Change in percentage of adjusted mean sound level measurements below 45, 50 and 55 dB after implementation of immediate direct audit and visual feedback
| NICU area | ||||
|---|---|---|---|---|
| Blue pod | Yellow pod | Green pod | Desk | |
| 45 dB | ||||
| Pre: adjusted mean % at or below | 0.9 | 0.3 | 4.8 | 1.8 |
| Post: adjusted mean % at or below | 3.3 | 0.8 | 5.8 | 1.9 |
| Adjusted differences in mean % (post-pre) | 2.4 | 0.5 | 1.0 | 0.1 |
| p Value | <0.001 | 0.47 | 0.8 | 0.99 |
| 50 dB | ||||
| Pre: adjusted mean % at or below | 24.0 | 24.4 | 38.9 | 24.7 |
| Post: adjusted mean % at or below | 33.9 | 33.3 | 46.2 | 26.7 |
| Adjusted differences in mean % (post-pre) | 9.9 | 8.9 | 7.3 | 2.0 |
| p Value | <0.001 | 0.02 | 0.02 | 0.79 |
| 55 dB | ||||
| Pre: adjusted mean % at or below | 91.8 | 91.5 | 83.6 | 77.9 |
| Post: adjusted mean % at or below | 91.4 | 90.4 | 84.8 | 77.9 |
| Adjusted differences in mean % (post-pre) | −0.3 | −1.0 | 1.2 | −0.03 |
| p Value | 0.98 | 0.92 | 0.91 | 1.0 |
NICU, neonatal intensive care unit.