Influence of three antipsychotics on cognitive function and social functioning in patients with first-episode schizophrenia

Abstract

Objective To compare the influence of risperidone,olanzapine and quetiapine on cognitive function and social functioning in patients with first-episode schizophrenia. Methods Total of 61 patients diag-nosed with first-episode schizophrenia were evaluated on efficacy, social functioning and cognitive function in 6 weeks,and 42 healthy controls were given a same cognitive function assessment. Results Mean doses were 4.2 mg/d, 18.6 mg/d,and 561.3 mg/d for risperidone,olanzapine,and quetiapine respectively. The mean change from baseline to end point in PANSS and PSP total score in three groups were 19.7±20.2,20.2±21.0,15.8±19.4 and 7.8±16.3,8.2±15.2,6.8±14.8 respectively. Significant improvements from baseline to end point were observed on the CGI-S scale in the three treatment groups (P<0.05). All the patients before treatment compare with normal controled group in cognitive function measurement such as WCST,TMT and WMS,were sig-nificant differences (P<0.05). Executive function and memory after treatment had not improved in risperidone and quetiapine group, while three indices of WCST has improved in olanzapine group (P<0.05) ,rate of motion percep-tion,attention and capacity of concept conversion had be improved in all groups (P<0.05). The most frequently adverse events reported in Risperidone group was EPS which were mild in severity,in olanzapine and quetiapine group,the most frequently adverse events were somnolence. Conclusion Risperidone,olanzapine and quetiapine can improve part of cognitive function and social functioning in patients with first-episode schizophrenia, and the effects of them were similar. Key words: First-episode schizophrenia; Cognitive function; Social functioning