Spine
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Randomized Controlled Trial Clinical Trial
A prospective randomized multicenter clinical evaluation of an anterior cervical fusion cage.
A prospective, concurrently controlled, randomized, multicenter trial of an anterior Bagby and Kuslich cervical fusion cage (BAK/C; Sulzer Spine-Tech, Minneapolis, MN) for treatment of degenerative disc disease of the cervical spine. ⋯ These results demonstrate that outcomes after a cervical fusion procedure with a threaded cage are the same as those of a conventional uninstrumented bone-only anterior discectomy and fusion with a low risk of complications and rare need for autogenous bone graft harvest.
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Randomized Controlled Trial Multicenter Study Comparative Study Clinical Trial
Functional restoration versus outpatient physical training in chronic low back pain: a randomized comparative study.
A randomized parallel-group comparative trial with a 1-year follow-up period was performed. ⋯ It may be that lower economic benefits during sick leave in the United States lead to favorable results from functional restoration programs, whereas greater benefits in Canada, Finland, and Denmark result in different conclusions. Finally, it may be that the difference in results across studies points simply to whether the studies were randomized.