Results of probabilistic sensitivity analyses
| Mean | 95% CI | Min | Max | ||
| Incremental SOSA programme cost (£) | 30 | 28 | 32 | 27 | 34 |
| Incremental healthcare cost (£) | −39 | −92 | 10 | −160 | 65 |
| Incremental total cost (£) | −8 | −62 | 40 | −131 | 97 |
| Incremental homes with the three key safety practices | 0.0066 | −0.4233 | 0.4258 | −0.8404 | 0.8974 |
| ICER per additional home with the three key safety practices (£) | 350 | −1621 | 1490 | −719 194 | 2 579 330 |
| Incremental injury avoided | 0.1403 | −0.2673 | 0.5637 | −0.7543 | 1.1110 |
| ICER per injury avoided (£) | −206 | −1161 | 983 | −1 032 089 | 132 462 |
| Incremental QALYs | 0.0034 | −0.0007 | 0.0078 | −0.0057 | 0.0119 |
| ICER per QALY gained (£) | 6600 | −42 876 | 64 771 | −5 458 803 | 16 813 714 |
| Return on investment (£) | 1.28 | −0.33 | 3.08 | −2.08 | 5.48 |
ICER, incremental cost-effectiveness ratio; QALYs, quality-adjusted life-years; SOSA, Stay One Step Ahead.