Use of a Web-Based Dietary Assessment Tool (RiksmatenFlex) in Swedish Adolescents: Comparison and Validation Study

BACKGROUND: A Web-based dietary assessment tool-RiksmatenFlex-was developed for the national dietary survey of adolescents in Sweden. OBJECTIVE: This study aimed to describe the Web-based method RiksmatenFlex and to test the validity of the reported dietary intake by comparing dietary intake with 24-hour dietary recalls (recall interviews), estimated energy expenditure, and biomarkers. METHODS: Adolescents aged 11-12, 14-15, and 17-18 years were recruited through schools. In total, 78 students had complete dietary information and were included in the study. Diet was reported a few weeks apart with either RiksmatenFlexDiet (the day before and a random later day) or recall interviews (face-to-face, a random day later by phone) in a cross-over, randomized design. At a school visit, weight and height were measured and blood samples were drawn for biomarker analyses. Students wore an accelerometer for 7 days for physical activity measurements. Dietary intake captured by both dietary methods was compared, and energy intake captured by both methods was compared with the accelerometer-estimated energy expenditure (EEest). Intake of whole grain wheat and rye and fruit and vegetables by both methods was compared with alkylresorcinol and carotenoid concentrations in plasma, respectively. RESULTS: The mean of the reported energy intake was 8.92 (SD 2.77) MJ by RiksmatenFlexDiet and 8.04 (SD 2.67) MJ by the recall interviews (P=.01). Intake of fruit and vegetables was 224 (169) g and 227 (150) g, and whole grain wheat and rye intake was 12.4 (SD 13.2) g and 12.0 (SD 13.1) g, respectively; the intakes of fruit and vegetables as well as whole grain wheat and rye did not differ between methods. Intraclass correlation coefficients ranged from 0.57 for protein and carbohydrates to 0.23 for vegetables. Energy intake by RiksmatenFlexDiet was overreported by 8% (P=.03) but not by the recall interviews (P=.53) compared with EEest. The Spearman correlation coefficient between reported energy intake and EEest was 0.34 (P=.008) for RiksmatenFlexDiet and 0.16 (P=.21) for the recall interviews. Spearman correlation coefficient between whole grain wheat and rye and plasma total alkylresorcinol homologs was 0.36 (P=.002) for RiksmatenFlexDiet and 0.29 (P=.02) for the recall interviews. Spearman correlations between intake of fruit and vegetables and plasma carotenoids were weak for both dietary tools. The strongest correlations were observed between fruit and vegetable intake and lutein/zeaxanthin for RiksmatenFlexDiet (0.46; P<.001) and for recall interviews (0.28; P=.02). CONCLUSIONS: RiksmatenFlexDiet provides information on energy, fruit, vegetables, and whole grain wheat and rye intake, which is comparable with intake obtained from recall interviews in Swedish adolescents. The results are promising for cost-effective dietary data collection in upcoming national dietary surveys and other studies in Sweden. Future research should focus on how, and if, new technological solutions could reduce dietary reporting biases

Dielectric properties characterization of La- and Dy-doped BiFeO3 thin films

The dielectric response of La- and Dy- doped BiFeO3 thin films at microwave frequencies (up to 12 GHz) has been monitored as a function of frequency, direct current (dc) electric field, and magnetic field in a temperature range from 25 to 300 °C. Both the real and imaginary parts of the response have been found to be non-monotonic (oscillating) functions of measuring frequency. These oscillations are not particularly sensitive to a dc electric field; however, they are substantially dampened by a magnetic field. The same effect has been observed when the volume of the characterized sample is increased. This phenomenon is attributed to the presence of a limited number of structural features with a resonance type response. The exact origin of these features is unknown at present. Leakage current investigations were performed on the whole set of films. The films were highly resistive with low leakage current, thereby giving us confidence in the microwave measurements. These typically revealed ‘N'-type I-V characteristic

Microwave dielectric loss in oxides: Theory and experiment

Published versio

A genome-wide association study in Europeans and South Asians identifies five new loci for coronary artery disease

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Children with profound intellectual and multiple disabilities and their participation in family activities

Background. Families are essential parts of any community and throughout childhood one’s family serves as the central setting wherein opportunities for participation are offered. There is a lack of knowledge about participation of children with profound intellectual and multiple disabilities (PIMD) in family activities and how improved participation can be reached. Gathering such knowledge could enable an improvement in child functioning and wellbeing and also ease everyday life for families of a child with PIMD. Aim. The overall aim of this thesis was to explore participation seen as presence and engagement in family activities in children with PIMD and to find strategies that might facilitate this participation. Material and Methods. The research was cross-sectional and conducted with descriptive, explorative designs. First a quantitative, comparative design was used including questionnaire data from 60 families with a child with PIMD and 107 families with children with typical development (TD) (I, II). Following that, a qualitative, inductive design was used with data from individual interviews with parents of 11 children with PIMD and nine hired external personal assistants (III). Finally a mixed method design was conducted where collected quantitative data was combined with the qualitative data from the previous studies (IV). Results. It was found that children with PIMD participated less often, compared to children with TD, in a large number of family activities, however they participated more often in four physically less demanding activities. Children with PIMD also participated in a less diverse set of activities. Additionally, they overall had a lower level of engagement in the activities; however, both groups of children showed higher engagement in enjoyable, child-driven activities and lower engagement in routine activities. The motor ability of the child with PIMD was found to be the main child characteristic that affected their presence in the family activities negatively and child cognition was found to be the personal characteristic that affected their engagement in the activities. The child’s presence and engagement were influenced to a lesser extent by family socio-economic factors when compared to families with children with TD. Parents and hired external personal assistants described several strategies to be used to improve participation of the children with PIMD, such as by showing engagement in the activities oneself and by giving the child opportunities to influence the activities. The role of the hired external personal assistant, often considered as a family member for the child, was described as twofold: one supporting or reinforcing role in relation to the child and one balancing role in relation to the parents/the rest of the family, including reducing the experience of being burdened and showing sensitivity to family life and privacy. Conclusion. A child with PIMD affects the family’s functioning and the family’s functioning affects the child. Child and environmental factors can act as barriers that have the result that children with PIMD may experience fewer and less varied activities that can generate engaged interaction within family activities than children with TD do. Accordingly, an awareness and knowledge of facilitating strategies for improved participation in family activities is imperative. There needs to be someone in the child’s environment who sets the scene/stage and facilitates the activity so as to increase presence and engagement in proximal processes based on the child’s needs. The family, in turn, needs someone who can provide respite to obtain balance in the family system. External personal assistance includes these dual roles and is of importance in families with a child with PIMD

"Nothing can be changed if the people don’t change" : Costa Rican registered nurses’ views and experiences of caring for patients with dengue fever

Dengue fever has increased to the point where it has become a major international public health and economical problem, mainly in urban and semi-urban areas in tropical and subtropical regions. Worldwide 2,5 billion people live in regions where dengue can be transmitted and approximately 100 million people get infected yearly. In 2002 there was a great outbreak in Latin America, and Costa Rica was in the top three regarding reported cases. At the time of writing, reports show that cases of dengue are currently low in Costa Rica. Although the figures vary, dengue remains a public health problem. This study aimed to describe Costa Rican registered nurses’ views and experiences of caring for patients with dengue fever. Data were collected with semi-structured interviews and conducted with eight registered nurses from Costa Rica, and analysed with qualitative content analysis method with search for similarities and differences which later were categorized. The result was divided into five categories; the conception about dengue fever, caring, patient education, prevention and the future. The result showed a similar perception of the disease and was described as terrible, causing a lot of suffering for the patient, as well as a burden on the health care, that requires large financial resources. To control dengue and suppress the proliferation it is important to have different preventive means and to educate people to achieve a change of the mindset