Table 3.

Percentage reduction in numerical pain rating score from baseline at week 4 and 12

	Percentage of total population	Week 4 % (mean ± SE)	Week 12 % (mean ± SE)
Total population	100	33.7 ± 3.99	30.5 ± 4.84
Subgroups
Worsening of response (group 1)	3.3	−34.7 ± 10.3	−28.0 ± 1.84
No response (group 2)	30.8	0.01 ± 2.12	−5.62 ± 3.7
Maximum response with trend to return to baseline (group 3)	31.9	42.5 ± 5.94	15.6 ± 6.30
Maximum response which is maintained during 12 weeks (group 4)	34.1	61.7 ± 5.24	69.7 ± 5.11

Abbreviation: SE, standard error.