Abstract:
OBJECTIVE:We performed propensity score (PS) models to compare the outcome of patients with myasthenia gravis (MG) submitted to 2 different surgical approaches: extended transsternal (T-3b) or thoracoscopic extended thymectomy (VATET). METHODS:Patients' clinical data were retrieved from the MG database of the C. Besta Neurologic Institute Foundation. In the PS analysis, a matching ratio of 1:1 of the main clinical variables was obtained for the 2 groups of patients and treatment effect was estimated by comparing their outcome. RESULTS:A total of 210 patients met the inclusion criteria, by having a complete set of clinical data, and were included in the PS model; a matched dataset of 122 participants (61 per group) showed an adequate balance of all the covariates. Our analysis demonstrated that 68.9% of patients who had thymectomy by the VATET technique reached the pharmacologic remission/remission status at 2 years from thymectomy compared to 34.4% of those operated on by the T-3b technique (p < 0.001), had a lower INCB-MG score (p < 0.001), and had less muscle fatigability (p = 0.004). Similar results were found considering only nonthymomatous patients with MG. Results were also confirmed by paired statistical tests. CONCLUSIONS:Our PS matching analysis showed that VATET is a reliable and effective surgical approach alternative to T-3b in patients with MG who are candidates for thymectomy. CLASSIFICATION OF EVIDENCE:This study provides Class IV evidence that for patients with MG, VATET is more effective than T-3b thymectomy.
journal_name
Neurologyjournal_title
Neurologyauthors
Brenna G,Antozzi C,Montomoli C,Baggi F,Mantegazza R,INCB-MG Group.doi
10.1212/WNL.0000000000004082subject
Has Abstractpub_date
2017-07-11 00:00:00pages
189-195issue
2eissn
0028-3878issn
1526-632Xpii
WNL.0000000000004082journal_volume
89pub_type
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