This study measured social functioning, treatment satisfaction and hospital utilization of 88 patients with chronic psychoses before and after a 1-year community mobile team programme, following most of the principles of assertive community treatment. The intervention had a positive impact in all measures. A clinically significant improvement of social functioning, as measured by Birchwood's Social Functioning Scale, was noted in 56% of patients, and 81% of subjects showed a clinically significant increase in satisfaction level. Time hospitalized decreased fourfold and number of admissions decreased twofold. To be certain that the changes found were due to the intervention and not other factors, further prospective studies of mobile community teams versus traditional care are indicated.