Table 2.

Brief pain inventory interference mean scores (with 95 % confidence interval) for each domain over time

	Baseline (95 % CI)	6 weeks (95 % CI)	3 months (95 % CI)
General activity	5.3 (4.9 to 5.8)	4.2 (3.7 to 4.7)	4.3 (3.8 to 4.8)
Mood	5.4 (4.9 to 5.9)	4.5 (4.0 to 5.0)	3.7 (3.2 to 4.2)
Walking ability	4.6 (4.0 to 5.1)	3.4 (2.9 to 3.9)	3.1 (2.6 to 3.6)
Normal work	5.9 (5.5 to 6.4)	4.1 (3.6 to 4.6)	4.2 (3.8 to 4.7)
Relationships	4.1 (3.6 to 4.6)	3.5 (3.0 to 4.0)	3.3 (2.8 to 3.7)
Sleep	5.1 (4.5 to 5.6)	3.8 (3.3 to 4.4)	3.6 (3.1 to 4.1)
Enjoyment of life	5.5 (5.1 to 6.0)	4.2 (3.7 to 4.6)	3.8 (3.4 to 4.3)