{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,17]],"date-time":"2026-10-17T21:03:15Z","timestamp":1792270995455,"version":"4.4.0"},"reference-count":22,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2013,1,28]],"date-time":"2013-01-28T00:00:00Z","timestamp":1359331200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2013,1,28]],"date-time":"2013-01-28T00:00:00Z","timestamp":1359331200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"},{"start":{"date-parts":[[2013,1,28]],"date-time":"2013-01-28T00:00:00Z","timestamp":1359331200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/tdm\/userlicense\/1.0\/"},{"start":{"date-parts":[[2013,1,28]],"date-time":"2013-01-28T00:00:00Z","timestamp":1359331200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/legal\/tdmrep-license"}],"content-domain":{"domain":["arthroscopyjournal.org","clinicalkey.com","clinicalkey.com.au","clinicalkey.es","clinicalkey.fr","clinicalkey.jp","elsevier.com","sciencedirect.com"],"crossmark-restriction":true},"short-container-title":["Arthroscopy"],"published-print":{"date-parts":[[2013,3]]},"abstract":"<jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>The first purpose was to evaluate radiographic pathomorphology\/abnormalities in a cohort of high\u2010level collegiate football players screened with hip radiographs. The second purpose was to define the radiographic predictors of athletic\u2010related \u201chip\u201d and \u201cgroin\u201d symptoms in this cohort of high\u2010level athletes.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>The study population included all male collegiate football players undergoing evaluation and hip radiography at the National Football League (NFL) Scouting Combine in 2009 and 2010. All radiographs were evaluated with a detailed evaluation for hip pathomorphology. Symptoms were recorded as symptomatic or asymptomatic with respect to athletic\u2010related groin\/hip pain for comparative purposes.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      There were 125 players (239 hips) who had hip radiographs and were included in the final cohort. Ninety percent of players (87% of hips) in this cohort had at least 1 finding consistent with cam\u2010type and\/or pincer\u2010type femoroacetabular impingement (FAI). There were 75 hips in the symptomatic group and 164 hips in the asymptomatic group. Although the symptomatic group had a greater prevalence of cam\u2010type FAI (\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0= .009), combined\u2010type FAI (\n                      <jats:italic>P<\/jats:italic>\n                      &lt; .001), and osteitis pubis (\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0= .014), increasing alpha angle (larger cam deformities) was the only independent predictor of athletic\u2010related groin pain (\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0= .01). There was no correlation, however, between FAI and body mass index (\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0= .659), player position (\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0= .166), or whether a player was drafted by an NFL team (\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0= .430).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Radiographic signs of FAI were frequently seen in collegiate NFL prospects who were screened with hip radiographs. Although patients with radiographic evidence of osteitis pubis, cam\u2010 and combined\u2010type FAI, and larger cam deformities showed a statistically higher prevalence of symptoms, increasing alpha angle (larger cam deformity) was the only independent predictor of athletic\u2010related hip\/groin pain.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Level of Evidence<\/jats:title>\n                    <jats:p>Level IV, therapeutic case series.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1016\/j.arthro.2012.10.024","type":"journal-article","created":{"date-parts":[[2013,1,26]],"date-time":"2013-01-26T06:48:47Z","timestamp":1359182927000},"page":"405-410","update-policy":"https:\/\/doi.org\/10.1016\/elsevier_cm_policy","source":"Crossref","is-referenced-by-count":126,"title":["Increasing Alpha Angle is Predictive of Athletic\u2010Related \u201cHip\u201d and \u201cGroin\u201d Pain in Collegiate National Football League Prospects"],"prefix":"10.1002","volume":"29","author":[{"given":"Christopher M.","family":"Larson","sequence":"first","affiliation":[{"name":"Minnesota Orthopedic Sports Medicine Institute at Twin Cities Orthopedics Edina Minnesota U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Robby S.","family":"Sikka","sequence":"additional","affiliation":[{"name":"TRIA Orthopaedic Center Bloomington Minnesota U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Matthew C.","family":"Sardelli","sequence":"additional","affiliation":[{"name":"Family Orthopedic Associates Flint Michigan U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J.W. Thomas","family":"Byrd","sequence":"additional","affiliation":[{"name":"Nashville Sports Medicine &amp; Orthopaedic Center Nashville Tennessee U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bryan T.","family":"Kelly","sequence":"additional","affiliation":[{"name":"New York\u2010Presbyterian Hospital\/Weill Cornell Medical College and Hospital for Special Surgery New York New York U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rahul K.","family":"Jain","sequence":"additional","affiliation":[{"name":"TRIA Orthopaedic Center Bloomington Minnesota U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M. Russell","family":"Giveans","sequence":"additional","affiliation":[{"name":"Minnesota Orthopedic Sports Medicine Institute at Twin Cities Orthopedics Edina Minnesota U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2013,1,28]]},"reference":[{"key":"e_1_2_2_2_1","doi-asserted-by":"publisher","DOI":"10.1177\/0363546507304141"},{"key":"e_1_2_2_3_1","first-page":"701","article-title":"Hip arthroscopy in athletes","volume":"52","author":"Byrd J.W.","year":"2003","journal-title":"Instr Course Lect"},{"key":"e_1_2_2_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.arthro.2005.02.016"},{"key":"e_1_2_2_5_1","doi-asserted-by":"publisher","DOI":"10.1177\/03635465030310060701"},{"key":"e_1_2_2_6_1","doi-asserted-by":"publisher","DOI":"10.1177\/0363546509346393"},{"key":"e_1_2_2_7_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-007-0332-x"},{"key":"e_1_2_2_8_1","doi-asserted-by":"publisher","DOI":"10.1136\/bjsm.2009.060434"},{"key":"e_1_2_2_9_1","doi-asserted-by":"publisher","DOI":"10.2106\/JBJS.H.01674"},{"key":"e_1_2_2_10_1","doi-asserted-by":"publisher","DOI":"10.1080\/02841850801935567"},{"key":"e_1_2_2_11_1","doi-asserted-by":"publisher","DOI":"10.1177\/0363546509358320"},{"key":"e_1_2_2_12_1","doi-asserted-by":"publisher","DOI":"10.1007\/s11999-010-1233-8"},{"key":"e_1_2_2_13_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00264-009-0742-0"},{"key":"e_1_2_2_14_1","doi-asserted-by":"publisher","DOI":"10.2106\/JBJS.J.01280"},{"key":"e_1_2_2_15_1","doi-asserted-by":"publisher","DOI":"10.2106\/JBJS.K.00544"},{"key":"e_1_2_2_16_1","doi-asserted-by":"publisher","DOI":"10.1177\/0363546511432711"},{"key":"e_1_2_2_17_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.arthro.2012.03.005"},{"key":"e_1_2_2_18_1","doi-asserted-by":"publisher","DOI":"10.2106\/JBJS.H.00756"},{"key":"e_1_2_2_19_1","doi-asserted-by":"publisher","DOI":"10.1097\/JSA.0b013e3181dc652e"},{"key":"e_1_2_2_20_1","doi-asserted-by":"publisher","DOI":"10.1302\/0301-620X.84B4.0840556"},{"key":"e_1_2_2_21_1","first-page":"39","article-title":"Normal values of the hip joint for the evaluation of x\u2010rays in children and adults","author":"T\u00f6nnis D.","year":"1976","journal-title":"Clin Orthop Relat Res"},{"key":"e_1_2_2_22_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jsams.2006.11.006"},{"key":"e_1_2_2_23_1","doi-asserted-by":"publisher","DOI":"10.1016\/S1440-2440(05)80027-1"}],"container-title":["Arthroscopy"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0749806312017914?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0749806312017914?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/arthroscopyjournals.onlinelibrary.wiley.com\/doi\/pdf\/10.1016\/j.arthro.2012.10.024","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/arthroscopyjournals.onlinelibrary.wiley.com\/doi\/full-xml\/10.1016\/j.arthro.2012.10.024","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/arthroscopyjournals.onlinelibrary.wiley.com\/doi\/pdf\/10.1016\/j.arthro.2012.10.024","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,3,15]],"date-time":"2026-03-15T08:36:57Z","timestamp":1773563817000},"score":1,"resource":{"primary":{"URL":"https:\/\/arthroscopyjournals.onlinelibrary.wiley.com\/doi\/10.1016\/j.arthro.2012.10.024"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2013,1,28]]},"references-count":22,"journal-issue":{"issue":"3","published-print":{"date-parts":[[2013,3]]}},"alternative-id":["10.1016\/j.arthro.2012.10.024"],"URL":"https:\/\/doi.org\/10.1016\/j.arthro.2012.10.024","archive":["Portico"],"relation":{},"ISSN":["0749-8063","1526-3231"],"issn-type":[{"value":"0749-8063","type":"print"},{"value":"1526-3231","type":"electronic"}],"subject":[],"published":{"date-parts":[[2013,1,28]]},"assertion":[{"value":"Elsevier","name":"publisher","label":"This article is maintained by"},{"value":"Increasing Alpha Angle is Predictive of Athletic-Related \u201cHip\u201d and \u201cGroin\u201d Pain in Collegiate National Football League Prospects","name":"articletitle","label":"Article Title"},{"value":"Arthroscopy: The Journal of Arthroscopic & Related Surgery","name":"journaltitle","label":"Journal Title"},{"value":"https:\/\/doi.org\/10.1016\/j.arthro.2012.10.024","name":"articlelink","label":"CrossRef DOI link to publisher maintained version"},{"value":"article","name":"content_type","label":"Content Type"},{"value":"Copyright \u00a9 2013 Arthroscopy Association of North America. 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