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. 2001 Apr 23;2001(2):CD002246. doi: 10.1002/14651858.CD002246

Watson 2005.

Methods Randomised controlled trial. 
 Allocation by independent researcher using computer generated random numbers, in blocks of 8. 
 Blinded outcomes assessment.
Participants 3428 families with children aged <5 years, recruited from caseloads of 62 health visitors.
Interventions I: Structured, individualized 20‐minute safety consultation; free or discounted alarms; alarm installation for low income families. 
 C: Usual care.
Outcomes Medical record review; postal questionnaire to 1000 subjects per group at 12 & 24 months: 
 1) Medically attended injuries. 
 2) Injury hospitalization. 
 3) Final functioning alarms.
Notes No loss to follow‐up for injury outcomes. Response rates at 12 months: I=78%; C=76%. 
 Response rates at 24 months: I=82%; C=76%. 
 Fire‐related injury rates not reported.
Risk of bias
Bias Authors' judgement Support for judgement
Allocation concealment? Low risk A ‐ Adequate