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Table 1 Study subjects’ general characteristics

From: Psychological effects of a disastrous hydrogen fluoride spillage on the local community

  1st survey (1 month) 2nd survey (7 months) P-valuea
Variable n (%) n (%)  
Age      0.092
  < 20 304 (22.4) 202 (28.4)
 20–29 203 (14.9) 108 (15.2)
 30–39 306 (22.5) 154 (21.7)
 40–49 260 (19.1) 126 (17.7)
 50–59 136 (10.0) 59 (8.3)
 60–69 56 (4.1) 24 (3.4)
 70–79 70 (5.2) 31 (4.4)
  ≥ 80 24 (1.8) 7 (1.0)
Gender      0.679
 Male 836 (61.5) 444 (62.4)
 Female 523 (38.5) 267 (37.6)
Population      0.000
 Middle schoolb 310 (22.8) 215 (30.2)
 Residentc 220 (16.2) 83 (11.7)
 Workerd 829 (61.0) 413 (58.1)
Exposure level      0.920
 Extremely low 90 (6.6) 52 (7.3)
 Low 463 (34.1) 237 (33.3)
 Moderate 430 (31.6) 229 (32.2)
 High 376 (27.7) 193 (27.1)
Total 1359 (100.0) 711 (100.0)  
  1. ap value for chi-square test
  2. bworkers and students of Okgye East Middle School
  3. cresidents living near the accident site
  4. dworkers employed by companies near the accident site