{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,3]],"date-time":"2026-06-03T11:32:11Z","timestamp":1780486331015,"version":"3.54.1"},"reference-count":30,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2017,10,10]],"date-time":"2017-10-10T00:00:00Z","timestamp":1507593600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"name":"Federation Internationale de Football Association (FIFA)"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Scandinavian Med Sci Sports"],"published-print":{"date-parts":[[2018,3]]},"abstract":"<jats:p>Football (soccer) is very popular among children. Little is known about risk factors for football injuries in children. The aim was to analyze potential injury risk factors in 7\u2010 to 12\u2010year\u2010old players. We collected prospective data in Switzerland and the Czech Republic over two seasons. Coaches reported exposure of players (in hours), absence, and injury data via an Internet\u2010based registration system. We analyzed time\u2010to\u2010injury data with extended Cox models accounting for correlations on team\u2010 and intra\u2010person levels. We analyzed injury risk in relation to age, sex, playing position, preferred foot, and regarding age\u2010independent body height, body mass, and <jats:styled-content style=\"fixed-case\">BMI<\/jats:styled-content>. Further, we analyzed injury risk in relation to playing surface. In total, 6038 player seasons with 395\u00a0295\u00a0hours of football exposure were recorded and 417 injuries occurred. Injury risk increased by 46% (Hazard Ratio 1.46 [1.35; 1.58]; <jats:italic>P<\/jats:italic>\u00a0&lt;\u00a0.001) per year of life. Left\u2010footed players had a higher injury risk (Hazard Ratio 1.53 [1.07; 2.19]; <jats:italic>P<\/jats:italic>\u00a0=\u00a0.02) for training injuries compared to right\u2010footed players. Injury risk was increased in age\u2010adjusted taller players (higher percentile rank). Higher match\u2010training ratios were associated with a lower risk of match injuries. Injury risk was increased on artificial turf (Rate Ratio 1.39 [1.12; 1.73]; <jats:italic>P<\/jats:italic>\u00a0&lt;\u00a0.001) and lower during indoor sessions (Rate Ratio 0.68 [0.52; 0.88]; <jats:italic>P<\/jats:italic>\u00a0&lt;\u00a0.001) compared to natural grass. Age is known as a risk factor in older players and was confirmed to be a risk factor in children's football. Playing surface and leg dominance have also been discussed previously as risk factors. Differences in injury risks in relation to sex should be investigated in the future.<\/jats:p>","DOI":"10.1111\/sms.12981","type":"journal-article","created":{"date-parts":[[2017,9,18]],"date-time":"2017-09-18T15:07:44Z","timestamp":1505747264000},"page":"1176-1182","source":"Crossref","is-referenced-by-count":39,"title":["Risk factors for football injuries in young players aged 7 to 12\u00a0years"],"prefix":"10.1111","volume":"28","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6763-0694","authenticated-orcid":false,"given":"R.","family":"R\u00f6ssler","sequence":"first","affiliation":[{"name":"Department of Sport Exercise and Health University of Basel  Basel Switzerland"},{"name":"Department of Public and Occupational Health Amsterdam Collaboration on Health and Safety in Sports VU University Medical Center  Amsterdam Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A.","family":"Junge","sequence":"additional","affiliation":[{"name":"Medical School Hamburg  Hamburg Germany"},{"name":"Swiss Concussion Center (SCC) Schulthess Clinic  Zurich Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J.","family":"Chomiak","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics 1st Faculty of Medicine of Charles University and Hospital Na Bulovce FIFA \u2013 Medical Centre of Excellence  Prague Czech Republic"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"K.","family":"N\u011bmec","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics 1st Faculty of Medicine of Charles University and Hospital Na Bulovce FIFA \u2013 Medical Centre of Excellence  Prague Czech Republic"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J.","family":"Dvorak","sequence":"additional","affiliation":[{"name":"Swiss Concussion Center (SCC) Schulthess Clinic  Zurich Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"E.","family":"Lichtenstein","sequence":"additional","affiliation":[{"name":"Department of Sport Exercise and Health University of Basel  Basel Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"O.","family":"Faude","sequence":"additional","affiliation":[{"name":"Department of Sport Exercise and Health University of Basel  Basel Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2017,10,10]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1159\/000342684"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-0838.2009.01087.x"},{"key":"e_1_2_7_4_1","volume-title":"FIFA Big Count 2006: 270 Million People Active in Football","author":"FIFA Communications Division","year":"2007"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00103-007-0233-7"},{"key":"e_1_2_7_6_1","doi-asserted-by":"publisher","DOI":"10.1136\/ip.9.2.117"},{"key":"e_1_2_7_7_1","doi-asserted-by":"publisher","DOI":"10.1097\/00042752-200307000-00011"},{"key":"e_1_2_7_8_1","doi-asserted-by":"publisher","DOI":"10.1007\/s40279-014-0234-2"},{"key":"e_1_2_7_9_1","doi-asserted-by":"publisher","DOI":"10.2165\/00007256-199214020-00002"},{"key":"e_1_2_7_10_1","doi-asserted-by":"publisher","DOI":"10.1007\/s40279-013-0061-x"},{"key":"e_1_2_7_11_1","doi-asserted-by":"publisher","DOI":"10.1177\/0363546515614816"},{"key":"e_1_2_7_12_1","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pmed.0040297"},{"key":"e_1_2_7_13_1","doi-asserted-by":"publisher","DOI":"10.1177\/0363546505279576"},{"key":"e_1_2_7_14_1","doi-asserted-by":"publisher","DOI":"10.1177\/0363546506288018"},{"key":"e_1_2_7_15_1","doi-asserted-by":"publisher","DOI":"10.1136\/bjsm.2007.036665"},{"key":"e_1_2_7_16_1","doi-asserted-by":"publisher","DOI":"10.1007\/s001120170107"},{"key":"e_1_2_7_17_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0197-2456(00)00104-5"},{"key":"e_1_2_7_18_1","doi-asserted-by":"publisher","DOI":"10.1136\/bmj.a2469"},{"key":"e_1_2_7_19_1","unstructured":"TherneauTM.A package for survival analysis in S Version 2.38. 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