022 to August 2023. A complete procedure was explained to all the second-trimester pregnant women willing to participate in this study, and informed written consent was obtained from them. Their detailed history was taken and subjected to an estimation of 25 hydroxyvitamin D and serum calcium. <strong><span>Results:</span></strong> A high prevalence of vitamin D deficiency is found (81%). In teenage pregnancy, the occurrence of vitamin D deficiency is higher. In our study, vitamin D deficiency was more prevalent in rural areas thanurban areas. It was more in the Muslim population. A sedentary life is prone to vitamin D deficiency. The incidence of GDM, pre-eclampsia, and low birth weight was significantly lower in tested and treated patients. Empirical vitamin D supplementation should be given to each pregnant patient.</span></p> <p><strong><em><span> </span></em></strong></p> <p><strong><em><span>Keywords: GDM, Preeclampsia, prevalence, teenage pregnancy, low birth weight.</span></em></strong></p> <p><span> </span></p>
A digital phenotyping dataset for impending panic symptoms: a prospective longitudinal study
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A digital phenotyping dataset for impending panic symptoms: a prospective longitudinal study
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FIG.. Australiagraecia curvata. A. Dorsal view male abdomen. Note short, broad supra-anal plate and curvature of cerci. B. Dorsal view adult male. Note broad longitudinal stripe extending through tegmen and transverse sulcus of pronotum. C. Dorsal view head and pronotum. D. Ventral view subgenital plate, adult male. E. Male tegmen. in Studies in Australian Tettigoniidae: New short-winged Agraeciini from Australia (Orthoptera: Tettigoniidae; Conocephalinae; Agraeciini)
FIG.. Australiagraecia curvata. A. Dorsal view male abdomen. Note short, broad supra-anal plate and curvature of cerci. B. Dorsal view adult male. Note broad longitudinal stripe extending through tegmen and transverse sulcus of pronotum. C. Dorsal view head and pronotum. D. Ventral view subgenital plate, adult male. E. Male tegmen.
Supplementary figures to Effect of bisphosphonates on vertebral fractures in HIV infected males: 7-years longitudinal study
<p>Supplementary figures to Effect of bisphosphonates on vertebral fractures in HIV infected males: 7-years longitudinal study</p>
Dataset of the study "Psychological factors and trajectories of post-surgical pain: A longitudinal prospective study"
<p>Dataset of the study "Psychological factors and trajectories of post-surgical pain: A longitudinal prospective study" published in Pain Practice, 2022 Feb; 22(2): 159-170. doi: 10.1111/papr.13074</p>
A longitudinal study of the pulmonary mycobiome in subjects with and without chronic obstructive pulmonary disease
Background <p>Few studies have examined the stability of the pulmonary mycobiome. We report longitudinal changes in the oral and pulmonary mycobiome of participants with and without COPD in a large-scale bronchoscopy study (MicroCOPD).</p> <div class="section toc-section"> Methods <p>Repeated sampling was performed in 30 participants with and 21 without COPD. We collected an oral wash (OW) and a bronchoalveolar lavage (BAL) sample from each participant at two time points. The internal transcribed spacer 1 region of the ribosomal RNA gene cluster was PCR amplified and sequenced on an Illumina HiSeq sequencer. Differences in taxonomy, alpha diversity, and beta diversity between the two time points were compared, and we examined the effect of intercurrent antibiotic use.</p> </div> <div class="section toc-section"> Results <p>Sample pairs were dominated by <em>Candida</em>. We observed less stability in the pulmonary taxonomy compared to the oral taxonomy, additionally emphasised by a higher Yue-Clayton measure in BAL compared to OW (0.69 vs 0.22). No apparent effect was visually seen on taxonomy from intercurrent antibiotic use or participant category. We found no systematic variation in alpha diversity by time either in BAL (p-value 0.16) or in OW (p-value 0.97), and no obvious clusters on bronchoscopy number in PCoA plots. Pairwise distance analyses showed that OW samples from repeated sampling appeared more stable compared to BAL samples using the Bray-Curtis distance metric (p-value 0.0012), but not for Jaccard.</p> </div> <div class="section toc-section"> Conclusion <p>Results from the current study propose that the pulmonary mycobiome is less stable than the oral mycobiome, and neither COPD diagnosis nor intercurrent antibiotic use seemed to influence the stability.</p> </div>
Datasets Correlational Longitudinal Studies (Task 4.4, D4.3)
<p>The datasets are part of WP4 and the Report correlational longitudinal studies (D4.3). Data for this deliverable was collected among various types of energy communities and within different sociopolitical contexts:</p> <ul> <li>A representative sample of the Dutch general population via a pre-recruited panel (based on gender, education, income, and age; 3 waves with 6 months in between) & a gender representative sample of the Spanish general population via a pre-recruited panel (3 waves with 6 months in between).</li> <li>Members and non-members of a network of local energy initiatives called Buurkracht (which roughly translates to “neighbor power”) in the Netherlands (2 waves with 9 months in between)</li> <li>Members of the Global Ecovillage Network (GEN) in Europe (2 waves with 12 months in between).</li> <li>Members of various energy communities in Europe (EU Ecom) via REScoop, the European federation of citizen energy cooperatives, and via the Local Governments for Sustainability global network (ICLEI).</li> <li>The Polish Housing Cooperative Wroclaw South (HCWS) in which multiple energy community initiatives were initiated such as an initiative among residents to collectively decide to install PV systems on a particular building</li> </ul> <p>Available upon request:</p> <ul> <li> <p>More extensive versions of these datasets (e.g., including socio-demographics, levels of involvement in energy communities, number of contacts within energy community, more detailed household energy measures) are available upon request via DataverseNL (<a href="https://doi.org/10.34894/YJDPEB">https://doi.org/10.34894/YJDPEB). </a></p> </li> </ul> <p><em>Note. </em>An earlier version of Task4.1-D4.3_BK-Longitudinal Data_anonymized, when not all data was collected yet, was also used for Deliverable D2.3 <a href="https://online-raketen.at/sites/site0261/media/downloads/d2.3_energy_citizenship_scale_-_validation_study_final_version.pdf">Energy citizenship scale - Validation Study</a> and as such stored in folder Datasets Energy Citizenship Scale Development and Validation (Task 2.4, D2.2, D2.3; <a href="https://doi.org/10.5281/zenodo.11367936">https://doi.org/10.5281/zenodo.11367936</a>). </p>
Metadata description regarding a study "Competitiveness and value creation: Longitudinal analysis of sawmills and wood construction element producers in Finland"
<p>This dataset is supplied by a commercial information service and is subject to usage restrictions. As such, the dataset itself cannot be publicly shared. This metadata description offers detailed information about the dataset's content and structure.</p>
Interaction of household air pollution and healthy lifestyle on the risk of sarcopenia: China Health and Retirement Longitudinal Study
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ScienceDex guides
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.