Table 4. Cost Savings.
| Variable | No intervention (start of postintervention period) | Full intervention (end of postintervention period) | Difference |
|---|---|---|---|
| ITS falls per 1000 patient-days | |||
| Rate | 2.3 (2.1 to 2.4) | 1.9 (1.6 to 2.1) | 0.4 (0.2 to 0.6) |
| No injury rate | 1.7 (1.5 to 1.9) | 1.4 (1.1 to 1.7) | 0.3 (0.1 to 0.8) |
| With injury rate | 0.6 (0.5 to 0.7) | 0.5 (0.4 to 0.6) | 0.10 (0.05 to 0.14) |
| No. of patients (unique admissions)a | 305 669 | 305 669 | NA |
| No. of patient-daysa | 1 492 832 | 1 492 832 | NA |
| No. patients | |||
| No fallb | 302 265 (302 026 to 302 519) | 302 833 (302 564 to 303 251) | 567 (284 851) |
| Fall, no injuryb | 2503 (2187 to 2865) | 2078 (1659 to 2603) | −425 (−695 to −155) |
| Fall, with injuryb | 900 (806 to 1014) | 758 (646 to 882) | −142 (−215 to −69) |
| Avgerage cost per patient, $ | |||
| No fall | 24 175 (23 872 to 24 478) | 24 175 (23 872 to 24 478) | NA |
| Fall, no injury | 62 521 (54 779 to 70 264) | 62 521 (54 779 to 70 264) | NA |
| Fall, any injury | 64 526 (55 650 to 73 401) | 64 526 (55 650 to 73 401) | NA |
| Total costs, $ (millions) | |||
| For all patients, no fall | 7307.2 (7197.6 to 7394.1) | 7320.9 (7212.2 to 7414.5) | 13.8 (5.9 to 21.6) |
| Fall, no injury | 156.5 (104.8 to 230.1) | 129.9 (79.5 to 209.1) | −26.6 (−45.9 to −7.3) |
| Fall, any injury | 58.1 (39.3 to 85.1) | 48.9 (31.5 to 74.1) | −9.2 (−14.6 to −3.8) |
| Sum of previous 3 entries | 7521.8 (7229.6 to 7777.8) | 7499.8 (7251.8 to 7786.5) | −22.0 (−53.8 to 10.8) |
| Per 1000 patient-days | 5 038 626 (4 842 444 to 5 210 825) | 5 023 864 (4 857 736 to 5 215 950) | −14 762 (−36 097 to 6573) |
Abbreviations: ITS, interrupted time series; NA, not applicable.
a
Number of patients in the postintervention period.
b
Estimated number of patients, model-based estimate based on the ITS.