|Outcomes at 24 months||Free alarms||Control||Relative risk (95% CI)|
|†CI defined in glossary; relative risks account for clustering by ward and matching by Jarman score, with adjustment for baseline rates.|
|‡Events per 100 000 person years|
|§Events per 100 000 household years|
|All injuries‡||40.3||32.5||1.3 (0.9 to 1.9)|
|Hospital admissions and deaths‡||9.1||7.2||1.3 (0.7 to 2.3)|
|Preventable injuries‡||29.4||26.3||1.2 (0.8 to 1.8)|
|Preventable hospital admissions and deaths‡||5.6||5.6||1.0 (0.5 to 2.0)|
|Fires attended by fire brigade§||356.3||333.0||1.1 (0.96 to 1.3)|
Providing free smoke alarms did not reduce fire related injuries in a deprived multiethnic urban population
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