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A 1:1 case\u2010matching query using preoperative modified Harris Hip Score (mHHS) within 3 points, body mass index (BMI) within 3 points, age within 5 years, and sex identified a control cohort without spinal pathology. Follow\u2010up patient\u2010reported outcomes (PROs) and clinical failure rates to revision procedure were compared using analysis of variance (ANOVA) and Kaplan\u2010Meier survival analysis.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Twenty\u2010six patients met criteria of the hip\u2010spine group (age: 45.9 \u00b1 12.2 years; BMI: 27.3 \u00b1 5.0 kg\/m\n                      <jats:sup>2<\/jats:sup>\n                      , baseline mHHS: 44.17 \u00b1 2.76) vs the control group (age: 46.2 \u00b1 12.4 years,\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0= .94; BMI: 26.7 \u00b1 4.1 kg\/m\n                      <jats:sup>2<\/jats:sup>\n                      ,\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0= .61; baseline mHHS: 44.27 \u00b1 2.82,\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0=\u00a0.98). ANOVA analysis demonstrated that all PROs improved from baseline to 2\u2010year outcomes (\n                      <jats:italic>P<\/jats:italic>\n                      &lt; .001). The hip\u2010spine vs control group had lower 1\u2010year (mHHS: 65.97 \u00b1 5.64 vs 85.04 \u00b1 3.09,\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0= .006; nonarthritic hip score (NAHS): 70.26 \u00b1 5.71 vs 87.89 \u00b1 2.65,\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0= .010) and 2\u2010year (mHHS: 69.72 \u00b1 4.92 vs 84.71 \u00b1 2.56,\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0= .007; NAHS: 72.23 \u00b1 5.18 vs 87.14 \u00b1 2.23,\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0= .008) outcomes. While there was no difference in patient acceptable symptomatic state (PASS) and minimal clinically important difference (MCID) rates at 1\u2010year follow\u2010up, the hip\u2010spine group demonstrated lower PASS (42% vs 81%,\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0= .004) and MCID (58% vs 88%,\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0= .027) rates at 2 years. Although susceptible to type II error, there was no difference in clinical failure rates to revision procedure (\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0= .13).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>While net PROs from baseline improve after hip arthroscopy for FAI, the presence of concomitant lumbar spinal stenosis negatively affects postoperative PROs. FAI patients with spinal stenosis should be counseled accordingly.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Level of Evidence<\/jats:title>\n                    <jats:p>Level III, case\u2010control study.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1016\/j.arthro.2021.01.068","type":"journal-article","created":{"date-parts":[[2021,2,10]],"date-time":"2021-02-10T12:04:45Z","timestamp":1612958685000},"page":"2102-2109","update-policy":"https:\/\/doi.org\/10.1016\/elsevier_cm_policy","source":"Crossref","is-referenced-by-count":19,"title":["Concomitant Lumbar Spinal Stenosis Negatively Affects Outcomes After Hip Arthroscopy for Femoroacetabular Impingement"],"prefix":"10.1002","volume":"37","author":[{"given":"Berkcan","family":"Akpinar","sequence":"first","affiliation":[{"name":"NYU Langone Orthopedic Hospital New York New York U.S.A."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lawrence 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