scholarly journals Five reasons COVID-19 is less severe in younger age groups

Author(s):  
Paul W Turke

Abstract The severity of COVID-19 is age-related, with the advantage going to younger age groups. Five reasons are presented. The first two are well-known, are being actively researched by the broader medical community, and therefore are discussed only briefly here. The third, fourth, and fifth reasons derive from evolutionary life history theory, and potentially fill gaps in current understanding of why and how young and old age groups respond differently to infection with SARS-CoV-2. Age of onset of generalized somatic aging, and the timing of its progression, are identified as important causes of these disparities, as are specific antagonistic pleiotropic tradeoffs in immune system function.

PLoS ONE ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. e0249906
Author(s):  
Richard Hauer ◽  
Paul Störchle ◽  
Bettina Karsten ◽  
Harald Tschan ◽  
Arnold Baca

This study investigated the activity profile during small-sided games (SSG) in elite youth soccer players. Internal load (IL) including heart rate (HR) and external load (EL) such as distance covered in different speed-zones (SZ) were collected from forty-eight players of three different teams (U15, U16, U18). The investigation included a total of eighteen 5vs.5 SSGs, each consisting of four 2-minute bouts on a 40x32m pitch during spring season. Total group results (n = 48) showed a reduction in total-distance (p = 0.001; ηp2 = 0.12), high-intensity-running (p = 0.009; ηp2 = 0.09), and low-intensity-running distance (p = 0.028; ηp2 = 0.07) between bouts. Similarly, a reduction in the number of both acceleration-low (p = 0.001; ηp2 = 0.12) and deceleration-high (p = 0.003; ηp2 = 0.11) values was observed. Additionally, time spent in HR-zones 3 and 4 (p≤0.007; ηp2 ≥ 0.10), increased, with a reduction in HR-zone 1 (p = 0.000, ηp2 = 0.25). Age group comparison showed less distance covered in SZ 1 (p≤0.000; ηp2 = 0.56) and greater deceleration-high values (p≤0.038; ηp2 = 0.32) in U15 players compared to other age groups. Further, U15 showed lower values in low-intensity-running compared to U18 (p = 0.038; ηp2 = 0.22). No age-related differences were found for IL and repeated sprint ability (RSA) values. The higher EL in younger age groups should be taken into account when implementing soccer specific SSGs. In addition, HRmean values between 80–85% of HRmax and RSA numbers, which are similar to match-play data, indicate SSGs as an effective training tool to prepare youth soccer athletes for the demands of competition.


Sensors ◽  
2019 ◽  
Vol 19 (15) ◽  
pp. 3377 ◽  
Author(s):  
Daniel Arvidsson ◽  
Jonatan Fridolfsson ◽  
Christoph Buck ◽  
Örjan Ekblom ◽  
Elin Ekblom-Bak ◽  
...  

Accelerometer calibration for physical activity (PA) intensity is commonly performed using Metabolic Equivalent of Task (MET) as criterion. However, MET is not an age-equivalent measure of PA intensity, which limits the use of MET-calibrated accelerometers for age-related PA investigations. We investigated calibration using VO2net (VO2gross − VO2stand; mL⋅min−1⋅kg−1) as criterion compared to MET (VO2gross/VO2rest) and the effect on assessment of free-living PA in children, adolescents and adults. Oxygen consumption and hip/thigh accelerometer data were collected during rest, stand and treadmill walk and run. Equivalent speed (Speedeq) was used as indicator of the absolute speed (Speedabs) performed with the same effort in individuals of different body size/age. The results showed that VO2net was higher in younger age-groups for Speedabs, but was similar in the three age-groups for Speedeq. MET was lower in younger age-groups for both Speedabs and Speedeq. The same VO2net-values respective MET-values were applied to all age-groups to develop accelerometer PA intensity cut-points. Free-living moderate-and-vigorous PA was 216, 115, 74 and 71 min/d in children, adolescents, younger and older adults with VO2net-calibration, but 140, 83, 74 and 41 min/d with MET-calibration, respectively. In conclusion, VO2net calibration of accelerometers may provide age-equivalent measures of PA intensity/effort for more accurate age-related investigations of PA in epidemiological research.


Author(s):  
Rehab A Sherlala ◽  
Candace M Kammerer ◽  
Allison L Kuipers ◽  
Mary K Wojczynski ◽  
Svetlana V Ukraintseva ◽  
...  

Abstract Background Serum levels of insulin-like growth factor 1 (IGF-1) and body mass index (BMI) are both associated with susceptibility to age-related diseases. Reports on the correlation between them have been conflicting, with both positive to negative correlations reported. However, the age ranges of the participants varied widely among these studies. Methods Using data on 4241 participants (aged 24–110) from the Long Life Family Study, we investigated the relationship between IGF-1 and BMI by age groups using regression analysis. Results When stratified by age quartile, the relationship between IGF-1 and BMI varied: in the first quartile (Q1, 20–58 years) the relationship was negative (β = −0.2, p = .002); in Q2 (58–66 years) and Q3 (67–86 years) the relationship was negative (β = −0.07, β = −0.01, respectively) but nonsignificant; and in Q4 (87–110 years) the relationship was positive (β = 0.31, p = .0002). This pattern did not differ by sex. We observed a similar age-related pattern between IGF-1 and BMI among participants in the third National Health and Nutritional Examination Survey. Conclusions Our results that the relationship between IGF-1 and BMI differs by age may explain some of the inconsistency in reports about their relationship and encourage additional studies to understand the mechanisms underlying it.


2020 ◽  
Vol 1 ◽  
pp. 100-104
Author(s):  
K.O. Maslenitcyn ◽  
◽  
M.V. Shchipakin ◽  

The basis for the study was cadaver material from animals obtained during slaughter from the "Gzhelskoe Podvorye", Moscow region. Four age groups were formed. The first group included newborn animals. The sec-ond group included animals of one month. The third group included young animals of five or six months. The fourth group consist-ed of goats, starting from one year old. The age of the animals was determined according to the data obtained from monitor cards. A total of twenty heads were examined. Based on our research, primarily we established that the change in the topography of the right and left kidney in Anglo-Nubian goats exists mainly because of the displacement of the caudal end of the kidney cranially at a dis-tance equal to the length of one or two verte-brae. In both kidneys, the anterior or cranial end does not have a pronounced displace-ment. Studying kidney syntopia in goats, we found confirmation that the caudal hollow vein together with the abdominal aorta lie dorsally from the kidneys, while the rumen sac is located laterocranially from the left kidney, when it overflows, a slight change in the topography of the kidney can be visual-ized, and parts of the duodenum are located laterocranially. The data we have established confirm the similarity of the Anglo-Nubian breed of goats with goats of other breeds. By studying the vascularization of the kidneys in the Anglo-Nubian goat breed, we con-firmed that the renal blood supply is pro-duced by two renal arteries, each of which is directed to the corresponding kidney "L2-L3". We also found that the severe increase in the diameter of the renal arteries occurs in these animals from 1 to 6 months.


2017 ◽  
Vol 7 (1) ◽  
pp. 0-0
Author(s):  
M. Zalewska ◽  
A. Zubrycki ◽  
Zenon Sosnowski ◽  
J. Jamiołkowski ◽  
M. Zakrzewski ◽  
...  

Introduction: Proper nutrition and physical activity are very important elements in the proper functioning and development of children. The lack of daily, systematic physical effort in younger and younger age groups is a public health problem. Purpose: To evaluate the nutrition and physical activity of children attending primary school. Materials and methods: The study was conducted among 707 pupils form randomly selected elementary schools using the authors’ own questionnaire in the school year 2013/2014. The questionnaire included questions on selected dietary habits and physical activity as well as the socio-economic conditions of the families. Results: Among the studied children, 88.6% consumed 4 or 5 meals a day. There was a statistically significant relationship between the number of meals consumed and the age of the children. Breakfast was consumed by 86.4% of children, more often residents of the city than the village (88.0% vs. 81.7%, p <0.05). Daily consum-ption of second breakfast was declared by 71.5% of boys and 74.2% of girls. The vast majority of the studied students (86.8%) have always taken part in physical education classes. Outdoor leisure time was declared by 75% of the surveyed children. Rural students showed greater involvement in outdoor activities than students from the city (86.1% vs. 70.2%, p <0.001). A total of 62.2% of boys and 51.8% of girls (p <0.05) participated in sports activities. Conclusions: Inappropriate nutrition and lack of physical activity affected both girls and boys, and the abnormalities were dependent on where they lived and were age-related.


2020 ◽  
Author(s):  
Nicholas Ashton ◽  
Shorena Janelidze ◽  
Ahmad Al Khleifat ◽  
Antoine Leuzy ◽  
Emma van der Ende ◽  
...  

Abstract Increased cerebrospinal fluid neurofilament light (NfL) is a recognized biomarker for neurodegeneration that can also be assessed in blood. Here, we investigate plasma NfL as a marker of neurodegeneration in fifteen neurodegenerative diseases from two multicenter cohorts: King’s College London (n = 847) and the Swedish BioFINDER study (n = 1464). Plasma NfL was significantly increased in all cortical neurodegenerative disorders, amyotrophic lateral sclerosis and atypical parkinsonian disorders. We further demonstrate that plasma NfL is clinically useful in identifying, i) atypical parkinsonian disorders in patients with parkinsonism, ii) dementia in individuals with Down Syndrome, iii) detect cases of frontotemporal dementia among psychiatric disorders such as moderate and severe depression, iv) identify frontotemporal dementia in patients with cognitive impairment. Data-driven cut-offs highlighted the fundamental importance of age-related plasma NfL cut-offs for disorders with a younger age of onset. Finally, our findings suggest that plasma NfL performs best when a concentration cut-off is applied to indicate no underlying neurodegeneration, with low false positives, in all age-related cut-offs.


2021 ◽  
Vol 5 (Supplement_1) ◽  
pp. 81-82
Author(s):  
Taylor Patskanick

Abstract The COVID-19 pandemic has impacted the generations’ health and wellbeing across a range of dimensions. In the first survey, the 50+ adopted the smallest number of health behaviors (e.g., handwashing, mask-wearing, etc.) in response to the pandemic compared to younger age groups. In the first and second surveys, the Baby Boomer generation reported less intense worry than other generations, especially regarding their socioemotional health and family members’ health. For younger generations, worries tended to increase from March to June—especially those related to socio-emotional health and COVID-19 in general. In the third survey wave, older generations self-reported better psychological wellbeing, less personal burnout, and better cognitive health compared to younger generations. Willingness to get the COVID-19 vaccine did not vary by generation in this sample; however, implications of this (including additional factors that may be influential such as psychological wellbeing) will be discussed.


Parasitology ◽  
1992 ◽  
Vol 104 (2) ◽  
pp. 371-377 ◽  
Author(s):  
L. Chan ◽  
S. P. Kan ◽  
D. A. P. Bundy

SUMMARYThis study examines the persistence of predisposition to Ascaris lumbricoides and Trichuris trichiura during repeated chemotherapy in an urban community in Kuala Lumpur, Malaysia. Significant predisposition was observed over 2 periods of reinfection with and without age-standardization of data. Analysis of different age groups indicated that predisposition was most strongly detectable in the younger age classes. The intensities of infection with both parasites were strongly correlated at each cycle of intervention, suggesting that individuals were similarly predisposed to both species.


2019 ◽  
Vol 3 (Supplement_1) ◽  
pp. S840-S841
Author(s):  
Chaitali Anand ◽  
Roya Homayouni ◽  
Qijing Yu ◽  
Sruthi Ramesh ◽  
Dalal Khatib ◽  
...  

Abstract Hippocampal glutamatergic activity plays a pivotal role in memory consolidation, including the ability to form novel associations that declines with age. To test whether glutamatergic dysfunction may underpin age-related memory declines, we examined in vivo age differences in hippocampal glutamate modulation during encoding of associations, and its relationship with hippocampal subfield volumes. Proton functional magnetic resonance spectroscopy was performed on 32 young (25.1±2.8 years; 18 females) and 16 older (65.9±2.7 years; 7 females) adults to measure changes in hippocampal (randomly assigned right or left) glutamate during an object-location paired association learning task (with 12 cycles of encoding-retrieval epochs). Volumes of the dentate gyrus&CA3, CA1, subiculum, and entorhinal cortex were manually measured from T2-weighted MRI images. Memory performance differed between the age-groups [F(1, 46)=8.56, p&lt;.01], with the older attaining a lower asymptote [t(46)=2.93, p&lt;.05] compared to the younger. Age differences in glutamate were observed only during encoding (age-group x epoch: F(3,137)=5.28, p&lt;.01), and varied over the epochs. Young adults showed increased glutamate during the first four encoding epochs of each cycle, with levels remaining high thereafter. Old adults evidenced a decrease in glutamate during the first four epochs, and a slow, sustained ramping-up afterwards. Including both age-groups, the maximum change in glutamate, calculated using the maximum and minimum levels during encoding, was positively associated with CA1 [F(2,39)=4.28, p&lt;.05] and the dentate gyrus&CA3 volume [F(2,39)=4.4, p&lt;.05], after correcting for multiple comparisons. Glutamate modulation specific to encoding may underlie age-related memory declines and be related to selected hippocampal subfield volumes.


Blood ◽  
2021 ◽  
Vol 138 (Supplement 1) ◽  
pp. 1929-1929
Author(s):  
Olufunmilayo A Bamigbola ◽  
Lorna E Warwick

Abstract Background Lymphomas can occur in all age groups but most commonly occur in older adults. Despite the shift towards patient- centered care, very little has been done to explore the information needs of patients with lymphoma by age. It is important for information to accessible to patients of all ages, as informed patients are consistently associated with better outcomes and healthcare experiences. In this study, Lymphoma Coalition (LC) describes the age-related differences in the information needs of patients with lymphoma using the 2020 LC Global Patient Survey (GPS). The objectives of this study were to identify: 1) how patients felt about the amount of information they received at diagnosis 2) the content of the information received at diagnosis and the level of understanding, and 3) their informational needs. Methods Globally, 11,878 respondents including 9,179 patients and 2,699 caregivers took part in the 2020 LC GPS. There were 9,078 patients included in this analysis who self-identified their age. These patients were grouped into five age groups for analysis: 18-29 (n=638), 30-39 (n=1,196), 40-59 (n=3,261), 60-69 (n=2,216), and 70+ (n=1,767). Demographics of the five age groups were examined, and descriptive analyses for all questions relating to information needs were performed in IBM SPSS v27. Results The five age groups differed significantly (p&lt; 0.001) in all the demographic categories examined. These categories included lymphoma subtype, sex, area of residence, education level, employment status, and household status. Patients were asked how they felt about the amount of information given to them at diagnosis. The oldest age group (70+) reported the highest prevalence (70%) of having received the right amount of information (Table 1). The younger age groups (18-29; 30-39; and 40-59) reported the highest prevalence of not receiving enough information (38%, 42%, and 41% respectively). Although not many patients reported being given too much information, of those who did, the younger age groups (18-29; 30-39; and 40-59) were the most prevalent (10%; 7%; and 5% respectively) (Table 1). Patients were asked about the type of information given to them at diagnosis, and how well they understood it. Compared to the younger age groups, the older age groups (60-69 and 70+) more frequently reported that they received and understood information given to them on different medical treatment options, the process and stages of their care, and how to manage side effects of treatment (Table 1). Patients were also asked what they needed more information about (Table 1). The top three areas that all patients needed more information about (regardless of age group) were treatment options, side effects from treatment, and their diagnosis and what it means. There was significant difference in the prevalence of how these information needs were reported between the age groups (Table 1). There was also significant difference in the prevalence of reporting a need for more information on support for self care, psychological support/counselling, and fertility across the age categories (Table 1). The lowest prevalence for needing more information in any of these areas was observed in the older age groups (60-69 and 70+), while the highest prevalence was observed in the youngest age groups (18-29 and 30-39) (Table 1). Although few patients reported not needing more information in any of these areas, its reporting was most prevalent in the older age groups (60-69 and 70+) (12% and 19%, respectively) (Table 1). Summary/Conclusions This analysis revealed that patients with lymphoma/CLL experience medical information differently across age groups. Compared to the mid and oldest patient groups, younger patients with lymphoma or CLL reported experiencing medical information differently than older patients do and reported less understanding of the medical information given to them. The younger patients also reported higher informational needs about their disease and treatment that may also be related to their age (e.g. information on fertility and family support). Clinicians should note these differences in age-group experiences and information needs, with the understanding that younger patients with lymphoma or CLL may require additional information, attention, and support. In the future, LC would like to explore how demographic differences may have confounded results. Figure 1 Figure 1. Disclosures No relevant conflicts of interest to declare.


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