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Delisle Nystrom, C., Forsum, E., Henriksson, H., Trolle-Lagerros, Y., Larsson, C., Maddison, R., . . . Löf, M. (2016). A Mobile Phone Based Method to Assess Energy and Food Intake in Young Children: A Validation Study against the Doubly Labelled Water Method and 24 h Dietary Recalls. Nutrients, 8(1), 50.
Open this publication in new window or tab >>A Mobile Phone Based Method to Assess Energy and Food Intake in Young Children: A Validation Study against the Doubly Labelled Water Method and 24 h Dietary Recalls
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2016 (English)In: Nutrients, ISSN 2072-6643, E-ISSN 2072-6643, Vol. 8, no 1, 50- p.Article in journal (Refereed) Published
Abstract [en]

Mobile phones are becoming important instruments for assessing diet and energy intake. We developed the Tool for Energy Balance in Children (TECH), which uses a mobile phone to assess energy and food intake in pre-school children. The aims of this study were: (a) to compare energy intake (EI) using TECH with total energy expenditure (TEE) measured via doubly labelled water (DLW); and (b) to compare intakes of fruits, vegetables, fruit juice, sweetened beverages, candy, ice cream, and bakery products using TECH with intakes acquired by 24 h dietary recalls. Participants were 39 healthy, Swedish children (5.5 +/- 0.5 years) within the ongoing Mobile-based Intervention Intended to Stop Obesity in Preschoolers (MINISTOP) obesity prevention trial. Energy and food intakes were assessed during four days using TECH and 24 h telephone dietary recalls. Mean EI (TECH) was not statistically different from TEE (DLW) (5820 +/- 820 kJ/24 h and 6040 +/- 680kJ/24 h, respectively). No significant differences in the average food intakes using TECH and 24 h dietary recalls were found. All food intakes were correlated between TECH and the 24 h dietary recalls (r = 0.665-0.896, p < 0.001). In conclusion, TECH accurately estimated the average intakes of energy and selected foods and thus has the potential to be a useful tool for dietary studies in pre-school children, for example obesity prevention trials.

Place, publisher, year, edition, pages
MDPI AG, 2016
Keyword
mobile phones; energy intake; food intake; total energy expenditure; child; DLW; 24 h dietary recall
National Category
Clinical Medicine Basic Medicine
Identifiers
urn:nbn:se:liu:diva-128982 (URN)10.3390/nu8010050 (DOI)000374589300048 ()26784226 (PubMedID)
Note

Funding Agencies|Swedish Research Council [2012-2883]; Swedish Research Council for Health, Working Life and Welfare [2012-0906]; Bo and Vera Axson Johnsons Foundation; Karolinska Institutet

Available from: 2016-06-09 Created: 2016-06-07 Last updated: 2018-01-10
Spreco, A. & Timpka, T. (2016). Algorithms for detecting and predicting influenza outbreaks: metanarrative review of prospective evaluations. BMJ Open, 6(5), e010683.
Open this publication in new window or tab >>Algorithms for detecting and predicting influenza outbreaks: metanarrative review of prospective evaluations
2016 (English)In: BMJ Open, ISSN 2044-6055, E-ISSN 2044-6055, Vol. 6, no 5, e010683- p.Article, review/survey (Refereed) Published
Abstract [en]

Objectives Reliable monitoring of influenza seasons and pandemic outbreaks is essential for response planning, but compilations of reports on detection and prediction algorithm performance in influenza control practice are largely missing. The aim of this study is to perform a metanarrative review of prospective evaluations of influenza outbreak detection and prediction algorithms restricted settings where authentic surveillance data have been used. Design The study was performed as a metanarrative review. An electronic literature search was performed, papers selected and qualitative and semiquantitative content analyses were conducted. For data extraction and interpretations, researcher triangulation was used for quality assurance. Results Eight prospective evaluations were found that used authentic surveillance data: three studies evaluating detection and five studies evaluating prediction. The methodological perspectives and experiences from the evaluations were found to have been reported in narrative formats representing biodefence informatics and health policy research, respectively. The biodefence informatics narrative having an emphasis on verification of technically and mathematically sound algorithms constituted a large part of the reporting. Four evaluations were reported as health policy research narratives, thus formulated in a manner that allows the results to qualify as policy evidence. Conclusions Awareness of the narrative format in which results are reported is essential when interpreting algorithm evaluations from an infectious disease control practice perspective.

Place, publisher, year, edition, pages
BMJ PUBLISHING GROUP, 2016
Keyword
influenza; detection algorithms; prediction algorithms; evaluation; meta-narrative review
National Category
Health Care Service and Management, Health Policy and Services and Health Economy
Identifiers
urn:nbn:se:liu:diva-130311 (URN)10.1136/bmjopen-2015-010683 (DOI)000378414700068 ()27154479 (PubMedID)
Note

Funding Agencies|Swedish Civil Contingencies Agency [2010-2788]; Swedish Science Council [2008-5252]

Available from: 2016-07-31 Created: 2016-07-28 Last updated: 2017-11-28
Timpka, T., Eriksson, H., Holm, E., Strömgren, M., Ekberg, J., Spreco, A. & Dahlström, Ö. (2016). Relevance of workplace social mixing during influenza pandemics: an experimental modelling study of workplace cultures. Epidemiology and Infection, 144(10), 2031-2042.
Open this publication in new window or tab >>Relevance of workplace social mixing during influenza pandemics: an experimental modelling study of workplace cultures
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2016 (English)In: Epidemiology and Infection, ISSN 0950-2688, E-ISSN 1469-4409, Vol. 144, no 10, 2031-2042 p.Article in journal (Refereed) Published
Abstract [en]

Workplaces are one of the most important regular meeting places in society. The aim of this study was to use simulation experiments to examine the impact of different workplace cultures on influenza dissemination during pandemics. The impact is investigated by experiments with defined social-mixing patterns at workplaces using semi-virtual models based on authentic sociodemographic and geographical data from a North European community (population 136 000). A simulated pandemic outbreak was found to affect 33% of the total population in the community with the reference academic-creative workplace culture; virus transmission at the workplace accounted for 10.6% of the cases. A model with a prevailing industrial-administrative workplace culture generated 11% lower incidence than the reference model, while the model with a self-employed workplace culture (also corresponding to a hypothetical scenario with all workplaces closed) produced 20% fewer cases. The model representing an academic-creative workplace culture with restricted workplace interaction generated 12% lower cumulative incidence compared to the reference model. The results display important theoretical associations between workplace social-mixing cultures and community-level incidence rates during influenza pandemics. Social interaction patterns at workplaces should be taken into consideration when analysing virus transmission patterns during influenza pandemics.

Place, publisher, year, edition, pages
CAMBRIDGE UNIV PRESS, 2016
Keyword
Epidemiology; infectious disease control; influenza; medical informatics (veterinary and medical); modelling
National Category
Probability Theory and Statistics
Identifiers
urn:nbn:se:liu:diva-130396 (URN)10.1017/S0950268816000169 (DOI)000379785600002 ()26847017 (PubMedID)
Note

Funding Agencies|Swedish Civil Contingencies Agency [2010-2788]; Swedish Science Council [2006-4433, 2008-5252]; Swedish Governmental Agency for Innovations (VINNOVA) [2011-03231]

Available from: 2016-08-15 Created: 2016-08-05 Last updated: 2017-05-03
Delisle, C., Sandin, S., Forsum, E., Henriksson, H., Trolle-Lagerros, Y., Larsson, C., . . . Löf, M. (2015). A web- and mobile phone-based intervention to prevent obesity in 4-year-olds (MINISTOP): a population-based randomized controlled trial. BMC Public Health, 15(95).
Open this publication in new window or tab >>A web- and mobile phone-based intervention to prevent obesity in 4-year-olds (MINISTOP): a population-based randomized controlled trial
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2015 (English)In: BMC Public Health, ISSN 1471-2458, E-ISSN 1471-2458, Vol. 15, no 95Article in journal (Refereed) Published
Abstract [en]

Background: Childhood obesity is an increasing health problem globally. Overweight and obesity may be established as early as 2-5 years of age, highlighting the need for evidence-based effective prevention and treatment programs early in life. In adults, mobile phone based interventions for weight management (mHealth) have demonstrated positive effects on body mass, however, their use in child populations has yet to be examined. The aim of this paper is to report the study design and methodology of the MINSTOP (Mobile-based Intervention Intended to Stop Obesity in Preschoolers) trial. Methods/Design: A two-arm, parallel design randomized controlled trial in 300 healthy Swedish 4-year-olds is conducted. After baseline measures, parents are allocated to either an intervention-or control group. The 6-month mHealth intervention consists of a web-based application (the MINSTOP app) to help parents promote healthy eating and physical activity in children. MINISTOP is based on the Social Cognitive Theory and involves the delivery of a comprehensive, personalized program of information and text messages based on existing guidelines for a healthy diet and active lifestyle in pre-school children. Parents also register physical activity and intakes of candy, soft drinks, vegetables as well as fruits of their child and receive feedback through the application. Primary outcomes include body fatness and energy intake, while secondary outcomes are time spent in sedentary, moderate, and vigorous physical activity, physical fitness and intakes of fruits and vegetables, snacks, soft drinks and candy. Food and energy intake (Tool for Energy balance in Children, TECH), body fatness (pediatric option for BodPod), physical activity (Actigraph wGT3x-BT) and physical fitness (the PREFIT battery of five fitness tests) are measured at baseline, after the intervention (six months after baseline) and at follow-up (12 months after baseline). Discussion: This novel study will evaluate the effectiveness of a mHealth program for mitigating gain in body fatness among 4-year-old children. If the intervention proves effective it has great potential to be implemented in child-health care to counteract childhood overweight and obesity.

Place, publisher, year, edition, pages
BioMed Central, 2015
Keyword
Childhood obesity; Randomized controlled trial; Mobile phones; Body composition
National Category
Clinical Medicine Basic Medicine
Identifiers
urn:nbn:se:liu:diva-115821 (URN)10.1186/s12889-015-1444-8 (DOI)000349745800001 ()25778151 (PubMedID)
Note

Funding Agencies|Swedish Research Council; Swedish Research Council for Health, Working life and Welfare; Karolinska Institute; Bo and Vera Ax:son Johnssons foundation; Spanish Ministry of Economy and Competitiveness [RYC-2010-05957, RYC-2011-09011]

Available from: 2015-03-20 Created: 2015-03-20 Last updated: 2018-01-11
Kalnina, L., Sauka, M., Timpka, T., Dahlström, Ö., Nylander, E., Selga, G., . . . Larins, V. (2015). Body fat in children and adolescents participating in organized sports: Descriptive epidemiological study of 6048 Latvian athletes. Scandinavian Journal of Public Health, 43(6), 615-622.
Open this publication in new window or tab >>Body fat in children and adolescents participating in organized sports: Descriptive epidemiological study of 6048 Latvian athletes
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2015 (English)In: Scandinavian Journal of Public Health, ISSN 1403-4948, E-ISSN 1651-1905, Vol. 43, no 6, 615-622 p.Article in journal (Refereed) Published
Abstract [en]

Background: Pressure among young athletes to meet body composition goals may lead to poor nutrition and affect growth. Aims: To examine the proportion of body fat (%BF), measured by bioimpedance analysis, among Latvian children and adolescents participating in organized sports. Methods: Our study had a nationally representative sample of 6048 young athletes, aged 10-17 years. Their %BF was measured using a multifrequency, 8-pole, bioelectrical impedance leg-to-hand analyzer. Results: About 19.2% (CI 14.4-20.0) of boys and 15.1% (CI 14.0-16.3) of girls had a %BF value below the recommended levels. The %BF in young female athletes participating in aesthetic sports was lower than among their peers participating in other sports. Young male athletes participating in aesthetic sports had lower %BF levels at 10 and 12 years of age, compared with participants in weight-class sports; and lower levels of %BF from age 10-14 years, compared with participants in non-weight-sensitive sports. Conclusions: Almost every fifth child and adolescent participating in organized sports displayed critically low body fat levels. Body fat needs to be assessed regularly in young athletes, to prevent negative consequences on health.

Place, publisher, year, edition, pages
SAGE PUBLICATIONS LTD, 2015
Keyword
Adolescents; aesthetic sports; body fat; body mass index; children; eating disorders; Latvia; percentage body fat; reference curves; sports; sport types; young athletes
National Category
Basic Medicine Clinical Medicine
Identifiers
urn:nbn:se:liu:diva-121440 (URN)10.1177/1403494815581696 (DOI)000360391600008 ()25948090 (PubMedID)
Note

Funding Agencies|State Sports Medicine Centre of the Latvian Ministry of Health

Available from: 2015-09-18 Created: 2015-09-18 Last updated: 2018-01-11
Jacobsson, J. & Timpka, T. (2015). Classification of Prevention in Sports Medicine and Epidemiology. Sports Medicine, 45(11), 1483-1487.
Open this publication in new window or tab >>Classification of Prevention in Sports Medicine and Epidemiology
2015 (English)In: Sports Medicine, ISSN 0112-1642, E-ISSN 1179-2035, Vol. 45, no 11, 1483-1487 p.Article, review/survey (Refereed) Published
Abstract [en]

It is today recognized that a large share of manifestations of ill health associated with sports participation is preventable and that a focus should be on implementation of effective prevention programs. One hindrance for implementation of effective preventive measures in sports medicine may be that an update of preventive frameworks to the current health challenges has not been performed. We introduce classifications of prevention that are adjusted to the health challenges faced by sports participants in the present day. To enable more precise characterizations of preventive measures, we find it necessary to describe them in two dimensions. In one dimension, pathological developments in the body are used as a basis for classification of preventive measures, while the other dimension classifies prevention on the grounds of epidemiological risk indicators. We conclude that longitudinal research combining diagnostic procedures, surveillance, and targeted interventions is needed to enable the introduction of prevention programs for athletes in the beginning of their sporting career at the pre-diagnostic stage, as well as suitable prevention measures for the adult elite athletes. A more distinct classification of prevention supports a specific and cost-effective planning and translation of sports injury prevention and safety promotion adjusted to the delivery settings, various injury types, and different groups of athletes. The present classifications constitute an additional conceptual foundation for such efforts.

Place, publisher, year, edition, pages
ADIS INT LTD, 2015
National Category
Basic Medicine
Identifiers
urn:nbn:se:liu:diva-123816 (URN)10.1007/s40279-015-0368-x (DOI)000366829300001 ()26245875 (PubMedID)
Available from: 2016-01-11 Created: 2016-01-11 Last updated: 2018-01-10
Edouard, P., Jacobsson, J., Timpka, T., Alonso, J.-M., Kowalski, J., Nilsson, S., . . . Branco, P. (2015). Extending in-competition Athletics injury and illness surveillance with pre-participation risk factor screening: A pilot study. Physical Therapy in Sport, 16(2), 98-106.
Open this publication in new window or tab >>Extending in-competition Athletics injury and illness surveillance with pre-participation risk factor screening: A pilot study
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2015 (English)In: Physical Therapy in Sport, ISSN 1466-853X, E-ISSN 1873-1600, Vol. 16, no 2, 98-106 p.Article in journal (Refereed) Published
Abstract [en]

Objectives: To explore the performance of retrospective health data collected from athletes before Athletics championships for the analysis of risk factors for in-competition injury and illness (IandI). Methods: For the 2013 European Athletics Indoor Championships, a self-report questionnaire (PHQ) was developed to record the health status of 127 athletes during the 4 weeks prior to the championship. Physician-based surveillance of in-competition IandI among all 577 athletes registered to compete was pursued during the championships. Results: 74 athletes (58.3%) from the sample submitted a complete PHQ, 21 (28%) of these athletes sustained at least one injury and/or illness during the championships. Training more than 12 h/week predisposed for sustaining an in-competition injury, and a recent health problem for in-competition illness. Among the 577 registered athletes, 60 injuries (104/1000 registered athletes) were reported. 31% of injuries were caused by the track, and 29% by overuse. 29 illnesses were reported (50/1000 registered athletes); upper respiratory tract infection and gastro-enteritis/diarrhoea were the most reported diagnoses. Conclusions: Pre-participation screening using athletes self-report PHQ showed promising results with regard to identification of individuals at risk. Indoor injury types could be attributed to extrinsic factors, such as small track size, track inclination, and race tactics. (C) 2014 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
Elsevier, 2015
Keyword
Sports injury prevention; Pre-competition medical assessment; Injury/illness surveillance; Epidemiology
National Category
Basic Medicine
Identifiers
urn:nbn:se:liu:diva-119592 (URN)10.1016/j.ptsp.2014.05.003 (DOI)000355026600003 ()25168228 (PubMedID)
Available from: 2015-06-23 Created: 2015-06-22 Last updated: 2018-01-11
Timpka, T., Jacobsson, J., Ekberg, J., Finch, C. F., Bichenbach, J., Edouard, P., . . . Manuel Alonso, J. (2015). Meta-narrative analysis of sports injury reporting practices based on the Injury Definitions Concept Framework (IDCF): A review of consensus statements and epidemiological studies in athletics (track and field). Journal of Science and Medicine in Sport, 18(6), 643-650.
Open this publication in new window or tab >>Meta-narrative analysis of sports injury reporting practices based on the Injury Definitions Concept Framework (IDCF): A review of consensus statements and epidemiological studies in athletics (track and field)
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2015 (English)In: Journal of Science and Medicine in Sport, ISSN 1440-2440, E-ISSN 1878-1861, Vol. 18, no 6, 643-650 p.Article, review/survey (Refereed) Published
Abstract [en]

Objectives: Consistency in routines for reporting injury has been a focus of development efforts in sports epidemiology for a long time. To gain an improved understanding of current reporting practices, we applied the Injury Definitions Concept Framework (IDCF) in a review of injury reporting in a subset of the field. Design: Meta-narrative review. Methods: An analysis of injury definitions reported in consensus statements for different sports and studies of injury epidemiology in athletics (track and field) published in PubMed between 1980 and 2013 was performed. Separate narratives for each of the three reporting contexts in the IDCF were constructed from the data. Results: Six consensus statements and 14 studies reporting on athletics injury epidemiology fulfilled the selection criteria. The narratives on sports performance, clinical examination, and athlete self-report contexts were evenly represented in the eligible studies. The sports performance and athlete self-report narratives covered both professional and community athletes as well as training and competition settings. In the clinical examination narrative, data collection by health service professionals was linked to studies of professional athletes at international championships. Conclusions: From an application of the IDCF in a review of injury reporting in sports epidemiology we observed a parallel usage of reporting contexts in this field of research. The co-existence of reporting methodologies does not necessarily reflect a problematic situation, but only provided that firm precautions are taken when comparing studies performed in the different contexts. (C) 2014 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
ELSEVIER SCI LTD, 2015
Keyword
Sports epidemiology; Terminology; Sports injury; Overuse injuries; Qualitative methods
National Category
Basic Medicine
Identifiers
urn:nbn:se:liu:diva-122652 (URN)10.1016/j.jsams.2014.11.393 (DOI)000363599000005 ()25620458 (PubMedID)
Available from: 2015-11-16 Created: 2015-11-13 Last updated: 2018-01-10
Dahlström, Ö., Jacobsson, J. & Timpka, T. (2015). Overcoming the organization-practice barrier in sports injury prevention: A nonhierarchical organizational model. Scandinavian Journal of Medicine and Science in Sports, 25(4), e414-e422.
Open this publication in new window or tab >>Overcoming the organization-practice barrier in sports injury prevention: A nonhierarchical organizational model
2015 (English)In: Scandinavian Journal of Medicine and Science in Sports, ISSN 0905-7188, E-ISSN 1600-0838, Vol. 25, no 4, e414-e422 p.Article in journal (Refereed) Published
Abstract [en]

The organization of sports at the national level has seldom been included in scientific discussions of sports injury prevention. The aim of this study was to develop a model for organization of sports that supports prevention of overuse injuries. The quality function deployment technique was applied in seminars over a two-season period to develop a national organizational structure for athletics in Sweden that facilitates prevention of overuse injuries. Three central features of the resulting model for organization of sports at the national level are (a) diminishment of the organizational hierarchy: participatory safety policy design is introduced through annual meetings where actors from different sectors of the sporting community discuss training, injury prevention, and sports safety policy; (b) introduction of a safety surveillance system: a ubiquitous system for routine collection of injury and illness data; and (c) an open forum for discussion of safety issues: maintenance of a safety forum for participants from different sectors of the sport. A nonhierarchical model for organization of sports at the national level - facilitated by modern information technology - adapted for the prevention of overuse injuries has been developed. Further research is warranted to evaluate the new organizational model in prospective effectiveness studies.

Place, publisher, year, edition, pages
Wiley: 12 months, 2015
Keyword
Safe sports; implementation; safety policy; athletics; sports bodies; sports organization
National Category
Basic Medicine
Identifiers
urn:nbn:se:liu:diva-120446 (URN)10.1111/sms.12327 (DOI)000357831300010 ()25430864 (PubMedID)
Note

Funding Agencies|Swedish Centre for Sports Research [P2014-167, P2014-0048]

Available from: 2015-08-12 Created: 2015-08-11 Last updated: 2018-01-11
Alonso, J.-M., Jacobsson, J., Timpka, T., Ronsen, O., Kajenienne, A., Dahlström, Ö., . . . Edouard, P. (2015). Preparticipation injury complaint is a risk factor for injury: a prospective study of the Moscow 2013 IAAF Championships.. British Journal of Sports Medicine, 49(17), 1118-U45.
Open this publication in new window or tab >>Preparticipation injury complaint is a risk factor for injury: a prospective study of the Moscow 2013 IAAF Championships.
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2015 (English)In: British Journal of Sports Medicine, ISSN 0306-3674, E-ISSN 1473-0480, Vol. 49, no 17, 1118-U45 p.Article in journal (Refereed) Published
Abstract [en]

OBJECTIVES: To determine the health status of athletes before the start of an international athletics championship and to determine whether preparticipation risk factors predicted in-championship injuries.

METHODS: At the beginning of the 2013 International Association of Athletics Federations (IAAF) World Championships, all registered athletes (n=1784) were invited to complete a preparticipation health questionnaire (PHQ) on health status during the month preceding the championships. New injuries that occurred at the championships were prospectively recorded.

RESULTS: The PHQ was completed by 698 (39%) athletes; 204 (29.2%) reported an injury complaint during the month before the championships. The most common mode of onset of preparticipation injury complaints was gradual (43.6%). Forty-nine athletes in the study reported at least one injury during the championships. Athletes who reported a preparticipation injury complaint were at twofold increased risk for an in-championship injury (OR=2.09; 95% CI 1.16 to 3.77); p=0.014). Those who reported a preparticipation gradual-onset injury complaint were at an almost fourfold increased risk for an in-championship time-loss injury (OR=3.92; 95% CI 1.69 to 9.08); p=0.001). Importantly, the preparticipation injury complaint severity score was associated with the risk of sustaining an in-championship injury (OR=1.14; 95% CI 1.06 to 1.22); p=0.001).

SUMMARY AND CONCLUSIONS: About one-third of the athletes participating in the study reported an injury complaint during the month before the championships, which represented a risk factor for sustaining an injury during the championship. This study emphasises the importance of the PHQ as a screening tool to identify athletes at risk of injuries before international championships.

Place, publisher, year, edition, pages
BMJ Publishing Group, 2015
National Category
Public Health, Global Health, Social Medicine and Epidemiology
Identifiers
urn:nbn:se:liu:diva-114617 (URN)10.1136/bjsports-2014-094359 (DOI)000359750200007 ()25716152 (PubMedID)
Available from: 2015-02-27 Created: 2015-02-27 Last updated: 2017-12-04
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ORCID iD: ORCID iD iconorcid.org/0000-0001-6049-5402

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