{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,8,31]],"date-time":"2025-08-31T18:10:07Z","timestamp":1756663807138,"version":"3.44.0"},"reference-count":24,"publisher":"BMJ","issue":"1","license":[{"start":{"date-parts":[[2020,8,26]],"date-time":"2020-08-26T00:00:00Z","timestamp":1598400000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"funder":[{"name":"Finnish Ministry of Education and Culture"},{"name":"Ministry of Social Affairs and Health"}],"content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Open Sport Exerc Med"],"accepted":{"date-parts":[[2020,8,19]]},"published-print":{"date-parts":[[2020,9]]},"abstract":"<jats:sec id=\"s1\">\n                  <jats:title>Objectives<\/jats:title>\n                  <jats:p>To compare laboratory test results and lung function of adolescent organised sports participants (SP) with non-participants (NP).<\/jats:p>\n               <\/jats:sec>\n               <jats:sec id=\"s2\">\n                  <jats:title>Methods<\/jats:title>\n                  <jats:p>In this cross-sectional study, laboratory tests (haemoglobin, iron status), and flow-volume spirometry were performed on SP youths (199 boys, 203 girls) and their NP peers (62 boys, 114 girls) aged 14\u201317.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec id=\"s3\">\n                  <jats:title>Results<\/jats:title>\n                  <jats:p>Haemoglobin concentration &lt;120\/130\u00a0g\/L was found in 5.8% of SP and 5.1% NP (OR 1.20, 95% CI 0.54 to 2.68). Ferritin concentration below 15\u00a0\u00b5g\/L was found in 22.7% of both SP and NP girls. Among boys ferritin &lt;30\u00a0\u00b5g\/L was found in 26.5% of SP and 30.2% of NP (OR 0.76, 95% CI 0.40 to 1.47). Among SP iron supplement use was reported by 3.5% of girls and 1.5% of boys. In flow-volume spirometry with bronchodilation test, 7.0% of SP and 6.4% of NP had asthma-like findings (OR 1.17, 95% CI 0.54 to 2.54); those using asthma medication, that is, 9.8% of SP and 5.2% of NP were excluded from the analysis.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec id=\"s4\">\n                  <jats:title>Conclusions<\/jats:title>\n                  <jats:p>Screening for iron deficiency is recommended for symptomatic persons and persons engaging in sports. Lung function testing is recommended for symptomatic persons and persons participating in sports in which asthma is more prevalent.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1136\/bmjsem-2020-000804","type":"journal-article","created":{"date-parts":[[2020,9,5]],"date-time":"2020-09-05T07:20:13Z","timestamp":1599290413000},"page":"e000804","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":3,"title":["Haemoglobin, iron status and lung function of adolescents participating in organised sports in the Finnish Health Promoting Sports Club Study"],"prefix":"10.1136","volume":"6","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4573-1937","authenticated-orcid":false,"given":"Kerttu","family":"Toivo","sequence":"first","affiliation":[{"name":"Tampere Research Center of Sports Medicine, Ukk Institute, Tampere, Finland"},{"name":"Ukk Institute for Health Promotion Research, Tampere, Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Pekka","family":"Kannus","sequence":"additional","affiliation":[{"name":"Tampere Research Center of Sports Medicine, Ukk Institute, Tampere, Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sami","family":"Kokko","sequence":"additional","affiliation":[{"name":"Faculty of Sport and Health Sciences, University of Jyvaskyla, Jyvaskyla, Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lauri","family":"Alanko","sequence":"additional","affiliation":[{"name":"Clinic for Sports and Exercise Medicine, Helsingin Yliopisto, Helsinki, Finland"},{"name":"Department of Sports and Exercise Medicine, Central Finland Central Hospital, Jyvaskyla, Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Olli J","family":"Heinonen","sequence":"additional","affiliation":[{"name":"Paavo Nurmi Centre & Unit for Health and Physical Activity, University of Turku, Turku, Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Raija","family":"Korpelainen","sequence":"additional","affiliation":[{"name":"Department of Sports and Exercise Clinic, Oulu Deaconess Foundation, Oulu, Finland"},{"name":"Center for Life Course Health Research, University of Oulu, Oulu, Finland"},{"name":"Medical Research Center, University of Oulu and University Hospital of Oulu, Oulu, Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kai","family":"Savonen","sequence":"additional","affiliation":[{"name":"Kuopio Research Institute of Exercise Medicine, Kuopio, Finland"},{"name":"Department of Clinical Physiology and Nuclear Medicine, Kuopio University Hospital, Kuopio, Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Harri","family":"Sel\u00e4nne","sequence":"additional","affiliation":[{"name":"Department of Psychology, University of Jyv\u00e4skyl\u00e4, Jyvaskyla, Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tommi","family":"Vasankari","sequence":"additional","affiliation":[{"name":"Ukk Institute for Health Promotion Research, Tampere, Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lasse","family":"Kannas","sequence":"additional","affiliation":[{"name":"Faculty of Sport and Health Sciences, University of Jyvaskyla, Jyvaskyla, Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Urho M","family":"Kujala","sequence":"additional","affiliation":[{"name":"Faculty of Sport and Health Sciences, University of Jyvaskyla, Jyvaskyla, Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jari","family":"Villberg","sequence":"additional","affiliation":[{"name":"Faculty of Sport and Health Sciences, University of Jyvaskyla, Jyvaskyla, 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