Table 3.
Disease state | Study design | Duration | Dose | N* | Dose response for efficacy outcome |
Yes | |||||
Chronic schizophrenia [16] | Double-blind, randomized | 6 weeks | 5, 10, or 15 mg/d | 198 | Positive linear trend |
Chronic schizophrenia [17] | Double-blind, randomized | 6 weeks | 5, 10, or 15 mg/d | 350 | Positive linear trend |
No | |||||
Chronic schizophrenia or schizoaffective disorder [18] | Double-blind, randomized, | 24 weeks | 10, 15, or 20 mg/d | 202 | No significant trend |
Schizophrenia or schizoaffective disorder [19] | Double-blind, randomized | 8 weeks | 10, 20, or 40 mg/d | 599 | No significant dose response |