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Table 3 In- and exclusion criteria for the randomization procedure of the delphi trial.

From: Rationale and design of The Delphi Trial – I(RCT)2: international randomized clinical trial of rheumatoid craniocervical treatment, an intervention-prognostic trial comparing 'early' surgery with conservative treatment [ISRCTN65076841]

Inclusion Criteria Exclusion Criteria
• Rheumatoid Arthritis patients • Ranawat IIIA and IIIB: neurological impairment
• Age 18–70 • Severe comorbidity
• Ranawat I and II: no neurological impairment • Previous cervical surgery
• C1–C2 subluxation: • C1–C2 subluxation: AADI smaller or larger than the randomization range
   AADI: 5–8 mm  
   AADI: 5–12 mm  
   AADI: 8–12 mm  
• C1–C2 subluxation reducible or irreducible • MRI incompatibility
• Informed consent