Icelandic Children Research Articles

Greenhouse Gas Emissions From Icelandic Children’s Diets – Implications for Food Based Dietary Guidelines for Children

Greenhouse Gas Emissions From Icelandic Children’s Diets – Implications for Food Based Dietary Guidelines for Children

Longitudinal development and tracking of cardiorespiratory fitness from childhood to adolescence.

Cardiorespiratory fitness (CRF) is an important indicator of health in childhood and adolescence but longitudinal studies on the development and tracking of CRF from childhood to adolescence are scarce. The objectives of this study were (1) to assess longitudinal development and track CRF over 10 years from childhood to adolescence, and (2) to examine potential sex differences in the development and tracking of CRF during this period. Participants were Icelandic children born in 1999, measured at the age of 7 (n = 190, 106 girls), 9 (n = 163, 95 girls), 15 (n = 239, 134 girls), and 17 (n = 202, 119 girls). CRF was assessed with a maximal cycle ergometer test and expressed as maximal power output (Max W) and maximal power output relative to lean mass (W/kgLM). Multilevel regression models were used to study the longitudinal development of CRF, and tracking was assessed with Spearman's rank correlation, logistic regression, and the percentage of participants remaining in low, moderate, or high CRF categories between measurements. Max W and W/kgLM increased for both boys and girls up to age 15. Max W plateaued for both boys and girls while W/kgLM plateaued for girls but declined for boys from age 15 to 17. Boys had higher Max W than girls from age 15 and higher W/kgLM from age 9. CRF tracked at low to moderate levels from childhood to adolescence and at high levels in adolescence, with higher values observed for boys than girls. Age 15 was a critical time point in the development of CRF, with values starting to plateau for girls and decline for boys. The results support early intervention for improved CRF in later years, with interventions targeting all children, regardless of their CRF level.

Long COVID in Icelandic Children: A Matched Cohort Study of Nonspecific Symptoms Following SARS-CoV-2 Infection.

Pediatric severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) infections are usually mild and the mortality rates are low, but concerns have been raised about long-term symptoms that may resemble other postinfectious syndromes. Studies with robust control groups and high response rates have been few. We obtained identifiers for all 837 Icelandic children diagnosed with SARS-CoV-2 by PCR between March 2020 and June 2021 and contacted them by telephone. We asked about 10 physical and mental symptoms being present at least twice weekly for at least 2 months. Participants who reported symptoms were contacted again a year later. For each subject who completed the questionnaire, an age- and sex-matched comparator without SARS-CoV-2 infection was asked to complete the same questionnaire, and the risk difference was calculated. Responses from 643 cases and 602 comparators were analyzed. Children who had been infected with SARS-CoV-2 were more likely to report one or more symptoms, except for anxiety/depression and sleep disturbances. Fatigue and loss of concentration were evidently more common in cases among teenagers (risk difference: 15%; 95% CI: 7-22% and 15%; 95% CI: 7-23%, respectively). At the second follow-up, close to a third of Long COVID cases had resolved but some participants had developed new persistent symptoms. Symptoms of Long COVID in children are common and impact their quality of life. The importance of further unraveling the pathophysiology of acute and long-term symptoms following SARS-CoV-2 infection in children is vital as well as potential preventive measures.

Association Between Birth Weight Z-Score and Blood Pressure in 9- to 10-Year-Old Icelandic Children

Association Between Birth Weight Z-Score and Blood Pressure in 9- to 10-Year-Old Icelandic Children

Letter-sound knowledge in Icelandic children at the age 6 years-old

The aim of this study was to examine letter-sound knowledge when children start at school in Iceland. 392 children aged 5–6 years completed assessments of letter-sound knowledge, i.e., the names and sounds of uppercase and lowercase letters of the Icelandic alphabet (uppercase letter-name; uppercase letter-sound; lowercase letter-name; lowercase letter-sound). Whether the child had broken the reading code (could read words) was also recorded. The results revealed no significant difference between girls and boys in the four factors (letter name, letter sound). The results indicated that 56.9 % of the children had broken the reading code when they started school. 58.2 % of the girls and 55.6 % of the boys, not significant difference between the genders. There was a significant difference between the group which had broken the reading code and the group which have not in all the four factors. There was also a high significant correlation between all 4 variables from 0.915 between uppercase letter and lowercase sound to 0.963 between uppercase sounds and uppercase letter.Based on these data, it seems reasonable to advocate learning letter-sound correspondences early in the first year of school to form the best possible basis for breaking the reading code and further reading development.

Gapassipi

Gapassipi

The development of self-perception of ability in Icelandic children with and without specific learning difficulties

The development of self-perception of ability in Icelandic children with and without specific learning difficulties

Flames of Time:

The manuscript as narrator in Icelandic children’s novel Bál tímans (2022) belongs to a literary tradition of sentient object narrators who document the domestic spaces in which they circulate. Bál tímans shifts the reader’s focus to normally invisible manuscript owners and users, including women and children, bringing attention to disparities in access created through archive-building activities. In domestic settings, Möðruvallabók is accessible to a broad segment of the Icelandic population through practices of social reading, women’s book ownership, and home education. In the archive, human-manuscript interactions are restricted to a narrow and initially male-only elite. While tensions between preservation and access are resolved when the codex is exhibited in a museum space where it can share its stories with a wider audience, Bál tímans examines what can be lost by bringing cultural objects into archival spaces.

Musculoskeletal pain and its effect on daily activity and behaviour in Icelandic children and youths with juvenile idiopathic arthritis: a cross-sectional case-control study

BackgroundJuvenile idiopathic arthritis is characterised by recurring episodes of acute inflammation, with joint swelling in one or more joints, often accompanied by pain. These episodes can now be controlled better than in the past because of a new category of medications. However, despite more stable disease activity, pain may continue to cause problems in the children with juvenile idiopathic arthritis and can reduce their performance of routine physical activities and participation in social or school activities.AimTo evaluate the prevalence of pain, pain intensity, pain behaviour, and pain interference in Icelandic children with juvenile idiopathic arthritis compared with healthy peers.MethodsA cross-sectional, case-control study including 8-18 years old children; 28 with juvenile idiopathic arthritis and 36 in a control group. The children answered questions on pain experienced during the last 7 days, painful areas of the body and pain frequency. They completed short form versions of the Patient-Reported Outcome Measurement Information System (PROMIS) questionnaires on pain intensity, pain behaviour, and pain interference.ResultsSignificantly more children with juvenile idiopathic arthritis had pain compared with the control group (p = 0.02). Children with JIA also had a greater number of painful body areas (p = 0.03), more pain intensity (p = 0.009), and showed more pain behaviour (p = 0.006), and pain interference (p = 0.002). Children with juvenile idiopathic arthritis who had pain, experienced more pain interference (p = 0.023) than their peers who had pain. However, the groups did not differ in terms of pain intensity (p = 0.102) and pain behaviour (p = 0.058).ConclusionThe research results indicate that pain experience was different between children with juvenile idiopathic arthritis and the control group. The results suggest that further research of the role of pain management on functional outcomes in children with juvenile idiopathic arthritis is needed.

SARS-CoV-2 Infections in Icelandic Children: Close Follow-up of All Confirmed Cases in a Nationwide Study.

Introduction:Children are less likely to acquire SARS-CoV-2 infections than adults and when infected, usually have milder disease. True infection and complication rates are, however, difficult to ascertain. In Iceland, a strict test, trace and isolate policy was maintained from the start of the pandemic and offers more accurate information of the number of truly infected children in a nationwide study.Material and methods:All children with positive PCR for SARS-CoV-2 infections from February 28, 2020 to August 31, 2021 were followed up through telephone consultations for at least 14 days and their symptoms were registered. Symptom severity and duration were categorized based on age groups and the source of infection was registered.Results:A total of 1749 children were infected with SARS-CoV-2 in 3 waves of infections. All waves had similar disease severity whereas the incidence was 5-fold higher in the third wave (3.5 vs. 0.73/1000 children/month). No children had severe symptoms, 81 (4.6%) had moderate symptoms, 1287 (73.9%) had mild and 374 (21.5%) were asymptomatic. Symptoms from upper (n = 839, 48%) and lower respiratory tract (n = 744, 43%) were most common. Median duration of symptoms was 5 days and adolescents had a higher risk of prolonged duration [OR:1.84 (1.39–2.43)]. Nineteen (1.1%) children needed medical attention, but no child was hospitalized. The source of infection was a household member in 65% of cases.Discussion:During the first 3 waves of the pandemic, SARS-CoV-2 infections in Icelandic children were mild and none were hospitalized. The most common symptoms were respiratory symptoms followed by fever, headache and tiredness. This study helps shed light on true complication rates of children with confirmed SARS-CoV-2 infection.

Dyadic Reports Using the Parental Support after Child Sexual Abuse Measure: Psychometrics and Associations with Post-Traumatic Stress Disorder Symptoms.

This study assessed the psychometric properties of a new measure, the Parental Support after Child Sexual Abuse (PSCSA) survey, and tested the association between parents' and children's parental support reports and children's post-traumatic stress disorder (PTSD) symptoms. A total of 99 Icelandic children (86.5% girls, 6-18 years old, M = 13.9 years) starting therapy for child sexual abuse (CSA) and 98 non-offending parents (90.6% mothers, 23-58 years old, M = 41.2 years) participated in the study. Participants completed questionnaires on parental support (PSCSA) and children's PTSD symptom severity (University of California at Los Angeles Post-Traumatic Stress Disorder Reaction Index for the Diagnostic and Statistical Manual of Mental Disorders, fourth edition). A total of 18 items were considered for the PSCSA parent version and nine for the PSCSA child version. Five reliable factors emerged for the parent version (Emotional support, Instrumental support, Self-blame, Child blame and Disbelief) using 16 items and one factor (combined Emotional and instrumental support) emerged for the child's version using eight items. On average, ratings for both Emotional and Instrumental support were higher for parents than their children. Emotional support reported by both parents and children was negatively associated with PTSD symptom severity. The PSCSA survey is a promising dyadic measure for future research and clinical use in children's advocacy centres.

P137 Deep learning enables accurate automatic sleep stage classification in a clinical paediatric population

Abstract Introduction Sleep disorders are widespread in children and associated with a myriad of detrimental health sequelae. Accurate identification of sleep stages is crucial in diagnosing various sleep disorders; however, manual sleep stage scoring can be subjective, laborious, and costly. To tackle these shortcomings, we aimed to develop an accurate deep learning-based approach to automate sleep staging in a paediatric cohort. Methods A clinical dataset (n=115, 35% girls) containing overnight polysomnographic recordings of 10–13-year-old Icelandic children from the EuroPrevall-iFAAM study was utilised to develop a combined convolutional and long short-term memory neural network architecture. A three-channel input comprising electroencephalography (F4-M1), electrooculography (E1-M2), and chin electromyography was used to train and evaluate the model to classify sleep into five stages (wake/N1/N2/N3/REM) using 10-fold cross-validation. Further, inter-rater reliabilities between two manual scorers and the automatic method were investigated in a subset (n=10) of the population. Results The automatic classification model achieved an accuracy of 84.5% (Cohen’s kappa κ=0.78: substantial agreement with manual scorings). Inter-rater reliability attained between two manual scorers was 84.6% (κ=0.78), and the automatic method achieved similar concordances with them, 83.4% (κ=0.76) and 82.7% (κ=0.75). Discussion The developed model achieved high accuracy and compared favourably to previously published state-of-the-art methods (performance range: 74.8%-84.3%). Inter-rater reliabilities were on par with the consensus between manual scorers and even better than among international sleep centres (commonly 0.57–0.63 as per literature). Therefore, incorporating the proposed methodology in clinical practice could be highly beneficial as it enables fast, cost-effective, and accurate sleep classification in children.

Decreasing death rates and causes of death in Icelandic children-A longitudinal analysis.

Global death rate in children has been declining during the last decades worldwide, especially in high income countries. This has been attributed to several factors, including improved prenatal and perinatal care, immunisations, infection management as well as progress in diagnosis and treatment of most diseases. However, there is certainly room for further progress. The aim of the current study was to describe the changes in death rates and causes of death in Iceland, a high-income country during almost half a century. The Causes of Death Register at The Directorate of Health was used to identify all children under the age of 18 years in Iceland that died during the study period from January 1st, 1971 until December 31st, 2018. Using Icelandic national identification numbers, individuals could be identified for further information. Hospital records, laboratory results and post-mortem diagnosis could be accessed if cause of death was unclear. Results showed a distinct decrease in death rates in children during the study period that was continuous over the whole period. This was established for almost all causes of death and in all age groups. This reduction was primarily attributed to a decrease in fatal accidents and fewer deaths due to infections, perinatal or congenital disease as well as malignancies, the reduction in death rates from other causes was less distinct. Childhood suicide rates remained constant. Our results are encouraging for further prevention of childhood deaths. In addition, our results emphasise the need to improve measures to detect and treat mental and behavioural disorders leading to childhood suicide.

Burden of rotavirus disease in young children in Iceland – Time to vaccinate?

BackgroundAcute gastroenteritis poses a significant burden on young children, families, health care facilities and societies. Rotavirus is the most common pathogen, but rotavirus infections are vaccine preventable. Information on the epidemiology of gastroenteritis in Icelandic children has until now not been available and rotavirus vaccination is currently not offered to Icelandic infants. The objective of this study was to assess the burden of rotavirus acute gastroenteritis in young children in Iceland and determine the potential benefit of adding rotavirus vaccine to the Icelandic childhood immunization schedule. MethodsFor a two-year period, children < 6 years old attending a children’s emergency department for acute gastroenteritis were recruited at the Children’s Hospital in Reykjavík, Iceland. Demographic information and Vesikari scores were registered. Stool samples were analyzed for pathogens. Duration of symptoms, treatment given, and secondary household infections were among the collected information. Annual cost of the infections in young children was estimated based on health care expenditures and lost days of parental work. Results325 children were included in the study, 75% of which were ≤ 24 months old. A pathogen was identified in 80% of cases, of which rotavirus was identified in 54%. Rotavirus caused a more severe disease than other pathogens, more often leading to fluid treatment in the emergency department and admissions. Median duration of rotavirus-illness was six days and caused a median of four days lost from work by parents. The estimated annual cost of rotavirus acute gastroenteritis was €2.9 million. ConclusionsRotavirus causes significant disease burden in young children. Although rarely life-threatening in high income countries, the costs for society are substantial. The inclusion of rotavirus vaccine in the national immunization schedule will reduce the disease burden and would be cost-saving in Iceland.

Icelandic Children's Acquisition of Consonants and Consonant Clusters.

Purpose This study investigated Icelandic-speaking children's acquisition of singleton consonants and consonant clusters. Method Participants were 437 typically developing children aged 2;6-7;11 (years;months) acquiring Icelandic as their first language. Single-word speech samples of the 47 single consonants and 45 consonant clusters were collected using Málhljóðapróf ÞM (ÞM's Test of Speech Sound Disorders). Results Percentage of consonants correct for children aged 2;6-2;11 was 73.12 (SD = 13.33) and increased to 98.55 (SD = 3.24) for children aged 7;0-7;11. Overall, singleton consonants were more likely to be accurate than consonant clusters. The earliest consonants to be acquired were /m, n, p, t, j, h/ in word-initial position and /f, l/ within words. The last consonants to be acquired were /x, r, r̥, s, θ, n̥/, and consonant clusters in word-initial /sv-, stl-, str-, skr-, θr-/, within-word /-ðr-, -tl-/, and word-final /-kl̥, -xt/ contexts. Within-word phonemes were more often accurate than those in word-initial position, with word-final position the least accurate. Accuracy of production was significantly related to increasing age, but not sex. Conclusions This is the first comprehensive study of consonants and consonant cluster acquisition by typically developing Icelandic-speaking children. The findings align with trends for other Germanic languages; however, there are notable language-specific differences of clinical importance.

Language acquisition in the digital age: L2 English input effects on children’s L1 Icelandic

This article reviews prominent research on non-English-speaking children’s extramural acquisition of English through digital media, and examines the understudied scenario of possible effects of such second language (L2) English input on domestically dominant but globally small first languages (L1s), with Icelandic as the test case. We outline the main results of the children’s part of the Modeling the Linguistic Consequences of Digital Language Contact (MoLiCoDiLaCo) research project, which targeted 724 3–12-year-old Icelandic-speaking children. The focus is on English input and its relationship to the children’s Icelandic/English vocabulary and Icelandic grammar. Although a causal relationship between digital English and reduced/incompletely acquired Icelandic is often assumed in public discourse, our results do not show large-scale effects of L2 digital English on L1 Icelandic. English still seems to be a relatively small part of Icelandic children’s language environment, and although we find some indications of contact induced/reinforced language change, i.e. in the standard use of the subjunctive, as well as reduced MLU/NDW (mean length of utterance/number of different words) in the Icelandic language samples, we do not find pervasive effects of L2 English on L1 Icelandic. On the other hand, the results show contextual L2 learning of English by Icelandic-speaking children through mostly receptive digital input. Thus, the results imply that English digital language input contributes mainly to L2 English skills without adversely affecting L1 Icelandic.

From Books to the Information Superhighway: Young People's Reading Habits and Internet Use in Iceland

In mid January 1997 a telephone survey was canied out on a random sample of 800 Icelandic children ages 10, 12,14 and 16 years of age, 100 girls and 100 boys in each age group. The response rate was 88.5%. The purpose was to examine some factors related to publications for children in the Icelandic language, including books as Christmas gifts, reading habits and Internet use. The majority of children in all age groups received books as Christmas gifts, mostly new publications. Reading is a common pastime among children, mostly among the younger groups. Girls read more than boys in all age groups. CDs are more common than bootes as presents among the 14- and 16-year-olds, but computer games are rare, particulary among girls. The Internet is used more by boys than girls in all age groups but use patterns vary as well as choice of access points.&#x0D; The author emphasizes the need to use the Internet systematically as a tool in cultural preservation.

Viðhorf foreldra og opinber leikskólastefna

Markmið rannsóknarinnar var að varpa ljósi á mat foreldra á gæðum leikskólastarfs í samhengi við menningarbundin viðhorf sem birtast í opinberri stefnu leikskóla. Jafnframt að skoða hvort marka mætti breytingar á viðhorfum foreldra á einum áratug. Einstaklings- og hópaviðtöl voru tekin við foreldra barna sem voru að ljúka leikskólagöngu sinni í þremur leikskólum í Reykjavík. Tíu árum áður höfðu sambærileg viðtöl verið tekin við foreldra í þeim sömu leikskólum. Viðhorf og gildi foreldranna eins og þau birtust í umræðum og frásögnum þeirra voru skoðuð í félags- og menningarlegu samhengi (Rogoff, 2003). Niðurstöðurnar sýna að viðhorf foreldranna til gæða leikskólastarfs eru í samræmi við opinbera stefnu leikskóla hér á landi og annars staðar á Norðurlöndum. Þeir lögðu fyrst og fremst áherslu á að börnin lærðu samskipti og félagslega hæfni í leikskólanum. Leikur, óformlegt nám, umhyggja og persónuleg hæfni voru þeir þættir sem foreldrarnir töldu mikilvæga. Hugmyndafræði norrænnar leikskólahefðar hefur átt undir högg að sækja á undanförnum áratugum og hefur sums staðar mátt víkja fyrir bóknámsreki og áherslum á mælanlegan árangur. Þau sjónarmið virtust ekki hafa haft áhrif á viðhorf foreldranna.

The effect of transcription skills, text generation, and self-regulation on Icelandic children’s text writing

The main purpose of this longitudinal research was to study the effects of transcription skills, text generation skills and self-regulation on Icelandic children’s writing, compare their effects on two different text genres and see if it changes with age, from second to fourth grade. Eighty-seven Icelandic children were followed up from first through fourth grade. In first grade the children’s transcription skills, text generation skills and self-regulation were evaluated. In second and fourth grade the children composed two written texts, a narrative and an information text. The dimensions of text quality analysed included text length, vocabulary, cohesion, structure and spelling. A multiple regression model was used to assess the importance of the three foundational skills for children’s writing in both grades and for both text genres. Transcription skills strongly predicted spelling in both text genres and in both grades but had limited effect on measures of text quality. Text generation skills had limited effect on both spelling and text quality while self-regulation significantly affected more variables than did transcription skills and text generation skills. Finally, the results suggest that the effects of the three foundational skills develop in different ways in the two text genres, and that children can activate their text generation skills for narrative writing earlier than for information text writing.

Vitamin D status of Icelandic children and youngsters: Longitudinal study

Vitamin D plays a key role for children's growth and physical developement, not only by promoting bone health but also by its influence on extraskeletal systems. The Icelandic Directorate of Health recommends a vitamin D concentration in blood of at least 50 nmol/l. The object of this study was to evaluate the vitamin D status of Icelandic children and youngsters at four different ages, and furthermore to evaluate changes in vitamin D concentrations over time and connection to parathyroid hormone status (S-PTH). The subjects were students from six elemen-tary schools in Reykjavík, born in 1999. Blood tests were taken four times, in 2006, 2008, 2015 og 2017. Some of the subjects took part in all four tests, but more students joined in 2015 and 2017. In all the tests, around 60% of the subjects had lower vitamin D concentrations than recommended by The Icelandic Directorate of Health. Only 13% met the recommended criteria of a concentration over 50 nmol/l in repeated tests and 38.9% of the subjects had lower concentrations than recommended in at least two tests. There was no significant difference between sexes except that 17 year old girls had significantly higher Vitamin D concentrations than boys (p=0.04). S-PTH was negatively correlated to vitamin D concentrations at ages 7, 15 and 17 but there was not a significant correlation at age 9. S-PTH values were lowest at age 7 and then increased with age. The majority of Icelandic children and youngsters have vitamin D concentrations under the values recommended by The Icelandic Directorate of Health. In many cases, the concentrations are repeatedly too low. It is clear that there is a need for increased vitamin D intake within this group if the goal regarding recommended concentrations is to be achieved. However, the influence of vitamin D deficiency on public health is not fully known.