Foam mattress v foam overlay for preventing pressure ulcers*
| Outcome | Mattress EER | Overlay CER | RRR (95% CI) | ARR |EER - CER| | NNT (CI) |
|---|---|---|---|---|---|
| *Abbreviations defined in glossary; RRR, ARR, NNT, and CI calculated from data in article. | |||||
| Patients with pressure ulcers | 25% | 60% | 58% (10 to 82) | 35% | 3 (2 to 23) |