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Table 2 Quality assessment of cohort studies according to the Newcastle Ottawa Scale (NOS)

From: Comparison of outcomes after anterior cervical discectomy and fusion with and without a cervical collar: a systematic review and meta-analysis

Author

Selection

Comparability

Exposur

Total score

Scerrati.et al

3

2

3

8

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Journal of Orthopaedic Surgery and Research

ISSN: 1749-799X