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Table 1 Sociodemographic characteristics of the first psychotic episode patient sample and healthy controls

From: Plasma brain-derived neurotrophic factor levels, learning capacity and cognition in patients with first episode psychosis

  Patients (n = 45) Controls (n = 45) χ 2 Pvalue
Age, median (SD) 24.3 (8.5) 24.0 (8.8) −0.146 0.884
Marital status, n (%)     
Single 41 (91.1) 39 (86.7) 6.621 0.036
Married 1 (2.2) 6 (13.3)   
Divorced 3 (6.7) 0 (0)   
Years of education, n (%)     
Primary 5 (11.1) 4 (8.9) 3.401 0.334
Obligatory 18 (40) 11 (24.4)   
Secondary 16 (35.6) 24 (53.3)   
University 6 (13.3) 6 (13.3)   
Employment, n (%)     
Student 14 (31.1) 27 (60) 13.425 0.004
Unemployed 14 (31.1) 5 (11.1)   
Working 12 (26.7) 0 (0)   
Sick leave 5 (11.1) 13 (28.9)   
Diagnosis, n (%)     
Schizophrenia 25 (55.6)    
Affective disorder 12 (26.7)    
Non specific psychosis 8 (17.8)    
Drug use, n (%) yes     
Tobacco 29 (64.4) 8 (17.8) 20.240 <0.001
Alcohol 30 (66.7) 16 (35.6) 8.715 0.003
Cannabis 22 (48.9) 3 (6.7) 19.994 <0.001
Other drugs 13 (28.9) 0 (0) 15.195 <0.001
  1. Education: Primary (3–6 years), Obligatory (6–16 years), Secondary (16–18 years), University (18–23 years).
  2. SD Standard deviation.