Results of an additional survey on the humidifier detergent exposure of cases
| 2011 cases (n=16) | 2004–2010 case (n=12) | |
|---|---|---|
| Chemical type | ||
| PGH | 2 (12.5%) | 0 (0.0%) |
| PHMG | 12 (75.0%) | 10 (83.3%) |
| Unknown | 2 (12.5%) | 2 (16.7%) |
| Exposure duration (months, mean±SD) | ||
| Lifetime cumulative | 17.5±14.8 | 9.9±5.8 |
| Between 2011F/W and 2012S/S | 4.7±1.2 | |
F/W, fall and winter; PGH, oligo [2-(2-ethoxy) ethoxyethyl] guanidium chloride; PHMG, polyhexamethyleneguanidine; S/S, spring and summer.