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  • Surgical stabilization...

Surgical stabilization improves outcomes in patients with odontoid fractures

Written By : Dr. Kamal Kant Kohli Published On 2023-07-05T09:15:59+05:30  |  Updated On 5 July 2023 10:57 AM IST
Surgical stabilization improves outcomes in patients with odontoid fractures
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USA: A recent study has revealed that surgical stabilization of the fracture was associated with less myelopathy and lower rates of fracture nonunion, 30-day mortality, and one-year mortality among patients with odontoid fractures compared with nonoperative approaches to treatment.

The study will publish in the September issue of Neurosurgery, the official publication of the Congress of Neurological Surgeons, published in the Lippincott portfolio by Wolters Kluwer. The article is published as part of Neurosurgery’s High-Impact Manuscript Service (HIMS).

Odontoid fractures-those occurring in the second cervical vertebra-are common in elderly patients after a low-energy fall. However, whether the initial treatment should be surgical or nonoperative still isn't known. Previous studies haven't accounted for differences in injury severity, or the presence or absence of neurologic impairment, which can affect patients’ results.

Michael B. Cloney, MD, MPH, of the Department of Neurological Surgery at Northwestern University in Chicago, and colleagues have published evidence that surgery should be considered as the initial approach for many patients. Compared with nonoperative approaches to treatment, surgical stabilization of the fracture was associated with less myelopathy (mobility impairment due to spinal cord damage), and lower rates of fracture nonunion, 30-day mortality, and one-year mortality.

"Given the increasing incidence of odontoid fractures with the aging population, we believe our findings could assist with neurosurgical decision-making for an increasingly common and complex problem," the researchers say.

Propensity score matching: A way to account for nonrandomized patient groups

Dr. Cloney and his colleagues reviewed initial treatment data on 296 patients cared for at Northwestern Memorial Hospital between January 1, 2010, and December 31, 2020, because of an odontoid fracture. Their average age was 73. During the hospitalization, 22% had surgery and 78% had nonoperative treatment (5% were immobilized in a halo-vest and 73% received a cervical collar).

Since the patients weren’t randomized to these treatments, the research team used a type of analysis called propensity score adjustment. They calculated “propensity scores” for each individual—the probability that the patient would have been assigned to receive one of the two treatment approaches based on certain characteristics.

For example, to study the effect of surgery on mortality rates, patients were matched on age, sex, Injury Severity Score, Nurick score (a measure of myelopathy), their number of chronic diseases and chronic conditions such as smoking, and whether they had to be admitted to the intensive care unit.

Surgical stabilization leads to better results

Follow up with patients lasted an average of 45 weeks. On the propensity score–matched analyses, the group that underwent surgery showed significantly better outcomes than the nonoperative group:

Lower rate of fracture nonunion—39.7% vs. 57.3%; treatment effect, 15% less risk of nonunion

Lower 30-day mortality rate—1.7% vs. 13.8%; treatment effect, 10% less risk of death

Lower one year mortality rate—7.0% vs. 23.7%; treatment effect, 10% less risk of death

Other analyses showed patients in the surgery group were 52% less likely than those in the nonoperative group to have poor Nurick scores at the 26-week postoperative follow-up visit and were 41% less likely to die during the overall follow-up period. Both differences were statistically significant.

"The mortality benefit calculated in the existing literature typically represents an unadjusted mortality rate between two potentially different populations, which leaves it liable to confounding," the authors note. "Our study represents a relatively large institutional series that suggests a benefit from surgical stabilization in this population while controlling for confounding factors more thoroughly than existing literature."

NeurosurgerySurgical stabilizationodontoid fracturemortality ratesstabilizationfracturesodontoid
Source : Neurosurgery
Dr. Kamal Kant Kohli
Dr. Kamal Kant Kohli

Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751

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