Table 1.
Characteristics of households on local authority estates in London at baseline. Values are numbers (percentages)
| Characteristic
|
Ionisation sensor
|
Optical sensor
|
||||
|---|---|---|---|---|---|---|
| Zinc battery
|
Lithium battery, pause button (n=267)
|
Lithium battery (n=266)
|
Zinc battery (n=359)
|
|||
| No pause button (n=625)
|
Pause button (n=628)
|
|||||
| Working alarm | 74 (12) | 73 (12) | 31 (12) | 31 (12) | 41 (11) | |
| Open plan kitchen | 148 (24) | 149 (24) | 62 (23) | 60 (23) | 87 (24) | |
| ⩾1 smoker | 295 (47) | 295 (47) | 127 (48) | 125 (47) | 170 (47) | |
| Two adults only | 296 (47) | 299 (47) | 127 (48) | 126 (47) | 170 (47) | |
| Leaseholder | 84 (13) | 83 (13) | 35 (13) | 34 (13) | 48 (13) | |
| Aged ⩾65 years | 162 (26) | 157 (25) | 69 (26) | 72 (27) | 92 (26) | |
| Aged ⩽5 years | 144 (23) | 124 (20) | 63 (24) | 57 (21) | 82 (23) | |
| Ethnic group: | ||||||
| White | 388 (61) | 404 (64) | 159 (60) | 153 (58) | 231 (64) | |
| Bangladeshi | 92 (15) | 83 (13) | 37 (14) | 43 (16) | 38 (11) | |
| Black African | 48 (8) | 61 (10) | 30 (11) | 17 (6) | 39 (11) | |