From: High correlation of VAS pain scores after 2 and 6 weeks of treatment with VAS pain scores at 12 weeks in randomised controlled trials in rheumatoid arthritis and osteoarthritis: meta-analysis and implications
VAS pain
Mean
Median
Minimum
Maximum
CFB at 2 weeks
−21.0
−21.8
−35.5
−0.3
CFB at 6 weeks
−23.5
−24.5
−46.9
−1.0
CFB at 12 weeks
−21.9
−42.9
1.8