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Grade I degenerative spondylolisthesis
43%
49/113
Inability to walk at least 100 feet
2%
2/113
Cauda equina syndrome
37%
42/113
Fixed sensory deficit
5%
6/113
Intermittent foot drop
6%
7/113
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Kondrashov and associates noted stable good outcomes at 4 years in 14 of 18 patients treated with X-STOP interspinous process decompression as defined as an improvement over preoperative Oswestry scores of 15 points or more. Similar results were seen after 1 year in a European study by Siddiqui and associates. Exclusion and inclusion criteria for these studies varied somewhat, but cauda equina syndrome was the only exclusion criteria listed in both studies. All of the other choices did not represent exclusion criteria in either study.
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