{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,15]],"date-time":"2026-03-15T21:43:38Z","timestamp":1773611018055,"version":"3.50.1"},"reference-count":18,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2020,1,1]],"date-time":"2020-01-01T00:00:00Z","timestamp":1577836800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2020,1,1]],"date-time":"2020-01-01T00:00:00Z","timestamp":1577836800000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"},{"start":{"date-parts":[[2020,1,1]],"date-time":"2020-01-01T00:00:00Z","timestamp":1577836800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/tdm\/userlicense\/1.0\/"},{"start":{"date-parts":[[2020,1,1]],"date-time":"2020-01-01T00:00:00Z","timestamp":1577836800000},"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":[[2020,1]]},"abstract":"<jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>The purposes of this study are (1) to measure the ischiofemoral distance (IFD) in nondiseased hips and (2) to reveal patient demographic and anatomical factors associated with IFD.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>In this retrospective study, we identified patients who had unilateral osteonecrosis of the femoral head on computed tomography (CT) scan from November 2005 to July 2018 and assessed the unaffected contralateral hips of the patients. Among the contralateral hips, we excluded hips with hip pain, incomplete or poor\u2010quality CT image, incomplete medical record, degenerative arthritis of the hip, or previous hip surgery. IFD was measured on the axial CT image, and correlated demographic factors (age, sex, height, weight, and body mass index) and anatomical parameters (neck\u2013shaft angle of the femur and femoral anteversion) with IFD were evaluated.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Five hundred seventeen patients (517 hips) were evaluated. There were 302 men and 215 women, and their mean age was 51.7\u00a0years (range 15\u201083\u00a0years). The mean IFD was 33.2 (\u00b19.2) mm in men and 24.3 (\u00b18.9) mm in women (\n                      <jats:italic>P<\/jats:italic>\n                      &lt; .001). Interobserver and intraobserver reliability (intraclass correlation coefficients) were 0.99 (95% confidence interval 0.98\u20101.0) and 0.98 (95% confidence interval 0.97\u20100.99), respectively. The mean neck\u2013shaft angle was 129.31\u00b0 \u00b1 5.04\u00b0 in males and 129.93\u00b0 \u00b1 6.29\u00b0 in females. The mean femoral anteversion was 9.72\u00b0 \u00b1 7.95\u00b0 in males and 12.61\u00b0 \u00b1 8.91\u00b0 in females. IFD was positively correlated with height (correlation coefficient [\n                      <jats:italic>r<\/jats:italic>\n                      ]\u00a0=\u00a00.464,\n                      <jats:italic>P<\/jats:italic>\n                      &lt; .001) and weight (0.286,\n                      <jats:italic>P<\/jats:italic>\n                      &lt; .001), whereas it was negatively correlated with age (\u20130.198,\n                      <jats:italic>P<\/jats:italic>\n                      &lt; .001), neck\u2013shaft angle (\u20130.123,\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0= .005), and femoral anteversion (\u20130.346,\n                      <jats:italic>P<\/jats:italic>\n                      &lt; .001). There was no correlation between body mass index and IFD (\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0= .522). In multivariate regression analysis, IFD was positively associated with height (\u03b2\u00a0=\u00a0.632), and negatively associated with neck\u2013shaft angle of the femur and femoral anteversion (\u03b2\u00a0= \u20130.155 and \u20130.328. respectively).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>In asymptomatic hips, the mean IFD was 33.2 \u00b1 9.2\u00a0mm in males and 24.3 \u00b1\u00a08.9\u00a0mm in females. The IFD was positively correlated with height and negatively with neck\u2013shaft angle of the femur and femoral anteversion.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Level of evidence<\/jats:title>\n                    <jats:p>Level III, retrospective comparative study.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1016\/j.arthro.2019.08.013","type":"journal-article","created":{"date-parts":[[2019,12,18]],"date-time":"2019-12-18T01:59:40Z","timestamp":1576634380000},"page":"150-155","update-policy":"https:\/\/doi.org\/10.1016\/elsevier_cm_policy","source":"Crossref","is-referenced-by-count":16,"title":["Normal Ischiofemoral Distance and Its Associated Factors: Computed Tomography\u2013Based Study"],"prefix":"10.1002","volume":"36","author":[{"given":"Heejae","family":"Won","sequence":"first","affiliation":[{"name":"Department of Orthopedic Surgery Seoul National University Bundang Hospital Seongnam Gyeonggido South Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Young\u2010Kyun","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery Seoul National University Bundang Hospital Seongnam Gyeonggido South Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Beom\u2010Seok","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery Gwangmyeong Sungae Hospital Gwangmyeong Gyeonggido South Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jung Wee","family":"Park","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery Seoul National University Bundang Hospital Seongnam Gyeonggido South Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Seokhyung","family":"Won","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery Seoul National University Bundang Hospital Seongnam Gyeonggido South Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kyung\u2010Hoi","family":"Koo","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery Seoul National University Bundang Hospital Seongnam Gyeonggido South Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2020,1,1]]},"reference":[{"key":"e_1_2_6_2_2","doi-asserted-by":"publisher","DOI":"10.2106\/00004623-197759020-00028"},{"key":"e_1_2_6_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.arthro.2017.08.260"},{"key":"e_1_2_6_4_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-016-4036-y"},{"key":"e_1_2_6_5_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00256-011-1257-5"},{"key":"e_1_2_6_6_2","doi-asserted-by":"publisher","DOI":"10.1590\/1413-785220162406162686"},{"key":"e_1_2_6_7_2","doi-asserted-by":"publisher","DOI":"10.2214\/AJR.08.2090"},{"key":"e_1_2_6_8_2","doi-asserted-by":"publisher","DOI":"10.1093\/jhps\/hnw003"},{"key":"e_1_2_6_9_2","doi-asserted-by":"publisher","DOI":"10.1007\/s11999-012-2460-y"},{"key":"e_1_2_6_10_2","doi-asserted-by":"publisher","DOI":"10.1097\/00004728-199807000-00019"},{"key":"e_1_2_6_11_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00256-008-0551-3"},{"key":"e_1_2_6_12_2","doi-asserted-by":"publisher","DOI":"10.4055\/cios.2017.9.4.529"},{"key":"e_1_2_6_13_2","doi-asserted-by":"publisher","DOI":"10.12659\/PJR.894523"},{"key":"e_1_2_6_14_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00256-014-2041-0"},{"key":"e_1_2_6_15_2","first-page":"410","article-title":"A\u00a0MRI study of the lesser trochanteric version and its relationship to proximal femoral osseous anatomy","volume":"2","author":"Schroder R.G.","year":"2015","journal-title":"Journal of hip preservation surgery"},{"key":"e_1_2_6_16_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00276-012-1029-5"},{"key":"e_1_2_6_17_2","unstructured":"Avg Height.Average height by country in 2016. 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