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Table 1 Characteristics of study subjects according to occupational injury risk

From: Relationship between occupational injuries and the provision of safety and health information: data from the 4th Korean working conditions survey

Variables Total Risk of occupational injury
   Low-risk High-risk p-valuec
Na %b Na %b Na %b
Total 24,527 100 18,177 74.1 6350 25.9  
General characteristics
Age (years)
 15–29 3454 13.6 2746 14.6 708 10.7 < 0.001
 30–39 6151 26.3 4811 27.9 1340 21.3  
 40–49 7092 29.1 5284 29.2 1808 28.8  
 50–59 4920 19.7 3349 17.9 1571 25.1  
 ≥ 60 2910 11.3 1987 10.4 923 14.1  
Sex
 Male 12,639 51.8 8640 47.8 3999 64.1 < 0.001
 Female 11,888 48.2 9537 52.2 2351 35.9  
Education level
 Middle school or below 2996 11.3 1887 9.4 1109 17.0 < 0.001
 High school 9455 36.8 6266 32.4 3189 50.0  
 College or above 12,076 52.0 10,024 58.2 2052 33.1  
Monthly income (KRW 10,000)
 < 150 7435 27.3 5501 27.1 1934 28.0 < 0.001
 150–249 8510 35.0 6198 34.2 2312 37.3  
 250–399 6467 28.3 4773 28.4 1694 27.9  
 ≥ 400 2115 9.4 1705 10.3 410 6.7  
Occupational characteristics
Occupational type
 White-collar 10,228 44.9 8943 52.5 1285 21.8 < 0.001
 Pink-collar 6441 24.2 4865 24.8 1576 22.5  
 Blue-collar 7858 30.9 4369 22.8 3489 55.7  
Number of employees
 1–4 5495 20.5 4047 20.3 1448 21.3 0.186
 5–49 12,514 52.2 9302 52.3 3212 51.8  
 50–299 4459 19.1 3317 19.3 1142 18.5  
 ≥ 300 2059 8.2 1511 8.1 548 8.3  
Working hours per a week (hours)
 < 40 13,301 52.9 10,350 55.5 2951 44.9 < 0.001
 41–52 6796 29.3 4955 29.2 1841 29.5  
 53–60 3087 12.5 2011 10.8 1076 17.6  
 ≥ 61 1343 5.4 861 4.6 482 7.9  
Tenure (years)
 < 1 3018 11.6 2203 11.3 815 12.5 < 0.001
 1–5 8846 37.2 6713 38.1 2133 34.4  
 ≥ 5 12,663 51.2 9261 50.6 3402 53.1  
Shift work
 Yes 2551 10.0 1643 8.6 908 14.5 < 0.001
 No 21,976 90.0 16,534 91.4 5442 85.5  
Type of employment
 Regular 18,188 76.1 13,841 78.1 4347 69.8 < 0.001
 Temporary 6339 23.9 4336 21.9 2003 30.2  
Labor unions
 Presence 3441 14.3 2506 14.2 935 14.8 0.219
 Absence 21,086 85.7 15,671 85.8 5415 85.2  
Job-related factors
Physical risk factors
 Yes 9467 37.4 5243 27.9 4224 66.6 < 0.001
 No 15,060 62.6 12,934 72.1 2126 33.4  
Biochemical risk factors
 Yes 6097 24.0 3017 15.8 3080 49.0 < 0.001
 No 18,430 76.0 15,160 84.2 3270 51.0  
Ergonomic risk factors
 Yes 20,495 81.8 14,438 77.5 6057 94.9 < 0.001
 No 4032 18.2 3739 22.5 293 5.1  
Usage of personal protective equipment
 No need 18,510 76.7 15,468 86.2 3042 47.8 < 0.001
 Need/wear 5478 21.2 2440 12.4 3038 47.8  
 Need/no wear 539 2.2 269 1.4 270 4.4  
Provision of safety and health information
 Yes 15,623 64.2 11,227 62.3 4396 70.1 < 0.001
 No 8904 35.8 6950 37.7 1954 29.9  
Occupational injuries
 Yes 276 1.0 82 0.4 194 3.1 < 0.001
 No 24,251 99.0 18,095 99.6 6156 96.9  
  1. aUnweighted case numbers of workers
  2. bPercentages based on weighted analysis
  3. cDerived by weighted chi-squared test