en Gamma Knife Radiosurgery Research <p style="text-align: justify;"><strong>Background & Aim: </strong>To assess functionality status and surgical outcome of fenestration versus laminotomy technique based on Core Outcome Measures Index (COMI) in patients with lumbar disc hernia (LDH).</p> <p style="text-align: justify;"><strong>Methods & Materials/Patients:</strong> A cross-sectional study was performed between January 2007 and April 2012. A total of 108 patients with a single-level disc herniation were asked to respond to the Oswestry Disabiltiy Index (ODI) and COMI at two points in time: pre- and post-operative assessments. The ODI and COMI were assessed comparing patients&rsquo; pre- and postoperative scores to determine the functionality status and surgical outcome.</p> <p style="text-align: justify;"><strong>Results: </strong>The mean age of patients was 52.4 (SD=10.1) years who underwent fenestration (n=45) or laminotomy discectomy (n=63). The mean clinical follow-up was 27.8 (SD=3.6) months (range 24 - 37 months). Regarding COMI scores, all subgroup values showed statistical significance pre- and postoperative indicating improvements on the outcomes and functionality. The change in the ODI after surgery was strongly correlated with change in the COMI, (r=0.79; P<0.001). The ODI score also was found to be statistically different between the groups in pre-and postoperative (P<0.001) assessment. However, the functionality status rate was similar in both groups.</p> <p style="text-align: justify;"><strong>Conclusion:</strong> The findings suggest that fenestration or laminotomy discectomy is an efficacious procedure for treatment of LDH. However, both methods are equally effective in surgical outcome.</p>  Functional, Pain, COMI, Lumbar disc hernia  23 27 http://irjns.org/browse.php?a_code=A-10-100-12&slc_lang=en&sid=1 Parisa Azimi پریسا عظیمی 10031947532846002493 10031947532846002493 Yes Hassan-Reza Mohammadi حسن رضا محمدی 10031947532846002494 10031947532846002494 No Hossein Nayeb-Aghaei حسین نائب آقایی 10031947532846002495 10031947532846002495 No Shirzad Azhari شیرزاد آژاری 10031947532846002496 10031947532846002496 No Hossein Safdari-Ghandehari حسین صفدری-قندهاری 10031947532846002497 10031947532846002497 No Sohrab Sadeghi سهراب صادقی 10031947532846002498 10031947532846002498 No