Multivariable analyses of relationship between history of cannabis use at presentation with first episode psychosis and frequency of hospital admissions, likelihood of compulsory hospital admission and mean number of days spent in hospital
| Follow-up period | Number in sample | *Number of admissions to hospital Incidence rate ratio (95% CI), p value | †Compulsory hospital admission OR (95% CI), p value | ‡Number of days spent in hospital β coefficient (95% CI), p value |
|---|---|---|---|---|
| 1 year | 2026 | 1.37 (1.21 to 1.56), p<0.001 | 1.33 (1.06 to 1.67), p=0.02 | 4.1 (−0.6 to 8.7), p=0.09 |
| 2 years | 1738 | 1.40 (1.23 to 1.59), p<0.001 | 1.45 (1.16 to 1.81), p=0.001 | 9.6 (0.7 to 18.5), p=0.03 |
| 3 years | 1461 | 1.48 (1.28 to 1.70), p<0.001 | 1.65 (1.30 to 2.09), p<0.001 | 21.6 (8.5 to 34.8), p=0.001 |
| 4 years | 1185 | 1.51 (1.29 to 1.76), p<0.001 | 1.56 (1.20 to 2.02), p=0.001 | 24.1 (6.1 to 42.0), p=0.009 |
| 5 years | 926 | 1.50 (1.25 to 1.80), p<0.001 | 1.55 (1.16 to 2.08), p=0.003 | 35.1 (12.1 to 58.1), p=0.003 |
Results adjusted for age, gender, ethnicity, marital status and psychotic diagnosis.
*Multivariable negative binomial regression.
†Multivariable logistic regression.
‡Multiple linear regression.