Table 1.
Sociodemographic Characteristics of the Life Events Sample
| Cases (n = 253) | Controls (n = 301) | ||||
|---|---|---|---|---|---|
| Mean (SD) | Weighted Mean (SD) | T | df | P | |
| Age in years | 29.0 (8.85) | 37.0 (12.20) | −8.44 | 553 | <.001 |
| n (%) | n (w%) | x 2 | df | P | |
| Sex | |||||
| Men | 156 (61.7) | 153 (50.1) | 7.41 | 1 | .011 |
| Women | 97 (38.3) | 148 (49.9) | |||
| Ethnicity | |||||
| White British | 70 (27.7) | 131 (42.6) | 39.15 | 5 | <.001 |
| White Other | 32 (12.7) | 44 (21.8) | |||
| Black African | 65 (25.7) | 50 (13.0) | |||
| Black Caribbean | 45 (17.8) | 44 (11.2) | |||
| Asian (all) | 13 (5.1) | 17 (6.8) | |||
| Other | 28 (11.1) | 15 (4.7) | |||
| Highest level of education (6 missing values) | |||||
| University | 56 (22.5) | 165 (56.7) | 75.81 | 2 | <.001 |
| Further education | 104 (41.8) | 96 (31.1) | |||
| School | 89 (35.7) | 38 (12.3) | |||
| Subject social class (main) | |||||
| Salariat | 28 (11.1) | 150 (53.8) | 150.18 | 5 | <.001 |
| Intermediate | 71 (28.1) | 76 (25.6) | |||
| Working Class | 103 (40.7) | 37 (10.7) | |||
| Student | 20 (7.9) | 32 (7.8) | |||
| Long-term unemployed | 22 (8.7) | 1 (0.2) | |||
| Non-classifiable | 9 (3.6) | 5 (1.9) | |||
| Family history of psychosis (78 missing values) | |||||
| No | 182 (85.9) | 252 (93.6) | 7.85 | 1 | .044 |
| Yes | 30 (14.2) | 12 (6.4) | |||
| Current cannabis use (50 missing values) | |||||
| No | 155 (67.7) | 230 (83.6) | 17.48 | 1 | <.001 |
| Yes | 74 (32.3) | 45 (16.4) | |||
| Diagnosis—cases only (3 missing values) | |||||
| Non-affective psychosis | 190 (76.0) | — | — | — | — |
| Affective psychosis | 60 (24.0) | — |
Note: df, degrees of freedom; SD, standard deviation. w, weighted (for the population proportions of age, gender and ethnicity according to Census values within Lambeth & Southwark).