Publications by Christian Hellum
66 publications found
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Clinical Importance of Redundant Nerve Roots in Patients with Symptomatic Lumbar Spinal Stenosis: A Secondary Analysis of NORDSTEN Spinal Stenosis Trial Data
Spine (Phila Pa 1976) (in press)
DOI 10.1097/BRS.0000000000005160, PubMed 39324936 -
Responsiveness of the Oswestry Disability Index and Zurich Claudication Questionnaire in patients with lumbar spinal stenosis: evaluation of surgically treated patients from the NORDSTEN study
Eur Spine J (in press)
DOI 10.1007/s00586-024-08440-1, PubMed 39134699 -
Decompression alone or with fusion for degenerative lumbar spondylolisthesis (Nordsten-DS): five year follow-up of a randomised, multicentre, non-inferiority trial
BMJ, 386, e079771
DOI 10.1136/bmj-2024-079771, PubMed 39111800 -
Comparison of Patients Operated for Lumbar Spinal Stenosis With and Without Spondylolisthesis: A Secondary Analysis of the NORDSTEN Trials
Spine (Phila Pa 1976), 49 (19), 1332-1338
DOI 10.1097/BRS.0000000000005038, PubMed 38857371 -
Change in Lumbar Lordosis after Decompressive Surgery in Lumbar Spinal Stenosis Patients and Associations with Patient Related Outcomes 2 Years after Surgery. Radiological and Clinical Results from the NORDSTEN Spinal Stenosis Trial
Spine (Phila Pa 1976) (in press)
DOI 10.1097/BRS.0000000000005037, PubMed 38736326 -
Bacterial growth in patients with low back pain and Modic changes: protocol of a multicentre, case-control biopsy study
BMJ Open, 14 (5), e082244
DOI 10.1136/bmjopen-2023-082244, PubMed 38719329 -
Dural Sac Cross-sectional area change from preoperatively and up to 2 years after decompressive surgery for central lumbar spinal stenosis: investigation of operated levels, data from the NORDSTEN study
Eur Spine J, 33 (6), 2234-2241
DOI 10.1007/s00586-024-08251-4, PubMed 38587545 -
Preoperative fatty infiltration of paraspinal muscles assessed by MRI is associated with less improvement of leg pain 2 years after surgery for lumbar spinal stenosis
Eur Spine J, 33 (5), 1967-1978
DOI 10.1007/s00586-024-08210-z, PubMed 38528161 -
The association between lumbar lordosis preoperatively and changes in PROMs for lumbar spinal stenosis patients 2 years after spinal surgery: radiological and clinical results from the NORDSTEN-spinal stenosis trial
Eur Spine J, 33 (5), 1950-1956
DOI 10.1007/s00586-024-08137-5, PubMed 38386059 -
Do patients with lumbar spinal stenosis benefit from decompression of levels with adjacent moderate stenosis? A prospective cohort study from the NORDSTEN study
Spine J, 24 (6), 1015-1021
DOI 10.1016/j.spinee.2024.01.010, PubMed 38266826 -
Longitudinal Relationship Between Reduced Modic Change Edema and Disability and Pain in Patients With Chronic Low Back Pain
Spine (Phila Pa 1976), 48 (24), 1699-1708
DOI 10.1097/BRS.0000000000004837, PubMed 37759351 -
The Norwegian registry for spine surgery (NORspine): cohort profile
Eur Spine J, 32 (11), 3713-3730
DOI 10.1007/s00586-023-07929-5, PubMed 37718341 -
Letter to the Editor Regarding the Paper of Shukla and Colleagues on Laminectomy With Fusion is Associated With Greater Functional Improvement Compared With Laminectomy Alone for the Treatment of Degenerative Lumbar Spondylolisthesis
Spine (Phila Pa 1976), 49 (2), E17
DOI 10.1097/BRS.0000000000004800, PubMed 37589286 -
Is the presence of foraminal stenosis associated with outcome in lumbar spinal stenosis patients treated with posterior microsurgical decompression
Acta Neurochir (Wien), 165 (8), 2121-2129
DOI 10.1007/s00701-023-05693-5, PubMed 37407851 -
The Norwegian degenerative spondylolisthesis and spinal stenosis (NORDSTEN) study: study overview, organization structure and study population
Eur Spine J, 32 (12), 4162-4173
DOI 10.1007/s00586-023-07827-w, PubMed 37395780 -
Surgery in degenerative spondylolisthesis: does fusion improve outcome in subgroups? A secondary analysis from a randomized trial (NORDSTEN trial)
Spine J, 23 (11), 1613-1622
DOI 10.1016/j.spinee.2023.06.386, PubMed 37355044 -
Impact of the number of previous lumbar operations on patient-reported outcomes after surgery for lumbar spinal stenosis or lumbar disc herniation
Bone Joint J, 105-B (4), 422-430
DOI 10.1302/0301-620X.105B4.BJJ-2022-0704.R1, PubMed 36924173 -
Postoperative Dural Sac Cross-Sectional Area as an Association for Outcome After Surgery for Lumbar Spinal Stenosis: Clinical and Radiological Results From the NORDSTEN-Spinal Stenosis Trial
Spine (Phila Pa 1976), 48 (10), 688-694
DOI 10.1097/BRS.0000000000004565, PubMed 36809364 -
The association between preoperative MRI findings and clinical improvement in patients included in the NORDSTEN spinal stenosis trial
Eur Spine J, 31 (10), 2777-2785
DOI 10.1007/s00586-022-07317-5, PubMed 35930062 -
A novel MRI index for paraspinal muscle fatty infiltration: reliability and relation to pain and disability in lumbar spinal stenosis: results from a multicentre study
Eur Radiol Exp, 6 (1), 38
DOI 10.1186/s41747-022-00284-y, PubMed 35854201 -
Comparison of 3 Different Minimally Invasive Surgical Techniques for Lumbar Spinal Stenosis: A Randomized Clinical Trial
JAMA Netw Open, 5 (3), e224291
DOI 10.1001/jamanetworkopen.2022.4291, PubMed 35344046 -
Reliability of preoperative MRI findings in patients with lumbar spinal stenosis
BMC Musculoskelet Disord, 23 (1), 51
DOI 10.1186/s12891-021-04949-4, PubMed 35033042 -
Clinical and MRI findings in lumbar spinal stenosis: baseline data from the NORDSTEN study
Eur Spine J, 31 (6), 1391-1398
DOI 10.1007/s00586-021-07051-4, PubMed 34797405 -
Surgery with or without Fusion for Lumbar Spondylolisthesis. Reply
N Engl J Med, 385 (19), 1823-1824
DOI 10.1056/NEJMc2114488, PubMed 34731549 -
Decompression with or without Fusion in Degenerative Lumbar Spondylolisthesis
N Engl J Med, 385 (6), 526-538
DOI 10.1056/NEJMoa2100990, PubMed 34347953 -
Evaluation of the EQ-5D-3L and 5L versions in low back pain patients
Health Qual Life Outcomes, 19 (1), 155
DOI 10.1186/s12955-021-01792-y, PubMed 34049574 -
Oedema on STIR modified the effect of amoxicillin as treatment for chronic low back pain with Modic changes-subgroup analysis of a randomized trial
Eur Radiol, 31 (6), 4285-4297
DOI 10.1007/s00330-020-07542-w, PubMed 33247344 -
Comparative Effectiveness of Microdecompression Alone vs Decompression Plus Instrumented Fusion in Lumbar Degenerative Spondylolisthesis
JAMA Netw Open, 3 (9), e2015015
DOI 10.1001/jamanetworkopen.2020.15015, PubMed 32910195 -
Facet Arthropathy Following Disc Replacement Versus Rehabilitation: A Prospective Study With 8-Year Follow-Up
Spine (Phila Pa 1976), 45 (21), 1467-1475
DOI 10.1097/BRS.0000000000003600, PubMed 32694494 -
Comparable increases in dural sac area after three different posterior decompression techniques for lumbar spinal stenosis: radiological results from a randomized controlled trial in the NORDSTEN study
Eur Spine J, 29 (9), 2254-2261
DOI 10.1007/s00586-020-06499-0, PubMed 32556585 -
Efficacy of antibiotic treatment in patients with chronic low back pain and Modic changes (the AIM study): double blind, randomised, placebo controlled, multicentre trial
BMJ, 367, l5654
DOI 10.1136/bmj.l5654, PubMed 31619437 -
Facet arthropathy evaluation: CT or MRI?
Eur Radiol, 29 (9), 4990-4998
DOI 10.1007/s00330-019-06047-5, PubMed 30796571 -
Clinical outcome after surgery for lumbar spinal stenosis in patients with insignificant lower extremity pain. A prospective cohort study from the Norwegian registry for spine surgery
BMC Musculoskelet Disord, 20 (1), 36
DOI 10.1186/s12891-019-2407-5, PubMed 30669998 -
Follow-up score, change score or percentage change score for determining clinical important outcome following surgery? An observational study from the Norwegian registry for Spine surgery evaluating patient reported outcome measures in lumbar spinal stenosis and lumbar degenerative spondylolisthesis
BMC Musculoskelet Disord, 20 (1), 31
DOI 10.1186/s12891-018-2386-y, PubMed 30658613 -
Decompression alone versus decompression with instrumental fusion the NORDSTEN degenerative spondylolisthesis trial (NORDSTEN-DS); study protocol for a randomized controlled trial
BMC Musculoskelet Disord, 20 (1), 7
DOI 10.1186/s12891-018-2384-0, PubMed 30611229 -
Adjacent Disc Degeneration After Lumbar Total Disc Replacement or Nonoperative Treatment: A Randomized Study with 8-year Follow-up
Spine (Phila Pa 1976), 43 (24), 1695-1703
DOI 10.1097/BRS.0000000000002712, PubMed 29794581 -
Lumbar total disc replacement: predictors for long-term outcome
Eur Spine J, 27 (3), 709-718
DOI 10.1007/s00586-017-5375-1, PubMed 29103126 -
Total disc replacement versus multidisciplinary rehabilitation in patients with chronic low back pain and degenerative discs: 8-year follow-up of a randomized controlled multicenter trial
Spine J, 17 (10), 1480-1488
DOI 10.1016/j.spinee.2017.05.011, PubMed 28583869 -
Risk factors for surgical site infections among 1,772 patients operated on for lumbar disc herniation: a multicentre observational registry-based study
Acta Neurochir (Wien), 159 (6), 1113-1118
DOI 10.1007/s00701-017-3184-2, PubMed 28424918 -
Fat in the lumbar multifidus muscles - predictive value and change following disc prosthesis surgery and multidisciplinary rehabilitation in patients with chronic low back pain and degenerative disc: 2-year follow-up of a randomized trial
BMC Musculoskelet Disord, 18 (1), 145
DOI 10.1186/s12891-017-1505-5, PubMed 28376754 -
Study-protocol for a randomized controlled trial comparing clinical and radiological results after three different posterior decompression techniques for lumbar spinal stenosis: the Spinal Stenosis Trial (SST) (part of the NORDSTEN Study)
BMC Musculoskelet Disord, 18 (1), 121
DOI 10.1186/s12891-017-1491-7, PubMed 28327114 -
The effectiveness of decompression alone compared with additional fusion for lumbar spinal stenosis with degenerative spondylolisthesis: a pragmatic comparative non-inferiority observational study from the Norwegian Registry for Spine Surgery
Eur Spine J, 26 (2), 404-413
DOI 10.1007/s00586-016-4683-1, PubMed 27421276 -
Does surgical technique influence clinical outcome after lumbar spinal stenosis decompression? A comparative effectiveness study from the Norwegian Registry for Spine Surgery
Eur Spine J, 26 (2), 420-427
DOI 10.1007/s00586-016-4643-9, PubMed 27262561 -
No differences between physiotherapy and decompression surgery for patients considered surgical candidates for lumbar spinal stenosis [commentary]
J Physiother, 62 (1), 49
DOI 10.1016/j.jphys.2015.09.005, PubMed 26701160 -
Cost-effectiveness of total disc replacement versus multidisciplinary rehabilitation in patients with chronic low back pain: a Norwegian multicenter RCT
Spine (Phila Pa 1976), 39 (1), 23-32
DOI 10.1097/BRS.0000000000000065, PubMed 24150435 -
Do more MRI findings imply worse disability or more intense low back pain? A cross-sectional study of candidates for lumbar disc prosthesis
Skeletal Radiol, 42 (11), 1593-602
DOI 10.1007/s00256-013-1700-x, PubMed 23982421 -
Comparison of the SF6D, the EQ5D, and the oswestry disability index in patients with chronic low back pain and degenerative disc disease
BMC Musculoskelet Disord, 14, 148
DOI 10.1186/1471-2474-14-148, PubMed 23622053 -
Segmental mobility, disc height and patient-reported outcomes after surgery for degenerative disc disease: a prospective randomised trial comparing disc replacement and multidisciplinary rehabilitation
Bone Joint J, 95-B (1), 81-9
DOI 10.1302/0301-620X.95B1.29829, PubMed 23307678 -
Prognostic factors of prolonged disability in patients with chronic low back pain and lumbar degeneration in primary care: a cohort study
Spine (Phila Pa 1976), 38 (1), 65-74
DOI 10.1097/BRS.0b013e318263bb7b, PubMed 22718223 -
Adjacent level degeneration and facet arthropathy after disc prosthesis surgery or rehabilitation in patients with chronic low back pain and degenerative disc: second report of a randomized study
Spine (Phila Pa 1976), 37 (25), 2063-73
DOI 10.1097/BRS.0b013e318263cc46, PubMed 22706091 -
Reliability of change in lumbar MRI findings over time in patients with and without disc prosthesis--comparing two different image evaluation methods
Skeletal Radiol, 41 (12), 1547-57
DOI 10.1007/s00256-012-1394-5, PubMed 22430564 -
Predictors of outcome after surgery with disc prosthesis and rehabilitation in patients with chronic low back pain and degenerative disc: 2-year follow-up
Eur Spine J, 21 (4), 681-90
DOI 10.1007/s00586-011-2145-3, PubMed 22246644 -
Reliability of MRI findings in candidates for lumbar disc prosthesis
Neuroradiology, 54 (7), 699-707
DOI 10.1007/s00234-011-0963-y, PubMed 21947249 -
Surgery with disc prosthesis versus rehabilitation in patients with low back pain and degenerative disc: two year follow-up of randomised study
BMJ, 342, d2786
DOI 10.1136/bmj.d2786, PubMed 21596740 -
Effect of glucosamine on pain-related disability in patients with chronic low back pain and degenerative lumbar osteoarthritis: a randomized controlled trial
JAMA, 304 (1), 45-52
DOI 10.1001/jama.2010.893, PubMed 20606148 -
[Habitual luxation of the patella operated on by the Krogius method]
Tidsskr Nor Laegeforen, 82, 687-9
PubMed 13906317 -
[Femoral shortening osteotomy for chronic hip dislocation in patients with cerebral palsy]
Tidsskr Nor Laegeforen, 118 (18), 2773-6
PubMed 9748806 -
Fractures in children with myelomeningocele
Arch Orthop Trauma Surg (1978), 98 (1), 25-8
DOI 10.1007/BF00389706, PubMed 7235874 -
Volkmann's ischaemic contracture of the forearm
Injury, 12 (2), 148-50
DOI 10.1016/0020-1383(80)90140-0, PubMed 7203636 -
Femur lengthening using the Wagner technique
Acta Orthop Scand, 54 (2), 263-6
DOI 10.3109/17453678308996567, PubMed 6846004 -
Arthroplasty of the metacarpophalangeal joints in rheumatoid arthritis with transposition of the interosseus muscles
Scand J Plast Reconstr Surg, 2 (2), 139-43
DOI 10.3109/02844316809010496, PubMed 5733936 -
[Wrist operations in rheumatoid polyarthritis]
Nord Med, 85 (12), 385
PubMed 5574975 -
[Surgical treatment of periarticular diseases]
Tidsskr Nor Laegeforen, 93 (32), 2360-4
PubMed 4771923 -
[Replantation of the forearm]
Tidsskr Nor Laegeforen, 105 (11), 731-4
PubMed 4012678 -
Orofaciodigital syndrome type I in a girl with unilateral tibial pseudarthrosis
J Med Genet, 29 (11), 827-30
DOI 10.1136/jmg.29.11.827, PubMed 1453437 -
Transfer of Fresh versus Frozen Embryos in Ovulatory Women (vol 378, pg 126, 2018)
N. Engl. J. Med., 385 (19), 1824
DOI 10.1056/NEJMx190017