Table 1.
Basic Sociodemographic Characteristics by Case-Control Status
| Controls (n = 226) | Cases (n = 278) | t | df | P | |
|---|---|---|---|---|---|
| Age (yr) | |||||
| Mean | 28 | 28 | 26.21 | 45 | .42 |
| SD | 9.80 | 9.04 | |||
| n (%) | n (%) | x² | df | P | |
| Gender | |||||
| Male | 122 (53.98) | 177 (63.67) | 4.84 | 1 | .02 |
| Female | 104 (46.02) | 101 (36.33) | |||
| Ethnicity | |||||
| White British | 85 (37.61) | 72 (25.90) | 23.87 | 5 | <.001 |
| Asian | 13 (5.75) | 23 (8.27) | |||
| Black Caribbean | 34 (15.04) | 39 (14.03) | |||
| Black African | 33 (14.60) | 72 (25.90) | |||
| Others | 30 (13.27) | 54 (19.42) | |||
| Non-British White | 31 (13.72) | 18 (6.47) | |||
| Educationa | |||||
| No qualification | 6 (2.65) | 41 (14.86) | 78.31 | 4 | <.001 |
| GCSE/O levels | 23 (10.18) | 74 (26.81) | |||
| A levels | 51 (22.57) | 37 (13.41) | |||
| Vocational/college | 36 (15.93) | 68 (24.64) | |||
| University/professional | 110 (48.67) | 56 (20.29) | |||
| Place of Birthb | |||||
| UK Born | 143 (64.13) | 145 (54.10) | 5.04 | 1 | .025 |
| Non-UK born | 80 (35.87) | 123 (45.90) | |||
| Family history of psychosisc | |||||
| Any | 15 (7.14) | 45 (20.83) | 16.49 | 1 | <.001 |
| None | 195 (92.86) | 171 (79.17) |
Note: df, degrees of freedom.
aMissing values: 2.
bMissing values: 13.
cMissing values: 78.