Search results for "Chronological age"
showing 10 items of 16 documents
Functional microbiome deficits associated with ageing: chronological age-threshold
2019
Composition of the gut microbiota changes during ageing, but questions remain about whether age is also associated with deficits in microbiome function and whether these changes occur sharply or progressively. The ability to define these deficits in populations of different ages may help determine a chronological age threshold at which deficits occur and subsequently identify innovative dietary strategies for active and healthy ageing. Here, active gut microbiota and associated metabolic functions were evaluated using shotgun proteomics in three well‐defined age groups consisting of 30 healthy volunteers, namely, ten infants, ten adults and ten elderly individuals. Samples from each volunte…
A free radical theory of frailty.
2018
The free radical theory of ageing provided an intellectual framework for many laboratories working on ageing. However, experimental and clinical evidence showing that high doses of antioxidants do not have an effect on ageing or on age-associated diseases, cast doubts on the validity of this theory. Data from our own laboratory show that oxidative damage does not correlate with age, especially in the geriatric population, but rather with the frailty state. This has led us to postulate the free radical theory of frailty that proposes that oxidative damage is associated with frailty, but not with chronological age itself. Superoxide dismutase deficient mice are more frail than controls. But m…
The relationship of mandibular radiomorphometric indices to skeletal age, chronological age and skeletal malocclusion type
2017
Background The present study was performed with the following aims: (1) to assess the relationship between skeletal age, measured using the cervical vertebral maturity (CVM) method, and chronological age; (2) to determine the correlation of skeletal and chronological age to the cortical thickness of the lower border of the mandible using the linear radiomorphometric; and (3) to explore the relationship between these indices and skeletal malocclusion type. Material and methods The data were collected from the records of 180 patients, including 57 males (31.7%) and 123 females (68.3%). The data were based on the panoramic and lateral cephalograms of each patient. The CVM stages were determine…
Metaphor comprehension in children with and without autism spectrum disorder
2020
Abstract Metaphor comprehension was studied in three groups of children from 6 to 12 years old: a group with autism spectrum disorder with level 2 severity (ASD, n = 22) and two comparison groups with typical development: one matched with the ASD group on chronological age (TCD group, n = 22) and the other matched on linguistic age (TLD group, n = 22). The TCD group performed better than the TLD group, which performed better than the ASD group, on the comprehension of both conventional and novel metaphors, with better performance found on conventional metaphors than on novel ones. We suggest that both linguistic and extralinguistic competencies (usually limited in level 2 ASD) would be nece…
Age Identification: A Comparison between Finnish and North-American Cultures
1998
This study examined perceptions of age among Finnish males and females in three age groups; twenty-five to thirty-nine-year-olds ( n = 446), forty to fifty-four-year-olds ( n = 482) and fifty-five to sixty-four-year-olds ( n = 427). The age perceptions of the Finnish sample were further compared with those of a North-American sample with corresponding age groups ( n = 169, n = 187, n = 222) reported by Barak, Stern, and Gould (1988). Four age concepts used were chronological age, subjective age, ideal age, and disparity age. As expected on the basis of previous studies in age identification, no difference was found between Finnish males and females in terms of subjective age. Ideal age, ho…
Reading Disabilities in children with Specific Language Impairment
2019
El presente estudio examinó el rendimiento en lectura de los niños con Trastorno Específico del Lenguaje (TEL). Treinta niños con TEL y 32 niños con desarrollo normal del lenguaje, equilibrados en género, edad cronológica e inteligencia, fueron evaluados mediante el PROLEC-R. Los resultados de los ANOVAs indicaron que ambos grupos difieren en el rendimiento en lectura. Como grupo, los niños con TEL tuvieron significativamente un rendimiento inferior, tanto en la exactitud como en el tiempo de la lectura de palabras y pseudopalabras, por lo que tenían una menos eficacia de lectura. En la misma línea, el rendimiento de los niños con TEL en comprensión literal e inferencial también fue inferio…
Protein patterns in rotifers: the timing of aging
1989
Single rotifer individuals have been characterized biochemically to obtain a fingerprint of their physiological state using a modified ultrasensitive silver-stain procedure to detect total proteins in polyacrylamide gels. Patterns are completely uniform for young isogenic individuals raised in the same culture, but they start to change when these individuals reach a certain age. This age is close to the mean lifespan and to both the cessation of body growth and reproduction. Variability is greatest among individuals of the same chronological age, thus the rate of aging is different even among individuals having identical genotypes and experiencing the same environment.
Change in subjective age among older people over an eight-year follow-up: 'getting older and feeling younger?'.
2006
The purpose of this prospective study was to describe changes in subjective age over an 8-year period among community-dwelling people aged 65 to 84 years in Finland. At the baseline 1155 respondents met study criteria and 451 of these participated in the follow-up study. Participants described in years the age they felt themselves to be (feel age) and their preferred age (ideal age). Discrepancy scores relative to chronological age were calculated for feel age and ideal age. No significant mean-level changes were observed in the age discrepancy scores over the 8-year time frame. The baseline discrepancy between chronological and feel age remained constant among 48% of the participants, with…
The skeletal maturity of Australian children aged 10-13 years in 2016.
2021
Skeletal maturity can be used as a biological indicator of the tempo of growth in children and adolescents. We present a description of skeletal maturity from a cohort of white Australian children and describe variation in skeletal maturity based on child age. Participants (n = 71; age 10.5-13.9 years) were recruited from the 'Healthy, Active Preschool & Primary Years (HAPPY)' study. Left hand-wrist radiographs were used to determine skeletal maturity using the Tanner-Whitehouse III (TW3) RUS technique. In boys, the mean skeletal maturity offset (bone age - chronological age) was -0.12 ± 0.19 years and 57.9% had delayed skeletal maturity compared to chronological age. Among those with delay…
Accuracy of the estimation of dental age in comparison with chronological age in a Spanish sample of 2641 living subjects using the Demirjian and Nol…
2016
Age estimation is an important procedure in forensic medicine and is carried out for a number of reasons. For living persons, age estimation is performed in order to assess whether a child has attained the age of criminal responsibility, in scenarios involving rape, kidnapping or marriage, in premature births, adoption procedures, illegal immigration, pediatric endocrine diseases and orthodontic malocclusion, as well as in circumstances in which the birth certificate is not available or the records are suspect. According to data from the UNHCR (United Nations High Commissioner for Refugees), the number of people seeking refugee status continued to increase in the last years, driven by the w…