Thermostatic mixer valve pre- and post-installation risk
| % Of families with at-risk bath water >46°C (intervention) | % Of families with at-risk bath water >46°C (control) | |
| Baseline | 100% | 100% |
| Follow-up | 19% | 87% |
| Reduction in risk | 81% | 13% |
| % Risk difference between groups | 68% reduction (0.81−0.13) | |