TABLE 2.
Hazard ratios (HR) for the risk of bipolar disorder in northern Finland birth cohort 1986 in different groups of cannabis use
| Frequency of cannabis use | Sample size | No cannabis use | Once or more | |||
|---|---|---|---|---|---|---|
| Cases | Cases | HR | 95% CI | |||
| Bipolar disorder | Crude | 6325 | 55 | 11 | 3.46 | 1.81–6.61 |
| Model 1 | 5413 | 49 | 9 | 3.00 | 1.47–6.13 | |
| Model 2 | 5190 | 49 | 9 | 2.34 | 1.11–4.94 | |
| Model 3 | 4992 | 47 | 9 | 1.70 | 0.73–3.98 | |
Model 1: sex, family structure, parental psychiatric disorder; model 2: sex, family structure, parental psychiatric disorder, YSR total; model 3: sex, family structure, parental psychiatric disorder, YSR total, frequent alcohol intoxications past year, daily smoking, other illicit substance use. Statistically significant results in bold type. CI = confidence interval; YSR = Youth Self Report.