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Table 2 Awakening and Escaping by Type of Alarm, Age Group, and Sex

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

  Number of Participants Number Awakened Time-to-Awaken (seconds) Number Escaped Time-to-Escape (seconds)
Type of Alarm, Age Group, Sex n n (%) Median (IQR) n (%) Median (IQR)
Female Voice
 Age (years)
  20–29 69 69 (100.0) 1.0 (1.0 to 1.0) 69 (100.0) 9.0 (7.0 to 12.0)
  30–39 53 53 (100.0) 1.0 (1.0 to 2.0) 53 (100.0) 9.0 (7.0 to 11.0)
  40–49 28 28 (100.0) 1.0 (1.0 to 2.0) 28 (100.0) 9.0 (7.0 to 11.5)
 Sex
  Male 49 49 (100.0) 1.0 (1.0 to 2.0) 49 (100.0) 9.0 (7.0 to 12.0)
  Female 101 101 (100.0) 1.0 (1.0 to 1.0) 101 (100.0) 9.0 (7.0 to 12.0)
Subtotal 150 150 (100.0) 1.0 (1.0 to 2.0) 150 (100.0) 9.0 (7.0 to 12.0)
Male Voice
 Age (years)
  20–29 69 69 (100.0) 1.0 (1.0 to 1.0) 69 (100.0) 9.0 (8.0 to 13.0)
  30–39 53 53 (100.0) 1.0 (1.0 to 2.0) 53 (100.0) 9.0 (8.0 to 10.0)
  40–49 28 28 (100.0) 1.0 (1.0 to 1.5) 28 (100.0) 9.0 (7.0 to 12.0)
 Sex
  Male 49 49 (100.0) 1.0 (1.0 to 2.0) 49 (100.0) 8.0 (7.0 to 11.0)
  Female 101 101 (100.0) 1.0 (1.0 to 1.0) 101 (100.0) 9.0 (8.0 to 12.0)
Subtotal 150 150 (100.0) 1.0 (1.0 to 2.0) 150 (100.0) 9.0 (7.0 to 12.0)
Low-Frequency Tone
 Age (years)
  20–29 69 69 (100.0) 1.0 (1.0 to 1.0) 69 (100.0) 9.0 (7.0 to 14.0)
  30–39 53 53 (100.0) 1.0 (1.0 to 1.0) 53 (100.0) 11.0 (8.0 to 13.0)
  40–49 28 28 (100.0) 1.0 (1.0 to 1.0) 28 (100.0) 10.0 (7.0 to 11.5)
 Sex
  Male 49 49 (100.0) 1.0 (1.0 to 2.0) 49 (100.0) 9.0 (7.0 to 13.0)
  Female 101 101 (100.0) 1.0 (1.0 to 1.0) 101 (100.0) 10.0 (8.0 to 13.0)
Subtotal 150 150 (100.0) 1.0 (1.0 to 1.0) 150 (100.0) 10.0 (7.0 to 13.0)
High-Frequency Tone
 Age (years)
  20–29 69 69 (100.0) 2.0 (1.0 to 2.0) 69 (100.0) 12.0 (10.0 to 17.0)
  30–39 53 53 (100.0) 2.0 (1.0 to 2.0) 53 (100.0) 12.0 (9.0 to 14.0)
  40–49 28 27 (96.4) 1.0 (1.0 to 2.0) 27 (96.4) 11.0 (8.0 to 14.0)
 Sex
  Male 49 48 (98.0) 2.0 (1.0 to 2.0) 48 (98.0) 13.0 (9.0 to 16.0)
  Female 101 101 (100.0) 2.0 (1.0 to 2.0) 101 (100.0) 12.0 (10.0 to 14.0)
Subtotal 150 149 (99.3) 2.0 (1.0 to 2.0) 149 (99.3) 12.0 (9.0 to 16.0)
Total 600 599 (99.8) 1.0 (1.0 to 2.0) 599 (99.8) 10.0 (8.0 to 13.0)
  1. IQR Interquartile range
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