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Table 2 High risk rate of upper extremities musculoskeletal symptoms by characteristics of subjects (n = 166)

From: Risk factors of work-related upper extremity musculoskeletal disorders in male cameramen

   Subjects Neck Shoulder Arm/elbow Hand/wrist Upp. ext
Total   166(100) 13(7.8) 24(14.5) 10(6.0) 11(6.6) 34(20.5)
Age (year) 30-39 35(21.1) 5(14.3) 3(8.6) 2(5.7) 2(5.7) 5(14.3)
  40-49 66(39.8) 1(1.5) 9(13.6) 3(4.5) 4(6.1) 12(18.2)
  ≥50 65(39.2) 7(10.8) 12(18.5) 5(7.7) 5(7.7) 17(26.2)
BMI (kg/m 2 ) <25 90(63.8) 4(4.4) 6(6.7)* 2(2.2)* 3(3.3)* 7(10.0)
  ≥25 51(36.2) 6(11.8) 14(27.5) 7(13.7) 7(13.7) 18(37.3)
Tenure (month) 12-117 46(27.7) 4(8.7) 5(10.9) 2(4.3) 4(8.7) 8(17.4)
  118-212 37(22.3) 1(2.7) 3(8.1) 1(2.7) 2(5.4) 4(10.8)
  213-324 44(26.5) 4(9.1) 6(13.6) 3(6.8) 3(6.8) 10(22.7)
  ≥325 39(23.5) 4(10.3) 10(25.6) 4(10.3) 2(5.1) 12(30.8)
Working <9 77(50.0) 4(4.4) 8(10.4) 3(3.9) 2(2.6)* 10(13.0)*
Hours (hour) ≥9 77(50.0) 6(11.8) 14(18.2) 7(9.1) 9(11.7) 22(28.6)
Break time <30 80(54.2) 7(8.8) 13(14.4) 3(3.3) 4(4.4) 19(21.1)
(minute) ≥30 52(31.3) 6(9.5) 7(13.5) 4(7.7) 6(11.5) 10(19.2)
Exercise Yes 69(41.6) 4(5.8) 5(7.2)* 2(2.9) 3(4.3) 6(8.7)
  No 96(57.8) 9(9.4) 19(19.8) 8(8.3) 8(8.3) 28(29.2)
House work <1 hr/day 134(80.7) 8(6.4) 20(14.9) 8(6.0) 9(6.7) 30(22.4)
  ≥1 hr/day 29(17.5) 4(10.5) 3(10.3) 1(3.4) 1(3.4) 3(10.3)
Physical N to M§ 75(45.2) 1(1.3)* 7(9.3)† 5(6.7) 2(2.7)* 10(13.3)
burden Hard 70(42.2) 7(10.0) 8(11.4) 3(4.3) 5(7.1) 13(18.6)
  Very hard 21(12.7) 5(23.8) 9(42.9) 2(9.5) 4(19.0) 11(52.4)
Ergonomics Low risk 78(51.3) 3(3.8)* 7(9.0) 4(5.1) 2(2.6)* 11(14.1)
  High risk 74(48.7) 10(13.5) 17(23.0) 6(8.1) 9(12.2) 23(31.1)
  1. Chi-square test or Fisher’s exact test: Working hours, Break time, Exercise, House work, Ergonomics, BMI.
  2. Chi-square test for trend : Age, Tenure, Physical burden.
  3. *p <0.05 by chi-square test or chi-square test for trend, comparison between subgroups.
  4. p <0.01 by chi-square test or chi-square test for trend, comparison between subgroups.
  5. Exercise Yes: >3 times/week, >40 minutes/one time.
  6. §N to M: None to moderate.
  7. Ergonomics: check list from OSHA Draft Ergonomics Standard, a score of 10 or above is high risk group.