From: Misclassification and characterization of exposure to humidifier disinfectants using a questionnaire
Characteristics | Class 1 | Class 2 | Class 3 | Class 4 | Indetermination | Total | p-value | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
N | (%) | N | (%) | N | (%) | N | (%) | N | (%) | N | (%) | ||
Total | 4351 | 83.0 | 281 | 5.4 | 204 | 3.9 | 264 | 5.0 | 145 | 2.8 | 5245 | 100.0 | Â |
Sex |  |  |  |  |  |  |  |  |  |  |  |  | < 0.01 |
 Male | 2285 | 85.4 | 113 | 4.2 | 89 | 3.3 | 146 | 5.5 | 70 | 2.6 | 2675 | 100.0 |  |
 Female | 2063 | 81.0 | 168 | 6.6 | 115 | 4.5 | 118 | 4.6 | 55 | 2.2 | 2547 | 100.0 |  |
 Unknown | 3 | 13.0 | 0 | 0.0 | 0 | 0.0 | 0 | 0.0 | 20 | 87.0 | 23 | 100.0 |  |
Survival status | < 0.01 | ||||||||||||
 Survival | 3479 | 86.4 | 215 | 5.3 | 133 | 3.3 | 72 | 1.8 | 72 | 1.8 | 4027 | 100.0 |  |
 Death | 872 | 71.6 | 66 | 5.4 | 71 | 5.8 | 73 | 6.0 | 73 | 6.0 | 1218 | 100.0 |  |
Age at damage (years) | < 0.01 | ||||||||||||
  < 10 | 1088 | 70.8 | 142 | 9.2 | 106 | 6.9 | 145 | 9.4 | 55 | 3.6 | 1536 | 100.0 |  |
 10s | 117 | 91.4 | 3 | 2.3 | 1 | 0.8 | 3 | 2.3 | 4 | 3.1 | 128 | 100.0 |  |
 20s | 299 | 89.0 | 10 | 3.0 | 8 | 2.4 | 12 | 3.6 | 7 | 2.1 | 336 | 100.0 |  |
 30s | 755 | 82.3 | 41 | 4.5 | 33 | 3.6 | 72 | 7.9 | 16 | 1.7 | 917 | 100.0 |  |
 40s | 467 | 91.2 | 20 | 3.9 | 12 | 2.3 | 6 | 1.2 | 7 | 1.4 | 512 | 100.0 |  |
 50s | 501 | 91.3 | 18 | 3.3 | 14 | 2.6 | 8 | 1.5 | 8 | 1.5 | 549 | 100.0 |  |
 60s | 459 | 91.8 | 18 | 3.6 | 12 | 2.4 | 4 | 0.8 | 7 | 1.4 | 500 | 100.0 |  |
 70s | 240 | 92.7 | 12 | 4.6 | 3 | 1.2 | 1 | 0.4 | 3 | 1.2 | 259 | 100.0 |  |
  ≥ 80 | 53 | 94.6 | 1 | 1.8 | 0 | 0.0 | 0 | 0.0 | 2 | 3.6 | 56 | 100.0 |  |
 Unknown | 372 | 82.3 | 16 | 3.5 | 15 | 3.3 | 13 | 2.9 | 36 | 8.0 | 452 | 100.0 |  |
Susceptible group | < 0.01 | ||||||||||||
 Pregnant women | 261 | 77.0 | 10 | 3.0 | 18 | 5.3 | 44 | 13.0 | 6 | 1.7 | 339 | 100.0 |  |
 Fetus | 311 | 70.8 | 42 | 9.6 | 30 | 6.8 | 17 | 3.9 | 39 | 8.9 | 439 | 100.0 |  |
Others | 3779 | 84.6 | 229 | 5.1 | 156 | 3.5 | 203 | 4.6 | 100 | 2.2 | 4467 | 100.0 | Â |