Table 3 Classification of lung injury according to the use of characteristics of humidifier disinfectant
Classification | Total | Fatal | Non-fatal | P-value |
|---|---|---|---|---|
Use of humidifier disinfectant prior to the onset of 1st lung injury | ||||
Yes | 38 (100%) | 10 (100%) | 28 (100%) | NA |
No | 0 | 0 | 0 | |
Total months of humidifier use | ||||
<12 | 15 (37%) | 7 (70%) | 8 (29%) | 0.011 |
12-24 | 13 (34%) | 3 (30%) | 10 (36%) | |
30-72 | 11 (29%) | 10 (36%) | ||
Sleeping in a room with a humidifier using disinfectant | ||||
Yes | 26 (68%) | 7 (70%) | 19 (68%) | 0.900 |
No | 12 (32%) | 3 (30%) | 9 (32%) | |
Hours of humidifier disinfectant use per day* | ||||
<11.5 | 19 (50%) | 5 (50%) | 14 (50%) | 1.000 |
> = 11.5 | 19 (50%) | 5 (50%) | 14 (50%) | |
Duration of humidifier disinfectant use after lung injury symptom onset, months | ||||
<2 | 14 (37%) | 5 (50%) | 9 (32%) | 0.320 |
> = 2 | 24 (63%) | 5 (50%) | 19 (68%) | |
Duration of humidifier disinfectant use before lung injury symptom onset, years | ||||
≤ 1 | 17 (45%) | 7 (70%) | 10 (36%) | 0.060 |
1.1-19 | 21 (55%) | 3 (30%) | 18 (64%) | |
Type of disinfectant | ||||
PHMG | 36 (95%) | 9 (90%) | 27 (96%) | 0.462 |
PHG | 2 (5%) | 1 (10%) | 1 (4%) | |
Type of humidifier disinfectant | ||||
Oxy® | 26 (68%) | 7 (70%) | 19 (68%) | 0.900 |
Other six brands | 12 (32%) | 3 (30%) | 9 (32%) | |