Comparison of trait-dependent variables between cases with and without psychoses
| Patients with psychosis (n=89) | Patients without psychosis (n=1978) | Statistics | P value | |
| Sex (men/women) | 39/50 | 988/990 | χ2=1.28* | 0.258 |
| Age of onset of epilepsy | 15.5 (SD 11.8) | 19.0 (14.6) | F=4.96† | 0.026 |
| Epilepsy subtypes (T/F/P/O/MU) | 45/27/3/4/10 | 1064/605/59/94/150 | χ2=1.41* | 0.842 |
| Presumed cause (Y/N) (I/N/B/A/C/T/O/U) | 36/53 11/1/9/7/4/3/1/53 | 586/1392 122/89/162/99/78/31/5/1392 | χ2=4.73* χ2=14.4* | 0.029 0.044 |
| Febrile convulsion (Y/N) | 15/74 | 298/1680 | χ2=0.21* | 0.645 |
| Lateralisation of EEG abnormalities (L/R/B/N) | 32/38/15/4 | 774/782/301/121 | χ2=0.96* | 0.812 |
| MTS on MRI (Y/N) (L/R/B/N) | 15/74 6/9/0/74 | 233/1745 111/77/45/1693 | χ2=2.08* χ2=10.4* | 0.150 0.016 |
| Intellectual functioning (N/B/M) | 30/36/23 | 1163/426/389 | z=−4.09‡ | 0.000 |
| Family history of epilepsy (Y/N) | 1/88 | 99/1879 | χ2=2.79* | 0.095 |
| Family history of psychosis (Y/N) | 8/81 | 33/1945 | χ2=23.5 | 0.000 |
Presumed cause: infection (I), neurotrauma (N), birth complication (B), anomaly and migration disorders (A), cerebrovascular (C), tumour (T), others (O), unknown (U); intellectual functioning: normal (N), borderline (B); mildly mentally retarded (M).
Bold type indicates significant P values and statistics (P<0.05).
*Contingency table analysis.
†Analysis of variance.
‡Mann-Whitney test.
EEG, electroencephalography; MTS, mesial temporal sclerosis; N, no; Y, yes.