Table 3.
Comparison of pre- and post-intervention air changes per hour (ACH) in each intervention and control ward space.
| Location | Intervention type | Intervention | PreACH IQR | PostACH IQR | Δ ACH |
|---|---|---|---|---|---|
| Hosp 1 ER | Direct | Louvered doors/windows | (.65–1.49) | (1.72–4.45) | 2.03 |
| Hosp 2 Peds | Direct | Whirlybird | (7.9–12.43) | (9.23–16.64) | 3.6 |
| Hosp 2 ER 2 | Direct | Whirlybird | (3.63–4.96) | (3.49–5.53) | .45 |
| Hosp 2 NICU | Indirect | Whirlybird-adjacent | (3.65–6.74) | (5.45–8.68) | 1.69 |
| Hosp 2 ER | Indirect | Whirlybird-adjacent | (18.4–27.6) | (17.56–25.28) | −2.0 |
| Hosp 1 NICU | Screen | Screen | (1.12–4.32) | (.98–1.75) | −1.35 |
| Hosp 1 Peds | Screen | Screen | (1.34–3.41) | (2.1–3.51) | .49 |
| Hosp 1 ICU | Screen | Screen | (.75–1.65) | (.97–2.48) | .33 |
| Hosp 1 OB | Control | Control | (1.06–1.84) | (1.15–2.01) | .18 |
| Hosp 1 Gyn | Control | Control | (2.69–4.8) | (2.19–3.86) | .63 |