Specificity and sensitivity of variables used to estimate incident cases of hospitalized injurious falls, compared with those identified through record linkage
| Case definition | Sensitivity (95% CI) | Specificity (95% CI) | Incidence rate* (95% CI) | Change in incidence† |
|---|---|---|---|---|
| *Incidence rate per 100 000 people aged 50 years and over. | ||||
| †Compared with the incidence obtained based on data record linkage. | ||||
| Exclusion of readmissions within 28 day | 91.6 (91.2 to 92.0) | 55.8 (53.2 to 58.4) | 1097.5 (1082.3 to 1112.8) | ↓5.6% |
| Exclusion of transfers | 93.9 (93.6 to 94.2) | 53.0 (43.9 to 49.2) | 1126.2 (1110.8 to 1141.7) | ↓3.1% |
| Exclusion of both readmissions and transfers | 88.6 (88.2 to 89.1) | 68.3 (65.8 to 70.7) | 1053.6 (1038.7 to 1068.5) | ↓9.4% |
| Inclusion of acute admissions only | 96.4 (96.1 to 96.6) | 12.8 (85.4 to 89.0) | 1185.4 (1169.6 to 1201.2) | ↑2.1% |
| Exclusion of day only admissions | 18.6 (18.1 to 19.1) | 90.9 (89.4 to 92.5) | 219.5 (212.7 to 226.4) | ↓82.2% |
| Internal data linkage | 100% | 100% | 1161.4 (1145.8 to 1177.1) | – |
| All fall related separations | – | – | 1237.5 (1221.3 to 1253.6) | ↑6.6% |