Smoke Alarm and Battery Function 42 Months After Installation: A Randomized Trial

Details

• Personal Author:
  Hamann C ; Jones MP ; Peek-Asa, Corinne ; Yang J ; Young T ; Zwerling C
• Description:
  Background: This randomized trial presents findings from the longest follow-up study of smoke alarm and battery function to date. Purpose: The purpose of this study is to examine differences in long-term function of smoke alarm and battery combinations. Methods: A total of 691 households in an ongoing cohort study were randomly allocated into smoke alarm groups of ionizing and photoelectric and battery groups of zinc and lithium. Smoke alarm function was measured in 633 (91.6%) households from January 2007 through February 2008, 42 months following original smoke alarm/battery installation. Data analyses were conducted in 2009. Results: After 3.5 years, 81.9% of the 1898 smoke alarms were functional. Ionizing alarms with zinc batteries were the least likely to function (72.7%). In comparison, photoelectric alarms with lithium batteries were 2.9 times (95% CI=1.8, 4.5) more likely to function; ionizing alarms with lithium batteries were 2.0 times (95%CI=1.3, 3.1) more likely to function;and photoelectric alarms with zinc batteries were 1.7 times (95% CI=.1, 2.5) more likely to function. Functionality was strongly tied to number of reports of nuisance alarms, which was higher for ionizing than photoelectric alarms. Conclusions: Photoelectric smoke alarms and lithium batteries are the most likely to function long after smoke alarm installation, and may be worthwhile investments despite their increased cost. [Description provided by NIOSH]
• Subjects:
  Cohort Studies Emergencies Occupational Health Safety
• Keywords:
  Batteries Cohort Studies Costs Emergency Equipment Equipment Operation Equipment Reliability Equipment Testing Ionization Lithium Performance Tests Photoelectric Cells Smoke Detectors Warning Devices Zinc

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• ISSN:
  0749-3797
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Iowa ; OSHA Region 7
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  368-371
• Volume:
  39
• Issue:
  4
• NIOSHTIC Number:
  nn:20062435
• Citation:
  Am J Prev Med 2010 Oct; 39(4):368-371
• Contact Point Address:
  Corinne Peek-Asa, PhD, Occupational and Environmental Health, University of Iowa, 100 Oakdale Campus, 114 IREH, Iowa City, IA 52241
• Email:
  corinne-peek-asa@uiowa.edu
• CAS Registry Number:
  Lithium (CAS RN 7439-93-2) ; Zinc (CAS RN 7440-66-6)
• Federal Fiscal Year:
  2011
• Performing Organization:
  University of Iowa
• Peer Reviewed:
  True
• Start Date:
  20050701
• Source Full Name:
  American Journal of Preventive Medicine
• End Date:
  20290630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:ca753ff98169bc0a961622ada830d5a3c04a60f06eab6541d084d5f6a275015ed9d432a1b42744eab22ce0ee1fb5bc5a2b672173ba6831c4928e71411735c645
• Download URL:
  https://stacks.cdc.gov/view/cdc/225685/cdc_225685_DS1.pdf
• File Type:
  [PDF - 68.14 KB ]