Table 5 Patient characteristics with respect to distance from the accident site
From: Acute Symptoms after a Community Hydrogen Fluoride Spill
| Â | Under 100 m | 100m-1 km | Over 1 km | p-value* | |||
|---|---|---|---|---|---|---|---|
N | % | N | % | N | % | ||
Sex | Â | Â | Â | Â | Â | Â | 0.000 |
 Male | 149 | 65.6 | 418 | 58.0 | 249 | 41.3 |  |
 Female | 78 | 34.4 | 303 | 42.0 | 354 | 58.7 |  |
Age | Â | Â | Â | Â | Â | Â | 0.000 |
 Under 19 | 7 | 3.1 | 22 | 3.0 | 50 | 8.3 |  |
 20~39 | 96 | 42.3 | 351 | 43.7 | 370 | 61.3 |  |
 40~59 | 117 | 51.5 | 273 | 37.9 | 162 | 26.9 |  |
 Over 60 | 7 | 3.1 | 75 | 10.4 | 21 | 3.5 |  |
Exposure characteristics | Â | Â | Â | Â | Â | 0.000 | |
 Adjacent residents | 12 | 5.4 | 126 | 17.6 | 20 | 3.3 |  |
 Other residents | 12 | 5.4 | 103 | 14.4 | 323 | 53.7 |  |
 Workers | 103 | 46.6 | 408 | 56.9 | 187 | 31.1 |  |
 Firefighters | 19 | 8.6 | 1 | 0.1 | 3 | 0.5 |  |
 Public officials | 9 | 4.1 | 8 | 1.1 | 5 | 0.8 |  |
 Others | 66 | 29.9 | 71 | 9.9 | 64 | 10.6 |  |
Time of hospital visit | Â | Â | Â | Â | Â | 0.000 | |
 Within 3 days | 37 | 16.3 | 25 | 3.5 | 8 | 1.3 |  |
 4 days or after | 190 | 83.7 | 696 | 96.5 | 595 | 98.7 |  |
Abnormal physical findings | Â | Â | Â | Â | Â | Â | |
 Throat | 72/136 | 52.9 | 273/466 | 58.6 | 204/400 | 51.0 | 0.240 |
 Nose | 10/80 | 12.5 | 25/248 | 10.1 | 16/223 | 7.2 | 0.126 |
 Eye | 12/82 | 14.6 | 35/250 | 14.0 | 25/242 | 10.3 | 0.202 |
 Lung | 7/95 | 7.4 | 8/326 | 2.5 | 3/303 | 1.0 | 0.001 |
 Heart | 0/92 | 0.0 | 0/294 | 0.0 | 0/292 | 0.0 | - |
 Skin | 7/72 | 9.7 | 15/225 | 6.7 | 8/229 | 3.5 | 0.002 |
Abnormal PFT | Â | Â | Â | Â | Â | Â | Â |
 FVC%†| 2/14 | 14.3 | 1/27 | 3.7 | 1/7 | 14.3 | 0.739 |
 FEV1/FVC%‡ | 0/14 | 0.0 | 2/27 | 7.4 | 0/7 | 0.0 | 0.747 |