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Table 2 Data collection and outcome measures

From: The CASCADE trial: effectiveness of ceramic versus PEEK cages for anterior cervical discectomy with interbody fusion; protocol of a blinded randomized controlled trial

Measure Pre-Op Intra-Op 3 months 6 months 12 months 24 months
Inclusion / exclusion criteria x      
Product use, operative time, blood loss   x     
Neurological examination x   x x x x
Neck Disability Index, Arm Pain VAS, Neck Pain VAS, SF-36, Recovery Likert x   x x x x
Radiographs X-ray x   x x x x
CT scan     x