Table 4.
Outcomes of Study Interventions
| Loose Alarm Strategy | Tight Alarm Strategy | P | |
|---|---|---|---|
| Number of subjects | 21 | 21 | – |
| SpO2 Alarms (#/hour) | 1.6 (0.8–2.6) | 5.2 (3.0–6.6) | < 0.001 |
| SpO2/all Alarms (%) | 47 (30–75) | 75 (64–91) | < 0.001 |
| Audible alarm (% time) | 6.9 (2.9–14.3) | 11.7 (10.5–16.4) | 0.034 |
| Hypoxemia [SpO2 < 80%] | |||
| Total (% time) | 0.2 (0.1–0.4) | 0.3 (0.1–0.8) | ns |
| Episodes> 1 min (#/24-h) | 1.2 (0–2.2) | 1.1 (0.3–2.2) | ns |
| Episodes> 3 min (#/24-h) | 0 (0–0.4) | 0 (0–0.5) | ns |
| Hyperoxemia [SpO2 > 98%] | |||
| Total (% time) | 0.2 (0–0.2) | 0.2 (0.1–0.5) | ns |
| Episodes > 1 min (#/24-h) | 0.7 (0–1.7) | 0.5 (0–1.7) | ns |
| Episodes > 3 min (#/24-h) | 0 (0–0) | 0 (0–0) | ns |
SpO2 > 98% excludes time when FiO2 = 0.21. Median (25th–75th percentile). P for paired comparison with Wilcoxon signed-rank test