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Table 3 Comparisons of Time-to-Awaken and Time-to-Escape Between Types of Alarms

From: Optimizing smoke alarm signals: Testing the effectiveness of children’s smoke alarms for sleeping adults

  Time to Awaken Time to Escape
Alarm Signal Comparison Wilcoxon’s P-Value HR (95% CI)* Wilcoxon’s P-Value HR (95% CI)*
Overall
 Equality of Alarm Signals < 0.001   < 0.001  
Pairwise Comparison
 ‘Female voice’ vs ‘High-frequency tone’ <.001 1.40 (1.11–1.77) <.001 1.83 (1.45–2.31)
 ‘Male voice’ vs ‘High-frequency tone’ <.001 1.33 (1.06–1.68) <.001 1.71 (1.36–2.15)
 ‘Low frequency tone’ vs ‘High-frequency tone’ <.001 1.50 (1.19–1.89) <.001 1.42 (1.13–1.78)
 ‘Female voice’ vs ‘Male voice’ 0.346 1.05 (0.84–1.32) 0.7946 1.07 (0.85–1.35)
 ‘Female voice’ vs ‘Low frequency tone’ 0.340 0.93 (0.74–1.17) 0.0272 1.30 (1.03–1.63)
 ‘Male voice’ vs ‘Low frequency tone’ 0.058 0.89 (0.71–1.11) 0.052 1.21 (0.96–1.52)
  1. HR Hazard ratio
  2. CI Confidence interval
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