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135 results for “Aging Test”
Quantifying the age-structure of free-ranging delphinid populations: testing the accuracy of Unoccupied Aerial System-photogrammetry
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Testing for age- and sex- specific mitonuclear epistasis in Drosophila
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Can age-related changes in parental care modulate inbreeding depression? A test using the burying beetle, Nicrophorus orbicollis
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Risky sexual behaviours and utilization of HIV testing services among the adolescent girls and young women aged between 15-24 years in Kibra Sub County, Nairobi County, Kenya
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Number of bovine animals tested by age group, reporting country and target group, 2019
<p>The tables contain the number of bovine animals tested by age group, reporting country and target group, 2019</p>
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: Reference data for the Ruff Figural Fluency Test stratified by age and educational level
The Ruff Figural Fluency Test (RFFT) was developed to avoid the difficulties that were encountered in earlier tests of figural fluency. Although the test characteristics of the RFFT seem to be good and it is a valuable addition to neuropsychological assessments, reference data are still scarce. To this aim, we required 2,404 community dwelling persons in Groningen, The Netherlands to perform the RFFT. All 1,651 persons with a complete RFFT and known educational level formed the reference sample. Their age ranged from 35 to 82 years and their educational level from primary school to university grade. Ninety-six percent of the persons were of Western European descent. All tests were analyzed by two independent examiners and subsequently three measures were calculated: number of unique designs, number of perseverative errors and error ratio. The main finding was that performance on the RFFT was dependent on age and educational level. This was not only observed in older persons but also in young and middle-aged persons. Reference data for the three RFFT measures are presented in groups of five years of age ranging from 35-39 years to 75 years or older.
Data from: Clock model makes a large difference to age estimates of long-stemmed clades with no internal calibration: a test using Australian grasstrees
Background: Estimating divergence times in phylogenies using a molecular clock depends on accurate modeling of nucleotide substitution rates in DNA sequences. Rate heterogeneity among lineages is likely to affect estimates, especially in lineages with long stems and short crowns ("broom" clades) and no internal calibration. We evaluate the performance of the random local clocks model (RLC) and the more routinely employed uncorrelated lognormal relaxed clock model (UCLN) in situations in which a significant rate shift occurs on the stem branch of a broom clade. We compare the results of simulations to empirical results from analyses of a real rate-heterogeneous taxon – Australian grass trees (Xanthorrhoea) – whose substitution rate is slower than in its sister groups, as determined by relative rate tests. Results: In the simulated datasets, the RLC model performed much better than UCLN: RLC correctly estimated the age of the crown node of slow-rate broom clades, whereas UCLN estimates were consistently too young. Similarly, in the Xanthorrhoea dataset, UCLN returned significantly younger crown ages than RLC (mean estimates respectively 3-6 Ma versus 25-35 Ma). In both real and simulated datasets, Bayes Factor tests strongly favored the RLC model over the UCLN model. Conclusions: The choice of an unsuitable molecular clock model can strongly bias divergence time estimates. In particular, for data predicted to have more rate variation among than within clades, dating with RLC is much more likely to be accurate than with UCLN. The choice of clocks should be informed by the biology of the study group (e.g., life-form) or assessed with relative rate tests and post-hoc model comparisons.
Number of bovine animals tested by age group, reporting country and target group, 2021
<p>The tables contain the number of bovine animals tested by age group, reporting country and target group, 2021.</p>
Data from: A significant component of ageing (DNA damage) is reflected in fading breeding colors: an experimental test using innate antioxidant mimetics in painted dragon lizards
A decade ahead of their time, von Schantz and coworkers united sexual selection and free radical biology by identifying causal links between deep-rooted physiological processes that dictate resistance to toxic waste from oxidative metabolism (reactive oxygen species), and phenotypic traits, such as ornaments. Ten years later, these ideas have still only been tested with indirect estimates of free radical levels (oxidative stress) subsequent to the action of innate and dietary antioxidants. Here we measure net superoxide (a selection pressure for antioxidant production) and experimentally manipulate superoxide antioxidation using a synthetic mimetic of superoxide dismutase, Eukarion 134 (EUK). We then measure the toxic effect of superoxide in terms of DNA erosion and concomitant loss of male breeding coloration in the lizard, Ctenophorus pictus. Control males suffered more DNA damage than EUK-males. Spectroradiometry showed that male coloration is lost in relation to superoxide and covaries with DNA erosion; in control males these variables explained 72 % of color loss, whereas in EUK males, the fading of coloration was unaffected by superoxide and unrelated to DNA damage. Thus, EUK's powerful antioxidation removes the erosion effect of superoxide on coloration and experimentally verifies the prediction that colors reflect innate capacity for antioxidation.
Keep On Keep Up Bladder Health: Co-creating and Testing a Self-management Technological Solution for Ageing Well
ClinicalTrials.gov study NCT06583733. IPD Sharing: Not stated. Countries: 3. Publications: 1.
Predictive and Prognostic Significance of Age,Blood Tests,Comorbidities(ABC) Score,Cologne Watch(C-watch)Score and Rockall Score for Risk of Variceal Re-bleeding Among Cirrhotic Patients
ClinicalTrials.gov study NCT06335186. IPD Sharing: NO. Countries: 1. Publications: 4.
Age 6 Test of Home Visits by Nurses vs Paraprofessionals
ClinicalTrials.gov study NCT00438282. IPD Sharing: Not stated. Countries: 1. Publications: 3.
Testing if BCG (Bacille Calmette-Guérin) Vaccination Can Induce Innate Immune Training in Adult People Above 50 Years of Age in Guinea-Bissau
ClinicalTrials.gov study NCT02953327. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Assessing Lower Extremity Dynamic Stability in Middle-Aged and Elderly Patients With Patellofemoral Pain Using the Y-Balance Test
ClinicalTrials.gov study NCT07068984. IPD Sharing: YES. Countries: 1. Publications: 1.
Testing the Cog-Fun Aging Program for Older Adults With Subjective Cognitive Decline
ClinicalTrials.gov study NCT06816797. IPD Sharing: NO. Countries: 1. Publications: 4.
PIIR Study: Comparison of Genetic Tests for Age-Related Macular Degeneration
ClinicalTrials.gov study NCT02779686. IPD Sharing: NO. Countries: 1. Publications: 3.
Preimplantation Genetic Testing in Women of Advanced Maternal Age
ClinicalTrials.gov study NCT04167748. IPD Sharing: NO. Countries: 1. Publications: 4.
A Study to Test if Fremanezumab is Effective in Preventing Chronic Migraine in Participants 6 to 17 Years of Age
ClinicalTrials.gov study NCT04464707. IPD Sharing: YES. Countries: 9. Publications: 0.
Data from: A significant component of ageing (DNA damage) is reflected in fading breeding colors: an experimental test using innate antioxidant mimetics in painted dragon lizards
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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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
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