Table 2.
Results of alarm function 15 months post-installation
| Ionisation, zinc battery
|
Ionisation, zinc battery, pause button
|
Ionisation, lithium battery, pause button
|
Optical, lithium battery
|
Optical, zinc battery
|
|||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| All homes (n=625)
|
Smoker occupier (n=295)
|
Open plan kitchen (n=148)
|
All homes (n=628)
|
Smoker occupier (n=295)
|
Open plan kitchen (n=149)
|
All homes (n=267)
|
Smoker occupier (n=127)
|
Open plan kitchen (n=62)
|
All homes (n=266)
|
Smoking occupier (n=125)
|
Open plan kitchen (n=60)
|
All homes (n=359)
|
Smoker occupier (n=170)
|
Open plan kitchen (n=87)
|
|||||
| Any alarm working | 363 (58) | 148 (50) | 78 (53) | 311 (50) | 128 (43) | 71 (48) | 184 (69) | 75 (59) | 40 (65) | 160 (60) | 61 (49) | 29 (48) | 148 (41) | 53 (31) | 35 (40) | ||||
| Study alarm working | 350 (56) | 147 (50) | 77 (52) | 293 (47) | 124 (42) | 68 (46) | 175 (66) | 73 (57) | 39 (63) | 148 (56) | 61 (49) | 29 (48) | 131 (36) | 51 (30) | 35 (40) | ||||
| Study alarm absent | 113 (18) | 58 (20) | 29 (20) | 80 (13) | 38 (13) | 18 (12) | 49 (18) | 28 (22) | 9 (15) | 56 (21) | 32 (26) | 18 (30) | 67 (19) | 35 (21) | 16 (18) | ||||
| Battery missing* | 97 (16) | 57 (19) | 22 (15) | 180 (29) | 98 (33) | 46 (31) | 4 (1) | 2 (2) | 1 (2) | 33 (12) | 16 (13) | 7 (12) | 103 (29) | 53 (31) | 24 (28) | ||||
| Battery disconnected* | 24 (4) | 11 (4) | 6 (4) | 26 (4) | 12 (4) | 5 (3) | 14 (5) | 8 (6) | 5 (8) | 6 (2) | 2 (2) | 2 (3) | 9 (3) | 5 (3) | 1 (1) | ||||
| Battery dead* | 4 (<1) | 2 (<1) | 0 | 9 (1) | 4 (1) | 1 (<1) | 1 (<1) | 1 (<1) | 1 (2) | 6 (2) | 4 (3) | 0 | 21 (6) | 11 (6) | 6 (7) | ||||
*
Not mutually exclusive.