Multivariate Analysis Of Covariance Research Articles

Associations between skating mechanical capabilities and off-ice physical abilities of highly trained teenage ice hockey players.

This study examines the associations between force and velocity characteristics of forward skating and off-ice speed, agility, and power of highly trained teenage ice hockey players. Players attending the Quebec ice hockey federation's off-season evaluation camp were invited to participate in this study. Final sample consists of 107 highly trained teenage ice hockey players (Males: n=38; 13.83±0.38years; Females: n=69: 14.75±0.90years). Individual force-velocity profiles (F-V) were determined during a 44m skating sprint. Off-ice speed, agility, and power were measured using 30m sprint, 5-10-5 agility, and standing long jump. Associations between F-V mechanical capabilities and off-ice indicators were analyzed with correlational analyses and multivariate analysis of covariance (MANCOVA). Results of pooled data indicate that the three off-ice measures had moderate associations with F0 and V0 and large associations with Pmax. Associations with Rfmax, Drf, and Sfv were moderate to small. F0 had stronger associations with off-ice performance in female players while V0 was more important with male players. MANCOVA identified 5-10-5 times as the better predictor for F0 while 30m sprints times better predicted V0. To maximize physical attributes of skating ability, practitioners are encouraged to focus on a general physical preparation for highly trained teenage players. Prioritizing types of exercises that use change of direction or acceleration and linear speed should have distinct effects on F0 and V0 on the ice.

The relationship between sphingomyelin and ceramide levels and soft neurological signs in ADHD.

Attention deficit hyperactivity disorder (ADHD), characterized by attention deficit, hyperactivity, and impulsivity, has recently been associated with lipid metabolism. In particular, the roles of sphingomyelin, ceramide, andgalactosylceramidase in the pathophysiology of ADHD are being investigated. This study aims to explore the relationship between sphingolipid metabolism markers and soft neurological signs (SNS) in children diagnosed with ADHD who are not undergoing medication treatment. A cross-sectional analysis was conducted on 41 children and adolescents aged 7-12 years diagnosed with ADHD and 39 neurotypically developing controls. Plasma levels of ceramide, sphingomyelin, and galactosylceramidase were measuredusing Enzyme-Linked Immunosorbent Assay (ELISA). SNS were assessed using the Physical and Neurological Examination for Soft Signs (PANESS). Statistical analyses included Student's t-tests, Mann-Whitney U tests, and Multivariate Analysis ofCovariance (MANCOVA), along with logistic regression analysis. Plasma levels of ceramide and sphingomyelin in children with ADHD showed significant differences compared to the neurotypically developing control group; however, there were no significant differences in galactosylceramidase levels between the two groups. Positive correlations were found between plasma levels of ceramide and sphingomyelin and the PANESS subscales F1 (Total Gait and Station) and F3 (Total Dysrhythmia). Additionally, logistic regression analysis indicated that high ceramide levels were positively associated with ADHD. This study underscores a significant association between alterations in sphingolipid metabolism (specifically increased levels of ceramide and sphingomyelin) and the presence of SNS in children with ADHD. These findings elucidate the potential role of sphingolipid metabolism in the pathophysiology of ADHD and provide suggestions for future therapeutic research targeting sphingolipid metabolism in the treatment of ADHD.

The Efficacy of Cognitive Behavioral Therapy on Mental Health, Self-esteem and Emotion Regulation of Medical Students with Imposter Syndrome

Background: Medical students often experience self-doubt due to the demanding nature of their coursework and numerous assignments, which may indicate Imposter Syndrome (IS). Objectives: This study aimed to evaluate the effectiveness of cognitive behavioral therapy (CBT) in improving mental health, self-esteem, and emotional regulation among medical students dealing with IS. Methods: A semi-experimental design was used, incorporating a pre-test-post-test approach with a control group. The statistical sample included medical students from Tarbiat Modares University in 2023. A total of 36 students were selected through purposeful sampling and randomly assigned to either the experimental group (n = 18) or the control group (n = 18). Data collection tools included questionnaires assessing IS, mental health, self-esteem, and emotion regulation. The experimental group received eight 90-minute CBT sessions based on the approach by Egan and Shafran (2017), while the control group received no intervention. Data were analyzed using a multivariate analysis of covariance with SPSS24 software. Results: The results showed that CBT significantly reduced expressive suppression (F = 78.04, η² = 0.72) and increased mental health (F = 37.73, η² = 0.56), self-esteem (F = 54.76, η² = 0.64), and cognitive reappraisal (F = 35.65, η² = 0.55) among students with IS (P < 0.001). Conclusions: The findings suggest that CBT is an effective intervention for improving the psychological well-being of medical students experiencing IS. The significant improvements in mental health, self-esteem, and emotional regulation underscore CBT's potential as a valuable tool for this population.

Alterations in Gray Matter Structural Networks in Amnestic Mild Cognitive Impairment: A Source-Based Morphometry Study.

Amnestic mild cognitive impairment (aMCI), considered as the prodromal stage of Alzheimer's disease, is characterized by isolated memory impairment and cerebral gray matter volume (GMV) alterations. Previous structural MRI studies in aMCI have been mainly based on univariate statistics using voxel-based morphometry. We investigated structural network differences between aMCI patients and cognitively normal older adults by using source-based morphometry, a multivariate approach that considers the relationship between voxels of various parts of the brain. Ninety-one aMCI patients and 80 cognitively normal controls underwent structural MRI and neuropsychological assessment. Spatially independent components (ICs) that covaried between participants were estimated and a multivariate analysis of covariance was performed with ICs as dependent variables, diagnosis as independent variable, and age, sex, education level, and site as covariates. aMCI patients exhibited reduced GMV in the precentral, temporo-cerebellar, frontal, and temporal network, and increased GMV in the left superior parietal network compared to controls (pFWER < 0.05, Holm-Bonferroni correction). Moreover, we found that diagnosis, more specifically aMCI, moderated the positive relationship between occipital network and Mini-Mental State Examination scores (pFWER < 0.05, Holm-Bonferroni correction). Our results showed GMV alterations in temporo-fronto-parieto-cerebellar networks in aMCI, extending previous results obtained with univariate approaches.

Association Study Between DRD2, DRD3 Genetic Polymorphisms and Adverse Reactions in Chinese Patients on Amisulpride Treatment.

To determine if the cardiac function and "endocrinium" of Chinese patients are associated with dopamine D2 (DRD2) (rs6276) and DRD3 (rs6280, rs963468) genetic polymorphisms when treated with amisulpride. This study enrolled 148 patients with schizophrenia who took amisulpride orally for 8 weeks. DRD2 (rs6276) and DRD3 (rs6280, rs963468) genetic polymorphisms were detected with TaqMan-MGB allelic discrimination. Analysis by multivariate covariance analysis (MANCOVA) showed that after adjusting for age, gender, and the baseline level, the increase in the level of aspartate aminotransferase (AST) and creatine kinase (CK) in the rs6276 AG group was higher than that in the AA and GG groups. Similarly, the changed estradiol (E2) level in rs6276 GG and rs963468 GG groups was higher than that in the other two groups. Adjusting for covariates, the increased triglyceride (TG) level in rs6276 GG and rs963468 GG groups was the highest among their different genotype groups. The increase in the level of "AST" in the rs6280 TT group was higher than that in the CC and CT groups upon adjusting for covariates. Similarly, MANCOVA showed that the increase in the level of "CK" in the rs6280 CT group was higher than that in the CC and CT groups. Besides, the increased level of "PRL" in the rs6280 CC group and rs963468 GG group was higher than that in their other two genotypes groups. DRD2 (rs6276) and DRD3 (rs6280, rs963468) polymorphisms can affect amisulpride tolerability since they are associated with the observed adverse reactions, including cardiac dysfunction and endocrine disorders in Chinese patients with schizophrenia.

Toxoplasma gondii IgG serointensity and cognitive function in bipolar disorder

BackgroundAlongside affective episodes, cognitive dysfunction is a core symptom of bipolar disorder. The intracellular parasite T. gondii has been positively associated with both, the diagnosis of bipolar disorder and poorer cognitive performance, across diagnostic boundaries. This study aims to investigate the association between T. gondii seropositivity, serointensity, and cognitive function in an euthymic sample of bipolar disorder.MethodsA total of 76 participants with bipolar disorder in remission were tested for T. gondii-specific IgG and IgM antibodies and for cognitive performance using neuropsychological test battery. Cognitive parameters were categorized into three cognitive domains (attention and processing speed, verbal memory, and executive function). Statistical analysis of associations between continuous indicators of cognitive function as dependent variables in relationship to T. gondii, included multivariate analyses of co-variance for seropositivity, and partial correlations with IgG serointensity in IgG seropositives. All analyses were controlled for age and premorbid IQ.ResultsIn seropositives (n = 27), verbal memory showed significant inverse partial correlations with IgG antibody levels (short delay free recall (r=–0.539, p = 0.005), long delay free recall (r=–0.423, p = 0.035), and immediate recall sum trial 1–5 (r=–0.399, p = 0.048)). Cognitive function did not differ between IgG seropositive and seronegative individuals in any of the cognitive domains (F (3,70) = 0.327, p = 0.806, n = 76). IgM positives (n = 7) were too few to be analyzed.ConclusionsThis investigation is the first to show an association between T. gondii IgG serointensity and memory function in a well-diagnosed bipolar disorder sample. It adds to the existing literature on associations between latent T. gondii infection and cognition in bipolar disorder, while further research is needed to confirm and expand our findings, eliminate potential sources of bias, and establish cause-effect relationships.

U.S. Secondary Students’ Source-Based Argument Writing in History

Developing students’ source-based argument writing skills is a vital educational goal for the 21st-century information society. Consequently, researchers and educators continually seek ways to understand and improve students’ capacities for advancing arguments and synthesizing multiple documents, texts, or sources in a range of subject areas in secondary schools. This study examined differences between middle and high school students’ argument essays (N = 207) in multiple dimensions of source-based argument writing in history, the dimensions writing in history, and the relations of identified dimensions to overall writing quality. Using multivariate analysis of covariance, middle and high school students’ writing significantly varied in areas of writing related to language use, the presentation of ideas, and evidence use. Their writing varied less so for skills related to historical thinking, indicating a lack of development in these skills across secondary school. Findings from confirmatory factor analysis and structural equation modeling showed a bifactor model with a general factor and 4 specific factors—Presentation of Ideas, Evidence Use, Language Use, and Historical Thinking—best represented writing in this genre, with the general factor strongly predicting holistic writing scores. Implications for both research and educational practice are discussed, including the importance of attending to developmental variation in discrete writing skills.

Risk and Protective Factors in Dancers Exposed to Trauma.

This study examined risk and protective factors in dancers with/without posttraumatic stress disorder (PTSD) and with/without trauma exposure. Exposure to traumatic events and developing PTSD can compromise daily functioning and performance ability. Despite exposure many dancers adapt, whereas others suffer psychopathology such as depression, anxiety, PTSD, and difficulties regulating emotions. Two hundred ninety two pre-professional/professional dancers provided informed consent (IRB approved) and completed 8 self-report measures. A subsample (66%) exposed to a significant traumatic event was evaluated for PTSD. Multivariate analyses of covariance (MANCOVA) were conducted to compare dancers with/without PTSD and with/without trauma exposure. A logistic regression analysis determined predictors of PTSD. The MANCOVAs indicated that dancers exposed to trauma (66%) and who had PTSD (32%) had significantly more difficulty regulating emotions, engaged more emotion-oriented coping under stress, and had increased depression, trait anxiety, and cumulative trauma. In these group comparison analyses there were non-significant differences regarding flow experiences and task- and avoidance-oriented coping strategies. In the logistic regression analysis childhood physical and sexual abuse, childhood emotional neglect, mental illness within the family, and difficulty disclosing abuse experiences were predictors of PTSD. In the total sample 21% had PTSD. This study identified types of abuse/trauma, emotion regulation/coping, and psychopathology associated with PTSD in dancers exposed to trauma (66%) and with PTSD (32%). In the total sample 21% had PTSD. Regardless of exposure to trauma or PTSD, the non-significant findings indicated similarities for dancers for global and autotelic flow experiences and task- and avoidance-oriented coping strategies. These positive factors may mitigate trauma-related symptoms. It is recommended that dancers, educators, and clinicians understand the effects of trauma exposure and promote the development of effective coping strategies, emotion regulation, and flow states which may diminish the negative effects of PTSD.

The Effectiveness of Metacognitive Therapy on Depression, Emotion Regulation, and Self-concept in Students with Social Anxiety Disorder: A Quasi-Experimental Study

Background: Students with social anxiety disorder (SAD) face unique challenges that can significantly impact their academic performance, social interactions, and overall well-being. Objectives: This study aimed to explore the impact of metacognitive therapy (MCT) on depression, emotion regulation, and self-concept among students diagnosed with SAD. Methods: The study employed a quasi-experimental research design with a pre-test-post-test format and a control group. The statistical population consisted of students diagnosed with SAD at the University of Tehran in 2022. A total of 36 students with SAD were selected for the research sample through purposive sampling and were divided into experimental (n = 18) and control (n = 18) groups. The experimental group participated in ten 90-minute sessions of MCT, while the control group did not receive any intervention. Data collection involved administering the Liebowitz Social Anxiety Scale, Beck Depression Inventory, Emotion Regulation Questionnaire, and Beck Self-concept Test. The collected data were analyzed using multivariate analysis of covariance (MANCOVA) in SPSS-24. Results: The results indicated that Metacognitive Therapy (MCT) significantly decreased depression (F = 50.65, P = 0.001, η² = 0.63) and significantly increased cognitive reappraisal (F = 61.81, P = 0.001, η² = 0.67), expressive suppression (F = 34.72, P = 0.001, η² = 0.54), and self-concept (F = 48.53, P = 0.001, η² = 0.62) in students with SAD. Conclusions: The findings of this study enhance our understanding of the therapeutic benefits of MCT for students struggling with SAD. By addressing critical psychological areas such as depression, emotion regulation, and self-concept, MCT shows promise as a valuable intervention for improving the well-being and functioning of students dealing with SAD.

Subjective healthy aging indicators in a the Mediterranean and Latin American context. A comparison by gender and age in older adults of lifelong educational programs

ABSTRACT The aim of this research is to compare a series of subjective indicators of healthy aging. We analyzed two samples of people 60 years or older enrolled in university courses in two public universities, the National University (Costa Rica, N = 206) and the University of Valencia (Spain, N = 857). The subjective indicators of successful aging analyzed were social support (social network and functional social support), perceived health, spirituality, and subjective well-being (life satisfaction and psychological well-being), all variables conditioned by country, age, and gender. Analysis of Covariance (ANCOVA) or Multivariate Analysis of Covariance (MANCOVA) was estimated, depending on the number of dependent variables analyzed. Overall, relatively high subjective indicators of healthy aging have been achieved in both samples. We found group differences in both samples by comparing age and gender, but not by country in these healthy aging indicators, suggesting invariant comparison evidence in both cultures compared. This study found that the subjective successful aging indicators analyzed in both cultures were similar. These findings are discussed within the cross-cultural emphasis and successful aging models.

Acute Effects of Exercise Breaks on Attention and Working Memory During a University Lecture: A Group-Randomized Controlled Trial

Objective: This study investigated the acute effects of exercise breaks on attention and working memory during lectures among third-year physical therapy students.Material and Methods: In total 65 participants were randomly assigned to exercise breaks (N=22), game breaks (N=21), and no breaks (N=22). The lecture was divided into two parts. Participants watched each part of a 50-minute computer-based video lecture. The present study examined the heart rate, perception, attention, and working memory impact of 5-minute breaks. The exercise breaks group performed a series of callisthenic exercises, the game breaks group played a computer game, and the no breaks group watched the entire lecture continuously without breaks. The differences in means for variables among each group were compared using a 3x2 repeated measure Multivariate Analysis of Covariance (MANCOVA).Results: Exercise breaks during lectures facilitated a positive impact on the modulation of shifting working memory in comparison to game breaks and non-exercise breaks (p-value&lt;0.05). Significant pre-test to post-test in shifting working memory improvements were found in the exercise breaks group (F(2,62)=4.266, p-value=0.018). The variation in mean shifting working memory was 12.1 percent of the effect (np2=0.121). This improvement aligned with better learning results, especially when assessed for immediate outcomes. Conclusion: Exercise breaks during academic lectures demonstrated a statistically significant impact on shifting working memory. Consequently, further investigations are required to explore the enduring impacts of exercise breaks on cognitive functions in the long term. Additionally, determining the optimal duration of exercise breaks and lecture lengths is essential for guiding university teaching practices.

Snail shell shape, force of attachment, and metabolic rate together cope with the intertidal challenge

Inhabitants of rocky intertidal shores, including gastropods, require specific adaptations to cope with numerous challenges that vary across the intertidal levels. We collected Stramonita biserialis snails from upper (wave-protected and intense predation) and lower (wave-exposed and low predation) intertidal sites to compare the following traits: shell skeleton (ventral and abaxial lateral views of shell shape, thickness, and mass), foot size, energy metabolism, and attachment strength to determine whether the trait values of snails from each zone fit the environmental challenges they face. We used a Principal Component Analysis to reduce the dimensionality of the data. Multivariate Analysis of Covariance (MANCOVA) for comparing characteristics between the two intertidal zones, and Partial Least Squares (PLS) analyses for testing the integration of overall snail characteristics. The traits of the snails of the two intertidal sites matched with the adaptations expected to allow them to cope with their contrasting challenges. The snails from the lower intertidal had more streamlined shells (which reduces drag forces) and a larger aperture and foot extension (which increase the strength of their attachment to the substrate) compared to snails from the upper sites. Snails from the lower intertidal also had a high mass-specific metabolism and soft body proportion, indicating that these snails from the wave-exposed sites have an energetically active musculature that matches their strong substrate attachment. The thin shell walls of the snails of the lower intertidal match the relatively low predatory pressure there.

Quality of life and depression in patients with Parkinson's disease: effectiveness of group cognitive-behavioral therapy: a randomized controlled study.

Group cognitive-behavioral therapy has demonstrated its effectiveness in treating various psychological disorders. Nevertheless, there is insufficient evidence supporting its application in enhancing both the quality of life and depression among Parkinson's patients. Consequently, this study was undertaken to examine the efficacy of group cognitive-behavioral therapy in ameliorating depression symptoms and enhancing the quality of life in individuals afflicted with Parkinson's disease. A randomized clinical trial with pre-test and post-test measurements, including a control group, was conducted. The sample consisted of individuals referred to Roozbeh Hospital in Tehran with Parkinson's disease in 2023. Ninety participants were selected using convenience sampling and randomly assigned to either an experimental or a control group, with 45 participants in each. The experimental group received a three-month cognitive-behavioral therapy intervention consisting of 12 sessions of 90 min. Pre-test and post-test measures included the Beck Depression Questionnaire and the World Health Organization Quality of Life Questionnaire. Data analysis was performed using multivariate analysis of covariance (MANCOVA) in SPSS-25. The results revealed a significant difference between the experimental and control groups in terms of depression and quality of life. The cognitive-behavioral therapy intervention significantly reduced depression and significantly improved the quality of life in individuals with Parkinson's disease (P≤0.01). Group cognitive-behavioral therapy can be an effective approach for reducing depression and improving the quality of life in individuals with Parkinson's disease. Therefore, therapists and healthcare providers can utilize cognitive-behavioral therapy to enhance the well-being of individuals with Parkinson's disease.

Immediate post-concussion assessment and cognitive testing Pediatric (ImPACT Pediatric) change scores and factors associated with performance in patients aged 5-9 years following concussion: Preliminary findings

Background Computerized neurocognitive testing is one component of a multidomain assessment of concussion. However, the use of computerized neurocognitive testing has been limited to patients aged 11 years and up, leaving clinicians with few options to evaluate younger children. Purpose To examine the change in Immediate Post-concussion Assessment and Cognitive Testing Pediatric (ImPACT Pediatric) (ImPACT Applications, 2021) scores and factors associated with performance in children aged 5-9 years following a concussion. Methods Participants included 63 children (42% [n = 27] female) aged 5-9 (M = 7.5 ± 1.0) years within 30 (M = 8.5 ± 5.9) days of a concussion. All participants completed the ImPACT Pediatric at their initial visit and at medical clearance for their return to activity (RTA) visit. The ImPACT Pediatric test is a computerized neurocognitive battery that includes 5 tests that assess memory and visual processing speed. Multivariate and univariate analyses of variance and paired t-tests were used to compare ImPACT Pediatric scores from the initial visit to medical clearance. Multivariate and univariate analyses of covariance and multiple linear regression examined factors associated with ImPACT Pediatric performance. Results Participants demonstrated improved overall performance from the initial visit to the medical clearance visit (F(4, 59)=3.08, p = 0.02, Wilks’ Λ = 0.83, ηp 2=0.17), with significant improvement in Rapid Processing Speed (F(1, 62)=7.48, p < 0.01, ηp 2=0.11). When controlling for age, sex, history of ADHD, and days to clinic, the improvement in overall performance remained significant (F(4, 51)=2.99, p = 0.03, Wilks’ Λ = 0.81, ηp 2=0.19). Older age was significantly associated with the Rapid Processing composite score at the initial visit (F(4, 59)=5.9, p < 0.001, Adj. R2=0.25) and medical clearance visit (F(4, 59)=3.8, p = 0.008, Adj. R2=0.16), with older children associated with better performance at both time points (Initial visit: B = 8.17, p < 0.001; Medical Clearance: B = 3.62, p = 0.03). Conclusion Our main findings suggest that children aged 5-9 years improved significantly in Rapid Processing on the ImPACT Pediatric from the initial visit to medical clearance. However, no differences were found for the memory components of the ImPACT Pediatric. Older children also performed better on processing speed than younger children. The findings suggest that the processing speed components of ImPACT Pediatric are useful for monitoring improvements in neurocognitive functioning following concussion in children aged 5-9 years, but that age differences need to be considered when interpreting performance.

Social Support Among Adolescents Across Immigrant Generations: A Mixed-Methods Study

The present mixed methods study explored perceived differences in social support across three immigrant generations of early adolescents residing in Canada. A total of 960 first-generation ( n = 249, M age = 13.02, σ = .69, 54.2% girls), second-generation ( n = 327, M age = 12.88, σ = .69, 57.5% girls) and third-plus-generation ( n = 384, M age = 12.81, σ = .69, 57.3% girls) early adolescent immigrants completed the self-reported Child and Adolescent Social Support Scale, and 16 of them participated in individual interviews on social support. Multivariate analyses of covariance (MANCOVA), in which we controlled for sex, mother tongue, and socioeconomic status (SES), showed that second-generation early adolescents perceived significantly less social support from their mother, teachers, school personnel, and classmates compared to their first- and/or third-plus-generation counterparts. Our mixed methods analysis revealed that these second-generation youth perceived several barriers to social support, such as an unsatisfactory quality of their relationships with these sources, a negative attitude from these sources, their limited availability or involvement, and their ineffectiveness in providing certain types of support. These findings highlight the importance of better understanding the unique challenges facing second-generation early adolescents in order to provide social support adapted to their needs.

The Effect of Rivalry on Sport Performance

The motivation to outperform rivals can lead to sport innovation, creativity, and improved performance. Sport literature already affirms that rivalry leads to better team performance; however, empirical evidence to support the claim for individual performance is scarce. This study examines the effect of the Cristiano Ronaldo-Lionel Messi rivalry on their performances during their stay in Europe. We measured performance using non-subjective metrics such as number of goals, appearances, and assists. We also controlled for their years of professional experience as this is expected to be reflected in their performances. Data were analyzed using multivariate analysis of covariance. Empirical results confirmed the positive effect of rivalry on their average performances, and this effect size was similar. We also found evidence that years of experience did not significantly affect Messi’s performance. The study concludes that individual rivalry has a significant positive effect on performance of athletes.

Effectiveness of Educational Videos Comparing Single Versus Multiple Topics: A Cluster Randomized Controlled Trial.

Background Dental caries and gingivitis are preventable diseases that remain highly prevalent among children globally and, while transmissible through the transfer of oral bacteria typically from mother to child, differ from communicable diseases that are spread through direct contact, air, or vectors. Unlike communicable diseases, dental caries and gingivitis can be effectively prevented through proper oral hygiene practices and dietary modifications. Oral health education (OHE) intends to improve oral hygiene practices and reduce oral health problems. However, evidence of the impact of multiple topics in OHE on preschool children is lacking. This study aimed to examine the effects of single- versus multiple-topic OHE delivered via video presentations on the plaque and gingival status of preschool children. Methods A parallel five-arm cluster randomized controlled trial was conducted on healthy preschool children aged five and six years. Children with chronic illnesses, disabilities, or conditions that could affect their oral health or ability to participate in the OHE intervention were excluded. OHE interventions were given to children from eight of the 10 classes assigned as intervention groups, while two classes served as the control group and received no intervention. The intervention groups received one, two, or three oral health topics using specially developed animation videos, in Malay language: toothbrushing technique (T), toothbrushing technique and the effects of sugar consumption on oral health (TS), toothbrushing technique and pathogenesis of dental caries and gingivitis (TP), and toothbrushing technique, the effects of sugar consumption on oral health, and pathogenesis of dental caries and gingivitis (TSP). Plaque and gingival scores, along with oral health knowledge, attitude, and skills (KAS), were recorded before and after the intervention. The CONSORT guidelines were followed in reporting. The analyses included descriptive statistics, one-way ANOVA, effect sizes, and multivariate analysis of covariance (MANCOVA) at a 5% significance level. Results A total of 160 participants were equally distributed into five groups (n = 32). There were no baseline differences in plaque or gingival scores. All groups showed significantly lower plaque and gingival scores post-intervention (p < 0.05), with effect sizes ranging from -1.1 to -0.7. No changes in oral health (KAS) were observed. The intervention groups had significantly lower plaque and gingival scores compared to the control group (p < 0.05), but no differences were found between them after adjusting for baseline KAS (p > 0.05). Conclusions This study suggests that including multiple topics in OHE programs for preschool children may not necessarily improve oral health outcomes. Simplified OHE may be more advantageous in terms of time, cost, human resources, and organization.

Academic procrastination and inappropriate use of social networks among university students

ABSTRACT Academic procrastination is the tendency to delay academic activities such as carrying out tasks, studying for exams and similar. This behaviour may be related to the inappropriate use of social networks, especially by those students who procrastinate the most. The aim of this study is to identify latent profiles of academic procrastination and determine whether there are differences in terms of the areas of delay (academic activities, final degree projects, studying for exams and keeping abreast of academic tasks) and the factors of inadequate use of social networks (obsession with networks, a lack of better control and excessive use). The participants in this study were 1784 students from 24 Spanish universities. The Spanish version of the procrastination assessment scale and the questionnaire on addiction to social networks were used for information gathering. A Latent Profile Analysis, multivariate analysis of variance (MANOVA) and multivariate covariance analysis (MANCOVA) were carried out to examine the differences between the profiles detected, delay areas and social network addiction factors. The results showed three latent profiles in procrastination behaviour: low, moderate and high procrastination. Moreover, significant differences were observed in terms of the areas of delay and network addiction factors. In conclusion, the greater the procrastinating behaviour, the greater the tendency to delay academic activities and present more frequently inadequate conduct in the use of social networks.

Has the COVID-19 pandemic negatively impacted children's development? An assessment of the neurodevelopment of premature babies born during the pandemic.

Pandemics, such as COVID-19, have the potential to adversely affect children's development due to a variety of negative factors at the level of children, families, and services. In this study the effect of the pandemic on the cognitive, language and motor development of premature babies who are among the most vulnerable group, were evaluated. The study included 236 premature infants who were followed at Hacettepe University Department of Developmental Pediatrics. The Bayley-Third Edition Developmental Assessment (Bayley III) was used to evaluate the neurodevelopment of 152 premature infants from the pre-pandemic group and 84 from the post-pandemic group at the corrected age of 18-24 months. The perinatal and sociodemographic risks were also evaluated. No difference in Bayley III scores (cognitive, language, and motor) was found between the pre- and post-pandemic groups. Furthermore, the multivariate covariance analysis displayed that regardless of the pandemic, infants with higher maternal education consistently scored higher in the cognitive, language, and motor domains; and the motor area scores of infants with moderate perinatal risk were also significantly higher than infants with high perinatal risk. It is crucial to monitor the development of vulnerable children who encounter developmental risks, such as premature babies. Fortunately, no significant effect was encountered during the COVID-19 pandemic. However, this does not underweigh the need for close supervision in extraordinary circumstances. Additionally, it should be noted that severe postnatal comorbidities, perinatal risks, and social factors, such as maternal education level, interact to influence the neurodevelopmental outcomes of preterm infants.

Comparing the effects of problem- and task-based learning on knowledge and clinical decision-making of nursing students concerning the use of transfusion medicine in pediatric nursing: An educational quasi-experimental study in Iran

BackgroundIn the pediatric care field, ensuring safe and effective blood transfusions, promptly identifying adverse reactions, and implementing appropriate interventions are crucial. Therefore, undergraduate nursing curricula need to be structured to meet these professional standards and prepare nursing students, as future team members, to respond to relevant clinical situations. The objective of this study was to investigate how problem- and task-based learning affects knowledge and clinical decision-making of undergraduate nursing students concerning the use of transfusion medicine in pediatric nursing. Material and methodsThis quasi-experimental study involved 82 nursing students recruited from two nursing schools in Iran using convenience sampling. Participants received educational content through either problem- (n = 40) or task-based learning (n = 42) methods. A researcher-made tool, comprising three parts and proven to be valid and reliable, was utilized for data collection. The tool was administered both before and immediately after the intervention. Data were analyzed using Wilcoxon rank-sum, Mann-Whitney U, Spearman's correlation and multivariate analysis of covariance tests via SPSS v16.0. A p-value of <0.05 was considered significant for all tests. ResultsThe median post-test knowledge and clinical decision-making scores within problem- and task-based learning groups were 62.68 vs. 74.65 and 53.33 vs. 76.67, respectively. Significant differences were observed between the mean pre- and post-test scores of both variables within both intervention groups (p < 0.05). Multivariate analysis of covariance revealed that task-based learning resulted in significant differences between the two groups in terms of knowledge (F = 87.9 %, p = 0.002, Eta2 = 0.114) and clinical decision-making (F = 99.9 %, p < 0.001, Eta2 = 0.271). ConclusionsGiven the greater effectiveness of task-based learning, nursing schools are advised to utilize this method in undergraduate nursing curricula to ensure the adequacy of the clinical skills acquired by nursing students prior to graduation.