title: A systematic review of determinants of sedentary behaviour in youth: a DEDIPAC-study.
abstract: Sedentary behaviour (SB) has emerged as a potential risk factor for metabolic health in youth. Knowledge on the determinants of SB in youth is necessary to inform future intervention development to reduce SB. A systematic review was conducted to identify predictors and determinants of SB in youth. Pubmed, Embase, CINAHL, PsycINFO and Web of Science were searched, limiting to articles in English, published between January 2000 and May 2014. The search strategy was based on four key elements and their synonyms: (a) sedentary behaviour, (b) determinants, (c) types of sedentary behaviours, (d) types of determinants. The full protocol is available from PROSPERO (PROSPERO 2014:CRD42014009823). Cross-sectional studies were excluded. The analysis was guided by the socio-ecological model. 37 studies were selected out of 2654 identified papers from the systematic literature search. Most studies were conducted in Europe (n = 13), USA (n = 11), and Australia (n = 10). The study quality, using the Qualsyst tool, was high with a median of 82% (IQR: 74-91%). Multiple potential determinants were studied in only one or two studies. Determinants were found at the individual, interpersonal, environmental and policy level but few studies examined a comprehensive set of factors at different levels of influences. Evidence was found for age being positively associated with total SB, and weight status and baseline assessment of screen time being positively associated with screen time (at follow-up). A higher playground density and a higher availability of play and sports equipment at school were consistently related to an increased total SB, although these consistent findings come from single studies. Evidence was also reported for the presence of safe places to cross roads and lengthening morning and lunch breaks being associated with less total SB. Future interventions to decrease SB levels should especially target children with overweight or obesity and should start at a young age. However, since the relationship of many determinants with SB remains inconsistent, there is still a need for more longitudinal research on determinants of SB in youth.
authors.affiliation: Institute of Epidemiology and Medical Biometry, Ulm University, Ulm, Germany. annabel.stierlin@uni-ulm.de.|Section Health Economics and Health Services Research, Department of Psychiatry II, Ulm University, Bezirkskrankenhaus Günzburg, Ulm, Germany. annabel.stierlin@uni-ulm.de.
authors.forename: Annabel S
authors.initials: AS
authors.lastname: Stierlin
authors.affiliation: Department of Movement and Sports Sciences, Ghent University, Ghent, Belgium. sara.delepeleere@ugent.be.
authors.forename: Sara
authors.initials: S
authors.lastname: De Lepeleere
authors.affiliation: Department of Movement and Sports Sciences, Ghent University, Ghent, Belgium. greet.cardon@ugent.be.
authors.forename: Greet
authors.initials: G
authors.lastname: Cardon
authors.affiliation: Univ Paris Descartes, UMRS 1153, F-94807, Villejuif, France. patricia.dargent@inserm.fr.|Inserm U1153, ORCHARD, Centre de Recherche Epidémiologie et Statistique Sorbonne Paris Cité (CRESS), Villejuif, F-94807, France. patricia.dargent@inserm.fr.
authors.forename: Patricia
authors.initials: P
authors.lastname: Dargent-Molina
authors.affiliation: Division of Sports and Rehabilitation Medicine, Department of Medicine II, Ulm University, Ulm, Germany. belinda.hoffmann@uni-ulm.de.
authors.forename: Belinda
authors.initials: B
authors.lastname: Hoffmann
authors.affiliation: Sport and Exercise Sciences Research Institute, University of Ulster, Northern Ireland, UK. mh.murphy@ulster.ac.uk.
authors.forename: Marie H
authors.initials: MH
authors.lastname: Murphy
authors.affiliation: Centre for Preventive Medicine, Dublin City University, Dublin, Ireland. aileen.m.kennedy@dcu.ie.
authors.forename: Aileen
authors.initials: A
authors.lastname: Kennedy
authors.affiliation: Centre for Preventive Medicine, Dublin City University, Dublin, Ireland. grainne.odonoghue@dcu.ie.
authors.forename: Grainne
authors.initials: G
authors.lastname: O'Donoghue
authors.affiliation: Institute of Applied Health Research, School of Health and Life Science, Glasgow Caledonian University, Glasgow, Scotland, UK. sebastien.chastin@gcu.ac.uk.
authors.forename: Sebastien F M
authors.initials: SF
authors.lastname: Chastin
authors.affiliation: Department of Movement and Sports Sciences, Ghent University, Ghent, Belgium. marieke.decraemer@ugent.be.
authors.forename: Marieke
authors.initials: M
authors.lastname: De Craemer
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior; D001835:Body Weight; D002648:Child; D002652:Child Behavior; D004777:Environment; D015444:Exercise; D015438:Health Behavior; D006801:Humans; D057185:Sedentary Behavior; D064890:Social Determinants of Health; D012931:Social Environment