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Table 2 Input data from individual randomized trials

From: Individual patient data meta-analysis of trials investigating the effectiveness of intra-articular glucocorticoid injections in patients with knee or hip osteoarthritis: an OA Trial Bank protocol for a systematic review

  Type of data
Baseline  
At least available input data:  
Trial number Created by OA Trial Bank
Patient ID Random number
Date of randomization Date
Age Continuous
Gender Dichotomous (male/female)
Body mass index (or weight and length) Continuous
Type of osteoarthritis Dichotomous (hip/knee)
Type of intervention String variable
Pain severity (VAS, NRS, WOMAC, other) Continuous
Collected for current pilot study:  
Signs of inflammation Depends on measurement method
- physical examination
- imaging (that is, sonography, magnetic resonance imaging)
- additional testing (ESR, CRP, inflammatory markers)
Collected when available:  
Osteoarthritis characteristics: Depends on measurement method
- American College of Rheumatology criteria  
- Severity
- Radiographic information
- Kellgren and Lawrence score
Duration of complaints Continuous or dichotomous
Physical functioning (WOMAC/KOOS/KSS/…) Continuous
Patient global assessment Continuous or dichotomous
Outcome measures at follow-up  
At least available input data:  
Pain severity (VAS, NRS, WOMAC, other) Continuous
Collected when available:  
Physical functioning (WOMAC/KOOS/KSS/…) Continuous
Patient global assessment Continuous or dichotomous
  1. CRP, C-reactive protein; ESR, erythrocyte sedimentation rate; KOOS, Knee injury and Osteoarthritis Outcome Score ; KSS, Knee Society Score ; NRS, Numerical Rating Scale ;VAS, Visual Analogue Scale ; WOMAC, Western Ontario and McMaster Universities Osteoarthritis Index.