Aim: The paper reports symptom improvement during intensive psychotherapy in a day hospital at the Wojewodzki Osrodek Leczenia Nerwic. Material: 3509 symptom checklists KO 0, filled-in by 319 patients treated in day hospital in 1990-1998. The group consisted of 235 females and 84 males, with diagnoses of somatization disorder, generalised anxiety disorder, dissociative motor and sensory disorders and with comorbid diagnoses. Method: Symptom checklists KO 0, filled out weekly by patients were examined. For 10 selected symptoms, differential treatment-induced improvement rates were searched for. Results: Particular symptoms disappeared with different velocity during intensive psychotherapy. In subgroups of patients with different psychotherapy outcomes, during subsequent 9 weeks of treatment, different rates of selected 10 neurotic disorders' symptoms improvement were found. Conclusion: During psychotherapy processes with beneficial final results, a higher improvement speed for selected symptoms was observed. However, significant differences in particular symptom improvement rates make treatment monitoring more complicated.