Prevalence of working smoke alarms in local authority inner city housing: randomised controlled trial

摘要: OBJECTIVES: To identify which type of smoke alarm is most likely to remain working in local authority inner city housing, and an tolerated households with smokers. DESIGN: Randomised controlled trial. SETTING: Two housing estates London. PARTICIPANTS: 2145 households. INTERVENTION: Installation one five types (ionisation sensor a zinc battery; ionisation battery pause button; lithium optical or battery). MAIN OUTCOME MEASURE: Percentage homes any percentage the installed for this study was after 15 months. RESULTS: 54.4% (1166/2145) all 45.9% (465/1012) occupied by smokers had alarm. Ionisation sensor, battery, there being smoker household were independently associated whether (adjusted odds ratios 2.24 (95% confidence interval 1.75 2.87), 2.20 (1.77 2.75), 0.62 (0.52 0.74)). The common reasons non-function missing (19%), (17%), disconnected (4%). CONCLUSIONS: Nearly half alarms not when tested months later. Type power source are important determinants