Capture–recapture estimates of under-reporting non-fatal occupational injuries by injury severity in Sweden, 2013*
| Overlap | ISA only | AFA only | Total observed † | Total estimated‡ (95% CI) | % under-reported (95% CI) | % captured by ISA | % captured by AFA | |
| Total | 30 872 | 41 049 | 11 406 | 83 327 | 98 493 (98 115 to 98871) | 15.4 (15.1 to 15.7) | 73.0 | 42.9 |
| No healthcare contact§ | 23 206 | 37 618 | 8839 | 69 663 | 83 991 (83 607 to 84376) | 17.1 (16.7 to 17.4) | 72.4 | 38.2 |
| Only outpatient | 6741 | 3226 | 2328 | 12 295 | 13 409 (13 344 to 13475) | 8.3 (7.9 to 8.7) | 74.3 | 67.6 |
| Hospitalised | 925 | 205 | 239 | 1369 | 1422 (1412 to 1432) | 3.7 (3.0 to 4.4) | 79.5 | 81.9 |
*Severity is defined using data from the National Patient Register (NPR), which includes all visits to inpatient or specialised outpatient care (ie, excluding primary care).
†Total observed corresponds to the sum of occupational injuries captured by ISA only, AFA only and the overlap. The final sample for analysis of 83 327 occupational injuries corresponds to 78 743 individuals.
‡Total estimated is the sum of the injuries observed plus those not captured by any of the sources.
§Without any date of admission in the NPR.
AFA, AFA Insurance; ISA, the Information System on occupational injuries.