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Table 4 Outcomes of Study Interventions

From: Evaluation of two SpO2 alarm strategies during automated FiO2 control in the NICU: a randomized crossover study

  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
  1. SpO2 > 98% excludes time when FiO2 = 0.21. Median (25th–75th percentile). P for paired comparison with Wilcoxon signed-rank test