The early diagnostic of schizophrenia and other psychosis is very important for the early therapeutic interventions.

The aim is to describe the connection between the prodromal stage of psychosis and clinical features.

74 patients with late-onset psychosis (mean age 64,33±9, 2 male; age of onset 55,3±11,2): late-onset schizophrenia (LOS) (n=49, mean age 63,0±8,47, age of onset 53,9±9,56), late-onset schizoaffective disorder (LOSaD) (n=17, mean age 62,4±6,5, age of onset 54,6±10,6, 2 male), late onset delusion disorder (LODD) (n=8, mean age 76,6±4,3, age of onset 65,2±17,0). Psychopathological, statistical methods were applied.

Allocated 4 types of prodromal stage – 1st without psychopathological signs (n=24, 33%), 2nd – with affective signs like disturbances of mood, anxiety (n=18, 24%), 3rd – with paranoid signs like acute stress-related paranoid reactions without medication; 4th - with schizoid signs with overvaluated ideas. In the 1st group next syndromes prevailed: with secondary persecutory mood-congruent delusions (n=10, 41,7%); with auditory second-person pseudohallucinations with sistematyzed persecutory delusions (n=9, 37,5%); with only systematized persecutory delusions (n=1, 4,1%); with bizzarre delusions (n=3, 12,5%) and with polymorphic symptoms, include different hallucinations, catatonia disorders and with some oneiroid state signs (n=1, 4,1%). In this group 9 patients were diagnosed with LOS (37,5%); 12 patients with LOSaD (50%) and 3 patients with LODD (12,5%). The 2nd group was presented with auditory second-person pseudohallucinations with sistematyzed persecutory delusions (n=5, 27.7%), with secondary persecutory delusions with delusion mood (n=11, 61%), with systemized persecutory delusional - 5.5% (n=1) and with catatonia (n=1, 5.5%). In this group 12 patients were diagnosed with LOS (66%), 5 patients with LOSaD (28%) and 1 patient with LODD (5.5%). In the 3rd group these syndromes prevailed: with auditory second-person pseudohallucinations with sistematyzed persecutory delusions (n=7, 63%), with secondary persecutory delusions with delusion mood - in 2 cases (18.2%), with bizarre delusions - in 2 cases (18.2%). 12 patients were diagnosed with LOS (n=10.91%) and 1 patient with LODD (1.9%). The 4th group was presented with auditory second-person pseudohallucinations with sistematyzed persecutory delusions (n=5, 23.8%), with secondary persecutory delusions with delusion mood (n=3, 14.3%), with bizarre delusions (n=6, 28.6%), with systemized persecutory delusions (n=1, 4.7%), with catatonia (n=2, 9.5%) and with polymorphic symptoms (n=4, 20%). 18 patients were diagnosed with LOS (85.7%) and 3 patients - with LODD (14.3%).

There are different types of prodromal stage in late-onset psychosis that concluded with clinical features.

None Declared