Table 2

 Subgroup analysis of patient assessment of spine pain (100 mm VAS) based on the presence of peripheral arthritis or a history of peripheral arthritis

Peripheral arthritis subgroupTime weighted average change from baseline—weeks 0–6
PlaceboActive treatmentDifference in LS Mean (SE)
NoLS Mean (SE)NoLS Mean (SE)
Treatment by peripheral arthritis subgroup interaction test, p =  0.016.
Current arthritis14−15.3 (6.0)44−29.6 (3.4)−14.3 (6.9)
History of arthritis23−18.8 (4.6)73−37.4 (2.6)−18.6 (5.3)
None56−10.0 (3.0)175−42.5 (1.7)−32.5 (3.4)