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Table 2 General characteristics and working conditions of OEM residents according to training institution and residency year

From: Residency programs and the outlook for occupational and environmental medicine in Korea

Variables   Institution   Residency year  
Total a Institute Hospital P-value * Lower Higher P-value **
Gender b        
 Male 70 (79.5) 5 (55.6) 65 (82.3) 0.060 35 (76.1) 35 (83.3) 0.400
 Female 18 (20.5) 4 (44.4) 14 (17.7)   11 (23.9) 7 (16.7)  
Age c 31.7 ± 3.6 31.6 ± 2.8 31.8 ± 3.7 0.847 31.2 ± 3.8 32.4 ± 3.2 0.119
Working region b        
 Seoul metropolitan area 45 (51.1) 9 (100.0) 35 (44.9) 0.001 27 (58.7) 18 (42.9) 0.138
 Other areas 43 (48.9) 0 (0.0) 43 (55.1)   19 (41.3) 24 (57.1)  
Other Specialty before OEM? b        
 Yes: practiced other specialty first 2 (2.4) 0 (0.0) 2 (2.6) 1.000 0 (0.0) 2 (5.0) 0.218
 No: directly into OEM 83 (97.6) 9 (100.0) 74 (97.4)   45 (100.0) 38 (95.0)  
Working time (hours/day)c 9.7 ± 1.8 9.6 ± 1.5 9.7 ± 1.8 0.968 9.5 ± 1.4 10.0 ± 2.1 0.176
Sleeping time (hours/day)c 6.6 ± 1.1 6.8 ± 1.3 6.5 ± 1.1 0.735 6.6 ± 1.1 6.5 ± 1.1 0.678
Off-site work (days/week) c 3.0 ± 1.5 2.1 ± 1.2 3.0 ± 1.5 0.066 2.4 ± 1.2 3.4 ± 1.5 0.001
Major responsibility when working outside the institution b        
 Health examinations 47 (63.5) 0 (0.0) 47 (74.2) 0.000 25 (69.4) 22 (57.9) 0.029
 Health management services 10 (13.5) 0 (0.0) 10 (15.2)   1 (2.8) 9 (23.7)
 Research or epidemiological surveys 17 (23.0) 8 (100.0) 9 (13.6)   10 (27.8) 7 (18.4)
Did you undergo clinical training? b        
 Yes 67 (77.9) 5 (55.6) 62 (80.5) 0.088 29 (64.4) 38 (92.7) 0.002
 No 19 (22.1) 4 (44.4) 15 (19.5)   16 (35.6) 3 (7.3)
  1. OEM Occupational and environmental medicine; SD Standard deviation
  2. *Fisher’s exact test or Mann-Whitney test
  3. **Chi-squared test or Student’s t-test
  4. aDue to missing values, the total number may be different for each variable
  5. bN (%)
  6. cMean ± SD