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Exclusion criteria was dysplasia, age &lt;18 years, previous hip conditions\/surgeries, and bilaterally operated patients with OA on one side only. Survival was estimated by Kaplan\u2013Meier analysis for levels of sex, age groups and T\u00f6nnis. Cox proportional hazards model estimated hazard ratios (HR) of undergoing THA conversion. Where THA was avoided, outcomes and proportion of cases achieving patient acceptable symptomatic state was determined<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      53 OA hips were matched with 53 control hips. Survival distributions were significantly different for: (1) Group: OA 57.1%, control 87.0% (\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0= .001); (2) T\u00f6nnis grade: T\u00f6nnis 0, 89.2%; T\u00f6nnis 1, 77.8%; T\u00f6nnis 2, 67.6%; T\u00f6nnis 3, 25.0% (\n                      <jats:italic>P<\/jats:italic>\n                      &lt; .001); and (3) age: (OA: 75.0% vs 44.8%, control: 100%, vs 75.0%, for &lt;35 and &gt;35 years respectively) (\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0= .002). Conversion to THA was greater for increasing T\u00f6nnis: HR 1.9 (\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0= .450), 3.5 (\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0= .032), and 11.0 (\n                      <jats:italic>P<\/jats:italic>\n                      &lt; .001) for T\u00f6nnis 1, 2, and 3 respectively, relative to no OA (T\u00f6nnis 0) and &gt;35 years: HR 4.3 (95% confidence interval 1.6\u201011.3,\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0= .003). Patient acceptable symptomatic state achievement was similar for both groups (78% OA vs 91% control,\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0= .167). modified Harris Hip Score and Short Form\u201036 significantly improved within both groups from baseline to 10 years\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Arthroscopic correction of femoroacetabular impingement, in the presence of advanced OA results in 57% survivorship at 10 years (68% T\u00f6nnis 2, 25% T\u00f6nnis 3). Where THA was avoided, 78% considered their 10\u2010year post\u2010HA state to be satisfactory, with patient\u2010reported outcomes similar to a matched non\u2010OA cohort. T\u00f6nnis 2 in particular should be considered for arthroscopic hip preservation to avoid the need to prematurely replace the hip joint.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Level of Evidence<\/jats:title>\n                    <jats:p>IV, case series.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1016\/j.arthro.2022.07.022","type":"journal-article","created":{"date-parts":[[2022,8,19]],"date-time":"2022-08-19T09:38:23Z","timestamp":1660901903000},"page":"256-268","update-policy":"https:\/\/doi.org\/10.1016\/elsevier_cm_policy","source":"Crossref","is-referenced-by-count":20,"title":["Hip Arthroscopy in the Presence of Advanced Osteoarthritis Results in 57% Survivorship, With 78% Survivor Satisfaction, at 10 Years. 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