Impact on Thai psychiatrists of passive dissemination of a clinical practice guideline on prescribing attitudes in treatment-resistant schizophrenia.

This study aimed to determine the impact of a particular clinical practice guideline (CPG) following its passive dissemination on Thai psychiatrists' prescribing attitudes towards treatment-resistant schizophrenia (TRS). Two surveys were conducted before and after the dissemination of the CPG. Ninety-four questionnaires from the first survey and 84 from the second were analysed. Over 70% of the respondents were male. The mean age and duration of practice were 42.3 and 15.3 years, respectively. The respondents' characteristics were not significantly different in sex, age, years of practice, specialty, or clinical setting. In the first survey, the first three favoured interventions for TRS were switching to risperidone alone, switching to another conventional antipsychotic (CA), and adding carbamazepine to the on-going CA. In the second round, the first three interventions were switching to risperidone alone, switching to another CA, and switching to clozapine alone. Although there was a trend in the direction suggested by the CPG, there was no significant difference between the two surveys. The interventions chosen as first, second-, and third-line treatments were also not significantly different. Of 80 respondents who expressed their opinions on the CPG, 55, 15, and 10 stated that they knew, did not know, and were uncertain about the availability of a guideline, respectively. Of 55 respondents who knew about the availability of the guideline, 40 had read it. The mean (SDs) of the guideline acceptance and the impact of the guideline on the practice obtained from those 40 respondents were 70.9 (13.7) and 58.9 (19.6), respectively.