| Cronbach’s alpha | |
|---|---|
| Total sample | 0.87 |
| Gender | |
| Female | 0.87 |
| Male | 0.87 |
| Ethnicity | |
| White | 0.85 |
| Black African or African-Caribbean | 0.91 |
| South Asian or Oriental | 0.79 |
| Other | 0.82 |
| Index of multiple deprivation decile | |
| 1–2 | 0.87 |
| 3–4 | 0.85 |
| 5–6 | 0.85 |
| 7–8 | 0.92 |
| 9–10 | 0.82 |
| SDQ classification | |
| Normal | 0.77 |
| Borderline | 0.86 |
| Abnormal | 0.90 |
| PLE | |
| No | 0.87 |
| Yes | 0.92 |
| Service use in past year | |
| Health service use = yes | 0.89 |
| Health service use = no | 0.82 |
| Educational service use = yes | 0.78 |
| Educational service use = no | 0.87 |
SDQ Strengths and Difficulties Questionnaire, PLE psychotic-like experiences within the last year