Incidence of tuberculosis (TB) across biologic risk groups
| Green | Amber | Red | All biologics | |
| Total patients | 6202 (67.0) | 863 (9.32) | 2198 (23.7) | 9263 |
| Person-years observed (years) | 22 558 | 3628 | 8282 | 34 468 |
| Expected active TB cases# | 5.656 | 0.910 | 2.076 | 8.642 |
| Observed active TB cases after biologics started | 11 | 0 | 8 | 19 |
| Excess TB (how many more cases did we see than expected?) | 5.344 | −0.910 | 5.924 | 10.358 |
| Estimated TB incidence cases per 100 000 patient-years | 48.8 (27.0–88.0) | 0.0 | 96.6 (48.3–193.1) | 55.1 (35.2–86.4) |
| Active TB post-drug (%) | 0.177 | 0 | 0.364 | 0.205 |
Data are presented as n (%), n or n (95% CI), unless otherwise stated; data encompass only patients on biologics. #: expected TB cases are calculated assuming a baseline incidence (25.1 cases per 100 000) extrapolated from Public Health England data over the time period studied.