Table 3.

Log-intensity ratio and intensity ratio estimates for activity at the individual joint level, together with associated 95% confidence intervals (in parentheses)

Effect on transition to damage	Estimate	Intensity ratio
No previous damage in either joint
Tenderness in the transitive joint	1.01 (0.72, 1.31)	2.76 (2.06, 3.70)
Effusion in the transitive joint	1.50 (1.22, 1.77)	4.47 (3.38, 5.90)
Activity in the opposite joint	0.17 (−0.10, 0.44)	1.18 (0.90, 1.55)
Transitive joint active in the past	0.76 (0.52, 1.00)	2.14 (1.68, 2.71)
Opposite joint active in the past	0.10 (−0.15, 0.35)	1.10 (0.86, 1.41)
Opposite joint damaged
Tenderness in the transitive joint	0.81 (0.41, 1.20)	2.24 (1.51, 3.32)
Effusion in the transitive joint	0.78 (0.34, 1.23)	2.19 (1.40, 3.41)
Transitive joint active in the past	0.31 (0.01, 0.62)	1.37 (1.00, 1.86)