Table 2

Clinical improvement as assessed by ACR criteria

Assessor (time point)
Response
ACZ885
Placebo (n = 15)
P value (10 mg/kg versus placebo)





0.3 mg/kg (n = 6)
1.0 mg/kg (n = 6)
3.0 mg/kg (n = 6)
10 mg/kg (n = 19/20a)



Blinded observer (day 43)
ACR20
1 (17%)
0 (0%)
4 (67%)
6 (32%)
1 (7%)
0.085

ACR50
0 (0%)
0 (0%)
1 (17%)
3 (16%)
0 (0%)
0.162

ACR70
0 (0%)
0 (0%)
0 (0%)
2 (11%)
0 (0%)
0.305
Investigator (any time within 6 weeks of treatment start)
ACR20
3 (50%)
2 (33%)
4 (67%)
10 (50%)
3 (20%)
0.070

ACR50
0 (0%)
0 (0%)
2 (33%)
4 (20%)
0 (0%)
0.093

ACR70
0 (0%)
0 (0%)
0 (0%)
3 (15%)
0 (0%)
0.174

Shown are the number and percentage of patients achieving 20%, 50%, or 70% improvement in terms of American College of Rheumatology (ACR) criteria (ACR20, ACR50 and ACR70, respectively) at day 43 as assessed by a blinded observer and at any time point within 6 weeks of treatment start as assessed by the investigator. aNote that for one patient in the 10 mg/kg treatment group, the ACR criteria assessment by a blinded observer was not conducted at day 43.

Alten et al. Arthritis Research & Therapy 2008 10:R67   doi:10.1186/ar2438