Incidence of screening and average screening frequency over the first 3 years of cohort entry and over all available follow-up (2003–2015) for the overall cohort and by exposure status
| Group; analytical period | No. of screens | Person-years | Incidence per 3 person-years (95% CI) | Average years per screen |
|---|---|---|---|---|
| Overall | ||||
| 3 yr | 719 240 | 6 071 289 | 0.355 (0.355–0.356) | 8.45 |
| All follow-up | 958 249 | 4 615 795 | 0.623 (0.622–0.624) | 4.82 |
| Schizophrenia/bipolar disorder | ||||
| 3 yr | 60 436 | 661 669 | 0.274 (0.272–0.276) | 10.95 |
| All follow-up | 84 288 | 519 348 | 0.487 (0.483–0.490) | 6.16 |
| No schizophrenia/bipolar disorder | ||||
| 3 yr | 658 804 | 5 409 619 | 0.365 (0.364–0.366) | 8.22 |
| All follow-up | 874 021 | 4 096 447 | 0.640 (0.639–0.641) | 4.69 |
Note: CI = confidence interval.