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Sample size mainly depends on the expected effect of the risk factor on injury risk, and to detect moderate to strong associations 20\u201350 injury cases are needed, whereas small to moderate associations would need about 200 injured subjects. Studies published to date on the risk factors for hamstring strains have methodological limitations, and are too small to detect small to moderate associations.<\/jats:p>","DOI":"10.1136\/bjsm.37.5.384","type":"journal-article","created":{"date-parts":[[2003,9,26]],"date-time":"2003-09-26T22:17:13Z","timestamp":1064614633000},"page":"384-392","source":"Crossref","is-referenced-by-count":708,"title":["Risk factors for sports injuries \u2014 a methodological approach"],"prefix":"10.1136","volume":"37","author":[{"given":"R","family":"Bahr","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"I","family":"Holme","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"239","published-online":{"date-parts":[[2003,9,26]]},"reference":[{"key":"2024051401111025000_37.5.384.1","doi-asserted-by":"publisher","DOI":"10.1001\/jama.1995.03520290054029"},{"key":"2024051401111025000_37.5.384.2","doi-asserted-by":"publisher","DOI":"10.1161\/01.CIR.94.4.857"},{"key":"2024051401111025000_37.5.384.3","doi-asserted-by":"publisher","DOI":"10.1001\/jama.1996.03540070018010"},{"key":"2024051401111025000_37.5.384.4","doi-asserted-by":"crossref","first-page":"282","DOI":"10.1177\/140349489602400409","volume":"24","year":"1996","journal-title":"Scand J Soc Med"},{"key":"2024051401111025000_37.5.384.5","doi-asserted-by":"publisher","DOI":"10.1136\/bjsm.30.1.64"},{"key":"2024051401111025000_37.5.384.6","doi-asserted-by":"publisher","DOI":"10.1055\/s-2007-1024765"},{"key":"2024051401111025000_37.5.384.7","doi-asserted-by":"publisher","DOI":"10.1177\/036354659502300611"},{"key":"2024051401111025000_37.5.384.8","doi-asserted-by":"crossref","first-page":"149","DOI":"10.1111\/j.1600-0838.1998.tb00185.x","volume":"8","year":"1998","journal-title":"Scand J Med Sci Sports"},{"key":"2024051401111025000_37.5.384.9","doi-asserted-by":"publisher","DOI":"10.2165\/00007256-199928010-00004"},{"key":"2024051401111025000_37.5.384.10","unstructured":"Myklebust G, Holm I, Maehlum S, et al. 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