Table 1.
First onset psychosis by diagnosis and time period
| Diagnosis (ICD-10) | TP1 (1978–80)an (%) | TP2 (1992–94)bn (%) | TP3 (1997–99) n (%) | Total n | χ2 test P-valuec |
|---|---|---|---|---|---|
| All psychoses (F10–33) | 97 (100) | 122 (100) | 128 (100) | 347 | – |
| Non-affective psychoses (F20–29) | 70 (72.2) | 80 (65.6) | 78 (60.9) | 228 | 0.21 |
| Of which: | |||||
| Schizophrenia (F20) | 55 (56.7) | 39 (31.2) | 43 (33.6) | 137 | <0.01 |
| Other non-affective psychoses (F21–29) | 15 (15.5) | 41 (33.6) | 35 (27.3) | 91 | 0.01 |
| Substance-induced psychoses (F10–19) | 1 (1.0) | 10 (8.2) | 19 (14.8) | 30 | <0.01d |
| Affective psychoses (F30–33) | 26 (26.8) | 32 (26.2) | 31 (24.2) | 89 | 0.89 |
| Of which | |||||
| Manic psychoses (F30-31) | 9 (9.3) | 15 (12.3) | 14 (10.9) | 38 | 0.77 |
| Depressive psychoses (F32-33) | 17 (17.5) | 17 (13.9) | 17 (13.3) | 51 | 0.64 |
| Denominator (1 year) | 195 616 | 208 069 (100) | 215 479 (100) | 619 164 | – |
| Of which | |||||
| BME populatione | – | 17 175 (8.3) | 25 604 (11.9) | – | <0.01 |
aThe total number of participants reported here is two less than previously reported.9 One participant was excluded because of the narrower age range used in the current study, while one participant was excluded because of a primary ICD-10 diagnosis of personality disorder (F60.1).
bThe total number of participants reported at TP2 was one less than previously reported because of the narrower age range used here.9
cTest for difference over time in proportion of given diagnosis vs all others. χ2 test on 1 df.
dFisher's exact test instead of χ2 due to small numbers in cells.
eUnknown in 1981 because ethnicity was not recorded in 1981 census.