The effect of the number of episodes
| Depressive disorder | Bipolar disorder | |||
|---|---|---|---|---|
| No. | Hazard ratio (95% CI) | No. | Hazard ratio (95% CI) | |
| *Hazard ratio: the rate of a diagnosis of dementia for patients with a given number of prior episodes compared with the rate for patients with one prior episode. | ||||
| †The effect of the type of disorder for patients with one episode. | ||||
| All hazard ratios are adjusted for the effects of sex, age, and calendar time. | ||||
| 1 episode* | 15 085 | 1 (reference) | 2 187 | 1 (reference) |
| 2 episodes | 1 324 | 1.00 (0.25 to 4.06) | 366 | 0.34 (0.05 to 2.56) |
| 3 episodes | 735 | 2.89 (0.64 to 13.02) | 323 | 0.80 (0.15 to 4.43) |
| 4 episodes | 459 | 2.70 (0.58 to 12.58) | 243 | 2.05 (0.39 to 10.68) |
| ⩾5 episodes | 983 | 6.16 (1.39 to 27.22) | 1 083 | 3.19 (0.69 to 14.75) |
| Type of disorder† | 1 (reference) | 1.46 (1.01 to 2.13) | ||