Vitamin D deficiency is a globally important problem, particularly in children, but there is a lack of information regarding this deficiency in preschool children from southeastern Europe. This study aimed to establish the levels of 25-hydroxyvitamin D (25(OH)D) and associations of gender, time spent outdoors, physical activity (PA), and body mass index (as predictors) with the 25(OH)D level (outcome) in healthy preschool children. The participants were preschoolers (all 5–6 years of age) from southern Croatia. All the participants were tested during their mandatory medical examination 6–7 months prior to school enrollment. The PA was obtained using the preschool-age physical activity questionnaire (Pre-PAQ), which categorizes PA into five levels (from sedentary to vigorous PA). The prevalence of 25(OH)D deficiency was high: 58% of the children had 25(OH)D levels of 75 nmol/L) as the reference value identified gender as the only significant predictor of 25(OH)D status, with boys being at lower risk for 25(OH)D deficiency than girls. These results showed a high prevalence of 25(OH)D deficiency in preschoolers from the southern part of Croatia, which is additionally alarming based on the geographical position of the studied region (42° N) and its high number of sunshine hours (>2600 h per year). Future studies examining other potential correlates of 25(OH)D in the region are warranted.

Physical activity, body mass, and dietary habits are known to be important determinants of overall health status, but there is an evident lack of studies that examine these issues specifically in preschool children. The aim of this study was to identify associations that may exist between adhering to the Mediterranean diet (MD), levels of physical activity (PA), and body composition indices in apparently healthy preschool children from southern Croatia. Participants were 5- to 6-year-old preschoolers from the Mediterranean part of the country (the Split-Dalmatia County; n = 260, 126 females). Adherence to the MD was observed by the Mediterranean Diet Quality Index (KIDMED), PA level was evaluated by the Preschool-age Children’s Physical Activity Questionnaire (Pre-PAQ), and responses were collected from the parents. The participants’ waist circumferences (in cm), waist-to-hip ratios, and body mass index (in kg/m², and in a z-score calculated relative to the normative value for age and sex) were used as indicators of body composition. All children were of the same age and tested over a one-month period of the same year as a part of the regular examination undertaken before attending elementary school. With only 6% of the children having a low KIDMED score, adherence to the MD was high. MD adherence was higher in girls (Chi-square = 15.31, p < 0.01) and children who live on the coast of the Adriatic Sea (Chi-square = 18.51, p < 0.01). A mixed effects logistic regression (with kindergarten as random factor) identified sedentary activity to be negatively associated with MD adherence (OR per point: 0.65, 95% CI: 0.44–0.91). High adherence to the MD in the studied sample may be attributed to regulated feeding in kindergarten. Considering that most Croatian elementary schools do not provide food to their students, MD adherence should be investigated later in life and also in other parts of the country where the MD is culturally less prevalent.

Vitamin D level is known to be a factor potentially influencing physical fitness, but few studies have examined this phenomenon among youth athletes. We aimed to evaluate the associations of vitamin D levels (as measured by 25-hydroxyvitamin D concentrations—25(OH)D) with various physical fitness and motor performance tests in youth football (soccer) players. This cross-sectional study included a total of 52 youth soccer players (15.98 ± 2.26 years old) from Southern Croatia. The participants were evaluated at the end of the winter period and data were collected of anthropometric measures (body mass and body height), vitamin D status (25(OH)D levels), physical fitness tests (sprints of 10 and 20 m, 20 yards test, the countermovement jump, the reactive strength index (RSI)) and motor performance tests (the soccer-specific CODS, the soccer-specific agility, and static balance). Among the studied players, 54% had 25(OH)D insufficiency/deficiency, showing a lack of 25(OH)D is widespread even in youth athletes living at a southern latitude. The 25(OH)D level was correlated with sprint 20 m, 20 yards tests, and RSI, showing a greater role of 25(OH)D in physical fitness tests where energetic capacity is essential than in sport-related motor performance tests where skills are crucial. Our results support the idea that vitamin D can play a determinant role in physical fitness tests with a clear physiological component, but is not crucial in motor performance tests related to specific sports where skills are a key component. Future studies should investigate the effects of vitamin D supplementation on the performance in physical fitness and motor performance tests among youth athletes.

The rising prevalence of obesity among children and adolescents is a global public health concern, significantly contributing to noncommunicable chronic diseases such as cardiovascular disease, diabetes and cancer. In Croatia, obesity rates are alarmingly high, affecting both children and adults. Data from the Institute of the Public Health of Split-Dalmatian County were analyzed to identify trends in body mass index (BMI) among primary school students in Split, Croatia and possible connection with sports participation and parental education levels. A longitudinal analysis of students was conducted across three medical examinations during primary school education. The findings showed an increase in the prevalence of overweight and obesity from 23.4% in the first to 30.2% in the fifth grade, returning back to 23.4% in the eighth grade. Significant differences among students were associated with parental education level. Boys who participated in sports demonstrated a higher BMI in the first grade but there was no difference in BMI in later grades. Sports participation had no significant impact on the BMI of girls. The study underscores the critical role of parental education in influencing children’s weight status and highlights the necessity of tailored public health interventions to address these trends from an early age. The implementation of comprehensive strategies, including educational programs and policy measures as part of the national health policy, is the only way to combat childhood obesity and promote long-term health benefits.

Within the last decade, childhood obesity has become a serious problem, especially during the COVID-19 pandemic. This research paper aimed to examine whether body mass index (BMI) was higher during the pandemic (2020–2022) than in the pre-pandemic period (2012/2013–2019) using trends related to sex, urban–rural area, and physical activity (PA). This study included data from physical examinations of an entire population of primary school children from Split-Dalmatia County (Croatia) over a period of 10 years. There were 103,804 students from the first, fifth, and eighth grades who participated in the analysis. During the pandemic, the BMI of all the students increased, except for eighth-grade girls. Generations of eighth graders have had significantly different BMIs throughout the past decade. We found that first graders were overweight and obese in urban areas, while in rural areas, this problem was experienced by upper grades. Girls were more overweight and obese in the first and eighth grades, but boys experienced this more in the fifth grade. Reduced PA influenced an increase in BMI in both sexes, especially in girls. During the pandemic, this situation became worse. This study could be useful to experts for the creation of new policies for Split-Dalmatia County and surrounding regions that are similar economically and culturally.

Introduction In Croatia, any child having developmental disabilities with an essential need of school educational support is entitled to accessibility and inclusion in order to be provided with free primary and high school education. A psychosomatic disorder in child is determined by the specialist of school and adolescent medicine who along with the team of school expert associates (psychologist, pedagogue, defectologist) is responsible for ensuring an adequate form of school education and support for the eligible child. Within his activities at the primary level of healthcare in the public health system, the school doctor continuously monitors health condition and abilities in children and adolescents, the implementation of therapeutic, rehabilitation and other professional practices as well as the school education adjustment meeting the needs of persons with health disabilities. The Aim To present the results of the psychosomatic assessment in children as well as to determine the adequate programme of the elementary and high school education for school children with developmental disabilities. To report on most common disabilities affecting the educational attainment and functioning in school children. The subjects and methods: By using retrospective data analysis of the annual reports comprising 172 school medicine teams in the Republic of Croatia from the elementary and high school children, the proportion of children who due to developmental disabilities were provided with an adequate school education programme, was determined. In children with disabilities an adequate form of school education was determined by gender and school, as well as most common disabilities affecting educational attainments. The results: When establishing psychosomatic condition in children due to developmental disabilities for 5.2% of elementary school children and 1% of high school children, one of the school education forms was determined. In relation to school children provided with the adequate form of school education in elementary school 37% girls followed regular programme with an individual approach, 49% girls were provided with an individual approach and adjusted programme, 6% girls with a special programme, whereas 8% girls were in the programme for acquiring competences. Within regular programme an individual approach in school education was provided for 45% elementary school boys, an individual approach and adjusted programme for 41% boys, a special programme for 5% boys, and in the programme for acquiring competences there were 9% boys. In high school within the regular programme, an individual approach was provided for 41% females and 39% males, an individual approach and adjusted programme were followed by 21% females and 20% males, special programme was provided for 11% females and 13% males, whereas in the programme for acquiring competences and individual approach were 27% females and 28% males. In children provided with an adequate form of school education most common diagnoses according to DSM-10 classification affecting school attainments and functioning of children related to voice and speech disorder as well as specific learning difficulties in 37.9%, central nervous system impairment in 20.7%, mental disorder and behaviour disorder in 19.5%, and intellectual disabilities in 14.2% children. The conclusion: The school child with developmental disabilities requires educational support and education mandatory for all children having developmental disabilities in order to enable positive health-related and educational outcomes along with maintaining and promoting physical and mental health. In order to facilitate school education of children with developmental disabilities and to promote developmental potentials in children, a multidisciplinary approach is essential to make disability assessment in children, to estimate their abilities and capacities as well as to determine developmentally appropriate education and support.