Table 2 Reported use of fire safety interventions and fire history at baseline visit in study households, by alarm type

Characteristic	Ionization (n = 366) (%)	Photoelectric (n = 384) (%)
Safety practice
No. of smoke alarms present*
0	9.3	9.9
1	40.2	35.9
2	29.2	33.6
⩾3	21.3	20.6
Smoke alarm tested within past†
0–6 months	77.0	73.9
6–12 months	14.2	14.4
>12 months	5.7	6.4
Never	3.2	5.2
⩾1 carbon monoxide alarm	20.3	21.0
Carbon monoxide alarm tested within past†
0–6 months	48.5	50.7
6–12 months	27.3	14.5
>12 months	6.1	10.1
Never	18.2	24.6
⩾1 fire ladder‡	7.8	5.8
⩾1 fire extinguisher	67.5	67.4
Extinguisher pressure check within past 9 months§	31.1	32.4
Designated meeting location¶	31.7	34.6
Know water temperature	47.0	44.0
Water temperature <120° F**	64.9	66.7
Fire history
Prior fire	11.0	10.5
Fire-related injuries††	5.9	8.8
Prior fire
Never	89.0	89.5
Fire without injuries	9.0	8.4
Fire with injuries	0.6	0.8
Fire with unknown injuries	1.4	1.4

*Not including study alarm.
†Restricted to households self-reporting at least one such alarm.
‡Restricted to houses of more than one floor.
§Restricted to households self-reporting at least one fire extinguisher.
¶Restricted to households with more than one resident at some point during the 9 months prior to interview.
**Restricted to respondents who knew water temperature.
††Restricted to households self-reporting prior fire.