Table 1 Basic demographic characteristics of psychosis patients and unaffected controls
Demographic variablePatients (n = 285)
n (%)
Controls (n = 256)
n (%)
χ2d.f.P
Gender2.5710.065
 Male172 (60.4)137 (53.5)
 Female113 (39.6)119 (46.5)
Ethnicity32.605<0.001
 White British72 (25.3)102 (39.9)
 Black Caribbean56 (19.6)39 (15.2)
 Black African65 (22.9)32 (12.5)
 White other30 (10.5)50 (19.5)
 Asian (all)24 (8.4)16 (6.3)
 Other38 (13.3)17 (6.6)
Level of education76.734<0.001
 No qualifications48 (17.6)7 (3.0)
 School leaving qualifications64 (23.5)23 (10.0)
 A-levels/college level qualifications40 (14.7)53 (22.9)
 Vocational qualifications66 (24.3)37 (16.0)
 University or professional qualifications54 (19.9)111 (48.1)
Age in yearst=0.3425360.733
Mean (s.d.)28.9 (9.3)29.2 (9.9)
  • d.f., degrees of freedom; s.d., standard deviation.